diff options
| author |   Vladimir Barinov <vladimir.barinov@cogentembedded.com> | 2018-01-23 12:39:37 +0300 |
|---|---|---|
| committer | Vladimir Barinov <vladimir.barinov@cogentembedded.com> | 2018-01-23 12:39:37 +0300 |
| commit | 7f4eccd38eb4222c4795894b64e150cd1d96c2c5 (patch) | |
| tree | f6b3207a0a579dbd4ff3498e83a3a0dec4c6295b | |
| parent | 5e4254af7d0345fe8b3bd5b786dbfa5f710e5d3e (diff) | |
MSIOF: add SPIDEV function
1) add spidev function on MSIOF
2) set MSOIF1 master and MSIOF slave on V3MSK VideoBoxMini
11 files changed, 4348 insertions, 6 deletions
diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0040-arm64-dts-renesas-add-ADAS-boards.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0040-arm64-dts-renesas-add-ADAS-boards.patch index 483ba45..4d914f1 100644 --- a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0040-arm64-dts-renesas-add-ADAS-boards.patch +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0040-arm64-dts-renesas-add-ADAS-boards.patch @@ -65,10 +65,10 @@ Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> .../boot/dts/renesas/r8a7797-eagle-function.dts | 62 + arch/arm64/boot/dts/renesas/r8a7797-eagle.dts | 575 +++++++ arch/arm64/boot/dts/renesas/r8a7797-v3msk-kf.dts | 578 +++++++ - arch/arm64/boot/dts/renesas/r8a7797-v3msk-vbm.dts | 518 ++++++ + arch/arm64/boot/dts/renesas/r8a7797-v3msk-vbm.dts | 550 ++++++ arch/arm64/boot/dts/renesas/r8a7797-v3msk-view.dts | 298 ++++ arch/arm64/boot/dts/renesas/r8a7797-v3msk.dts | 314 ++++ - arch/arm64/boot/dts/renesas/r8a7798-condor.dts | 939 +++++++++++ + arch/arm64/boot/dts/renesas/r8a7798-condor.dts | 940 +++++++++++ arch/arm64/boot/dts/renesas/ulcb-kf-cn11.dtsi | 545 ++++++ arch/arm64/boot/dts/renesas/ulcb-kf-most.dtsi | 30 + arch/arm64/boot/dts/renesas/ulcb-kf-sd3.dtsi | 46 + @@ -77,7 +77,7 @@ Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> arch/arm64/boot/dts/renesas/ulcb-vb.dtsi | 1726 +++++++++++++++++++ arch/arm64/boot/dts/renesas/ulcb-vb2.dtsi | 1772 ++++++++++++++++++++ arch/arm64/boot/dts/renesas/ulcb-vbm.dtsi | 578 +++++++ - 47 files changed, 20099 insertions(+) + 47 files changed, 20132 insertions(+) create mode 100644 arch/arm64/boot/dts/renesas/legacy/Makefile create mode 100644 arch/arm64/boot/dts/renesas/legacy/r8a7795-es1-h3ulcb-kf-v0.dts create mode 100644 arch/arm64/boot/dts/renesas/legacy/r8a7795-es1-h3ulcb-kf-v1.dts @@ -11617,10 +11617,10 @@ index 0000000..b92fe83 +}; diff --git a/arch/arm64/boot/dts/renesas/r8a7797-v3msk-vbm.dts b/arch/arm64/boot/dts/renesas/r8a7797-v3msk-vbm.dts new file mode 100644 -index 0000000..26f8c70 +index 0000000..8612f64 --- /dev/null +++ b/arch/arm64/boot/dts/renesas/r8a7797-v3msk-vbm.dts -@@ -0,0 +1,518 @@ +@@ -0,0 +1,550 @@ +/* + * Device Tree Source for the V3MSK Videobox Mini board on r8a7797 + * @@ -11987,6 +11987,28 @@ index 0000000..26f8c70 + }; +}; + ++&msiof1 { ++ pinctrl-0 = <&msiof1_pins>; ++ pinctrl-names = "default"; ++ cs-gpios = <&gpio3 3 0>; ++ ++ status = "okay"; ++ spidev@0 { ++ compatible = "spidev"; ++ reg = <0>; ++ spi-max-frequency = <66666666>; ++ }; ++ ++}; ++ ++&msiof3 { ++ pinctrl-0 = <&msiof3_pins>; ++ pinctrl-names = "default"; ++ ++ status = "okay"; ++ slave; ++}; ++ +&pfc { + canfd0_pins: canfd0 { + groups = "canfd0_data_a"; @@ -12003,6 +12025,16 @@ index 0000000..26f8c70 + function = "i2c1"; + }; + ++ msiof1_pins: msiof1 { ++ groups = "msiof1_clk", "msiof1_txd", "msiof1_rxd"; ++ function = "msiof1"; ++ }; ++ ++ msiof3_pins: msiof3 { ++ groups = "msiof3_clk", "msiof3_txd", "msiof3_rxd", "msiof3_sync"; ++ function = "msiof3"; ++ }; ++ + scif3_pins: scif3 { + groups = "scif3_data"; + function = "scif3"; @@ -12765,7 +12797,7 @@ index 0000000..91d10c5 +}; diff --git a/arch/arm64/boot/dts/renesas/r8a7798-condor.dts b/arch/arm64/boot/dts/renesas/r8a7798-condor.dts new file mode 100644 -index 0000000..ed9cc28 +index 0000000..b236d66 --- /dev/null +++ b/arch/arm64/boot/dts/renesas/r8a7798-condor.dts @@ -0,0 +1,940 @@ diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0083-spi-Document-DT-bindings-for-SPI-controllers-in-slav.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0083-spi-Document-DT-bindings-for-SPI-controllers-in-slav.patch new file mode 100644 index 0000000..0266378 --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0083-spi-Document-DT-bindings-for-SPI-controllers-in-slav.patch @@ -0,0 +1,118 @@ +From c71da12ba9738ac1441fb431100cb03662ba9ac1 Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven <geert+renesas@glider.be> +Date: Fri, 17 Jun 2016 18:05:32 +0200 +Subject: [PATCH 1/7] spi: Document DT bindings for SPI controllers in slave + mode + +Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> +Reviewed-by: Rob Herring <robh@kernel.org> +--- + Documentation/devicetree/bindings/spi/spi-bus.txt | 76 ++++++++++++--------- + 1 file changed, 45 insertions(+), 31 deletions(-) + +diff --git a/Documentation/devicetree/bindings/spi/spi-bus.txt b/Documentation/devicetree/bindings/spi/spi-bus.txt +index 4b1d6e7..1f6e86f 100644 +--- a/Documentation/devicetree/bindings/spi/spi-bus.txt ++++ b/Documentation/devicetree/bindings/spi/spi-bus.txt +@@ -1,17 +1,23 @@ + SPI (Serial Peripheral Interface) busses + +-SPI busses can be described with a node for the SPI master device +-and a set of child nodes for each SPI slave on the bus. For this +-discussion, it is assumed that the system's SPI controller is in +-SPI master mode. This binding does not describe SPI controllers +-in slave mode. ++SPI busses can be described with a node for the SPI controller device ++and a set of child nodes for each SPI slave on the bus. The system's SPI ++controller may be described for use in SPI master mode or in SPI slave mode, ++but not for both at the same time. + +-The SPI master node requires the following properties: ++The SPI controller node requires the following properties: ++- compatible - Name of SPI bus controller following generic names ++ recommended practice. ++ ++In master mode, the SPI controller node requires the following additional ++properties: + - #address-cells - number of cells required to define a chip select + address on the SPI bus. + - #size-cells - should be zero. +-- compatible - name of SPI bus controller following generic names +- recommended practice. ++ ++In slave mode, the SPI controller node requires one additional property: ++- spi-slave - Empty property. ++ + No other properties are required in the SPI bus node. It is assumed + that a driver for an SPI bus device will understand that it is an SPI bus. + However, the binding does not attempt to define the specific method for +@@ -21,7 +27,7 @@ assumption that board specific platform code will be used to manage + chip selects. Individual drivers can define additional properties to + support describing the chip select layout. + +-Optional properties: ++Optional properties (master mode only): + - cs-gpios - gpios chip select. + - num-cs - total number of chipselects. + +@@ -41,28 +47,36 @@ cs1 : native + cs2 : &gpio1 1 0 + cs3 : &gpio1 2 0 + +-SPI slave nodes must be children of the SPI master node and can +-contain the following properties. +-- reg - (required) chip select address of device. +-- compatible - (required) name of SPI device following generic names +- recommended practice. +-- spi-max-frequency - (required) Maximum SPI clocking speed of device in Hz. +-- spi-cpol - (optional) Empty property indicating device requires +- inverse clock polarity (CPOL) mode. +-- spi-cpha - (optional) Empty property indicating device requires +- shifted clock phase (CPHA) mode. +-- spi-cs-high - (optional) Empty property indicating device requires +- chip select active high. +-- spi-3wire - (optional) Empty property indicating device requires +- 3-wire mode. +-- spi-lsb-first - (optional) Empty property indicating device requires +- LSB first mode. +-- spi-tx-bus-width - (optional) The bus width (number of data wires) that is +- used for MOSI. Defaults to 1 if not present. +-- spi-rx-bus-width - (optional) The bus width (number of data wires) that is +- used for MISO. Defaults to 1 if not present. +-- spi-rx-delay-us - (optional) Microsecond delay after a read transfer. +-- spi-tx-delay-us - (optional) Microsecond delay after a write transfer. ++ ++SPI slave nodes must be children of the SPI controller node. ++ ++In master mode, one or more slave nodes (up to the number of chip selects) can ++be present. Required properties are: ++- compatible - Name of SPI device following generic names recommended ++ practice. ++- reg - Chip select address of device. ++- spi-max-frequency - Maximum SPI clocking speed of device in Hz. ++ ++In slave mode, the (single) slave node is optional. ++If present, it must be called "slave". Required properties are: ++- compatible - Name of SPI device following generic names recommended ++ practice. ++ ++All slave nodes can contain the following optional properties: ++- spi-cpol - Empty property indicating device requires inverse clock ++ polarity (CPOL) mode. ++- spi-cpha - Empty property indicating device requires shifted clock ++ phase (CPHA) mode. ++- spi-cs-high - Empty property indicating device requires chip select ++ active high. ++- spi-3wire - Empty property indicating device requires 3-wire mode. ++- spi-lsb-first - Empty property indicating device requires LSB first mode. ++- spi-tx-bus-width - The bus width (number of data wires) that is used for MOSI. ++ Defaults to 1 if not present. ++- spi-rx-bus-width - The bus width (number of data wires) that is used for MISO. ++ Defaults to 1 if not present. ++- spi-rx-delay-us - Microsecond delay after a read transfer. ++- spi-tx-delay-us - Microsecond delay after a write transfer. + + Some SPI controllers and devices support Dual and Quad SPI transfer mode. + It allows data in the SPI system to be transferred using 2 wires (DUAL) or 4 +-- +1.7.10.4 diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0084-spi-core-Add-support-for-registering-SPI-slave-contr.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0084-spi-core-Add-support-for-registering-SPI-slave-contr.patch new file mode 100644 index 0000000..780459c --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0084-spi-core-Add-support-for-registering-SPI-slave-contr.patch @@ -0,0 +1,445 @@ +From 069206bafab71d97d2c427ed664e7cbacbe0678c Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven <geert+renesas@glider.be> +Date: Fri, 17 Jun 2016 16:45:37 +0200 +Subject: [PATCH 2/7] spi: core: Add support for registering SPI slave + controllers + +Add support for registering SPI slave controllers using the existing SPI +master framework: + - SPI slave controllers must use spi_alloc_slave() instead of + spi_alloc_master(), and should provide an additional callback + "slave_abort" to abort an ongoing SPI transfer request, + - SPI slave controllers are added to a new "spi_slave" device class, + - SPI slave handlers can be bound to the SPI slave device represented + by an SPI slave controller using a DT child node named "slave", + - Alternatively, (un)binding an SPI slave handler to the SPI slave + device represented by an SPI slave controller can be done by + (un)registering the slave device through a sysfs virtual file named + "slave". + +From the point of view of an SPI slave protocol handler, an SPI slave +controller looks almost like an ordinary SPI master controller. The only +exception is that a transfer request will block on the remote SPI +master, and may be cancelled using spi_slave_abort(). + +Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> +--- + drivers/spi/Kconfig | 14 +++- + drivers/spi/Makefile | 2 + + drivers/spi/spi.c | 179 ++++++++++++++++++++++++++++++++++++++++------- + include/linux/spi/spi.h | 35 +++++++-- + 4 files changed, 201 insertions(+), 29 deletions(-) + +diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig +index fb418d5..8c97790 100644 +--- a/drivers/spi/Kconfig ++++ b/drivers/spi/Kconfig +@@ -781,6 +781,18 @@ config SPI_TLE62X0 + + endif # SPI_MASTER + +-# (slave support would go here) ++# ++# SLAVE side ... listening to other SPI masters ++# ++ ++config SPI_SLAVE ++ bool "SPI slave protocol handlers" ++ help ++ If your system has a slave-capable SPI controller, you can enable ++ slave protocol handlers. ++ ++if SPI_SLAVE ++ ++endif # SPI_SLAVE + + endif # SPI +diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile +index aa939d9..2428b0f 100644 +--- a/drivers/spi/Makefile ++++ b/drivers/spi/Makefile +@@ -102,3 +102,5 @@ obj-$(CONFIG_SPI_XILINX) += spi-xilinx.o + obj-$(CONFIG_SPI_XLP) += spi-xlp.o + obj-$(CONFIG_SPI_XTENSA_XTFPGA) += spi-xtensa-xtfpga.o + obj-$(CONFIG_SPI_ZYNQMP_GQSPI) += spi-zynqmp-gqspi.o ++ ++# SPI slave protocol handlers +diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c +index 838783c..a403e3a 100644 +--- a/drivers/spi/spi.c ++++ b/drivers/spi/spi.c +@@ -1513,15 +1513,6 @@ static int spi_master_initialize_queue(struct spi_master *master) + goto err_out; + } + +- /* Device address */ +- rc = of_property_read_u32(nc, "reg", &value); +- if (rc) { +- dev_err(&master->dev, "%s has no valid 'reg' property (%d)\n", +- nc->full_name, rc); +- goto err_out; +- } +- spi->chip_select = value; +- + /* Mode (clock phase/polarity/etc.) */ + if (of_find_property(nc, "spi-cpha", NULL)) + spi->mode |= SPI_CPHA; +@@ -1571,6 +1562,24 @@ static int spi_master_initialize_queue(struct spi_master *master) + } + } + ++ if (spi_controller_is_slave(master)) { ++ if (strcmp(nc->name, "slave")) { ++ dev_err(&master->dev, "%s is not called 'slave'\n", ++ nc->full_name); ++ return -EINVAL; ++ } ++ return 0; ++ } ++ ++ /* Device address */ ++ rc = of_property_read_u32(nc, "reg", &value); ++ if (rc) { ++ dev_err(&master->dev, "%s has no valid 'reg' property (%d)\n", ++ nc->full_name, rc); ++ return rc; ++ } ++ spi->chip_select = value; ++ + /* Device speed */ + rc = of_property_read_u32(nc, "spi-max-frequency", &value); + if (rc) { +@@ -1603,8 +1612,8 @@ static int spi_master_initialize_queue(struct spi_master *master) + * of_register_spi_devices() - Register child devices onto the SPI bus + * @master: Pointer to spi_master device + * +- * Registers an spi_device for each child node of master node which has a 'reg' +- * property. ++ * Registers an spi_device for each child node of controller node which ++ * represents a valid SPI slave. + */ + static void of_register_spi_devices(struct spi_master *master) + { +@@ -1771,28 +1780,129 @@ static void spi_master_release(struct device *dev) + .dev_groups = spi_master_groups, + }; + ++#ifdef CONFIG_SPI_SLAVE ++/** ++ * spi_slave_abort - abort the ongoing transfer request on an SPI slave ++ * controller ++ * @spi: device used for the current transfer ++ */ ++int spi_slave_abort(struct spi_device *spi) ++{ ++ struct spi_master *master = spi->master; ++ ++ if (spi_controller_is_slave(master) && master->slave_abort) ++ return master->slave_abort(master); ++ ++ return -ENOTSUPP; ++} ++EXPORT_SYMBOL_GPL(spi_slave_abort); ++ ++static int match_true(struct device *dev, void *data) ++{ ++ return 1; ++} ++ ++static ssize_t spi_slave_show(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ struct spi_master *ctlr = container_of(dev, struct spi_master, dev); ++ struct device *child; ++ ++ child = device_find_child(&ctlr->dev, NULL, match_true); ++ return sprintf(buf, "%s\n", ++ child ? to_spi_device(child)->modalias : NULL); ++} ++ ++static ssize_t spi_slave_store(struct device *dev, ++ struct device_attribute *attr, const char *buf, ++ size_t count) ++{ ++ struct spi_master *ctlr = container_of(dev, struct spi_master, dev); ++ struct spi_device *spi; ++ struct device *child; ++ char name[32]; ++ int rc; ++ ++ rc = sscanf(buf, "%31s", name); ++ if (rc != 1 || !name[0]) ++ return -EINVAL; ++ ++ child = device_find_child(&ctlr->dev, NULL, match_true); ++ if (child) { ++ /* Remove registered slave */ ++ device_unregister(child); ++ put_device(child); ++ } ++ ++ if (strcmp(name, "(null)")) { ++ /* Register new slave */ ++ spi = spi_alloc_device(ctlr); ++ if (!spi) ++ return -ENOMEM; ++ ++ strlcpy(spi->modalias, name, sizeof(spi->modalias)); ++ ++ rc = spi_add_device(spi); ++ if (rc) { ++ spi_dev_put(spi); ++ return rc; ++ } ++ } ++ ++ return count; ++} ++ ++static DEVICE_ATTR(slave, 0644, spi_slave_show, spi_slave_store); ++ ++static struct attribute *spi_slave_attrs[] = { ++ &dev_attr_slave.attr, ++ NULL, ++}; ++ ++static const struct attribute_group spi_slave_group = { ++ .attrs = spi_slave_attrs, ++}; ++ ++static const struct attribute_group *spi_slave_groups[] = { ++ &spi_master_statistics_group, ++ &spi_slave_group, ++ NULL, ++}; ++ ++static struct class spi_slave_class = { ++ .name = "spi_slave", ++ .owner = THIS_MODULE, ++ .dev_release = spi_master_release, ++ .dev_groups = spi_slave_groups, ++}; ++#else ++extern struct class spi_slave_class; /* dummy */ ++#endif + + /** +- * spi_alloc_master - allocate SPI master controller ++ * __spi_alloc_controller - allocate an SPI master or slave controller + * @dev: the controller, possibly using the platform_bus + * @size: how much zeroed driver-private data to allocate; the pointer to this + * memory is in the driver_data field of the returned device, + * accessible with spi_master_get_devdata(). ++ * @slave: flag indicating whether to allocate an SPI master (false) or SPI ++ * slave (true) controller + * Context: can sleep + * +- * This call is used only by SPI master controller drivers, which are the ++ * This call is used only by SPI controller drivers, which are the + * only ones directly touching chip registers. It's how they allocate + * an spi_master structure, prior to calling spi_register_master(). + * + * This must be called from context that can sleep. + * +- * The caller is responsible for assigning the bus number and initializing +- * the master's methods before calling spi_register_master(); and (after errors ++ * The caller is responsible for assigning the bus number and initializing the ++ * controller's methods before calling spi_register_master(); and (after errors + * adding the device) calling spi_master_put() to prevent a memory leak. + * +- * Return: the SPI master structure on success, else NULL. ++ * Return: the SPI controller structure on success, else NULL. + */ +-struct spi_master *spi_alloc_master(struct device *dev, unsigned size) ++struct spi_master *__spi_alloc_controller(struct device *dev, ++ unsigned int size, bool slave) + { + struct spi_master *master; + +@@ -1806,14 +1916,18 @@ struct spi_master *spi_alloc_master(struct device *dev, unsigned size) + device_initialize(&master->dev); + master->bus_num = -1; + master->num_chipselect = 1; +- master->dev.class = &spi_master_class; ++ master->slave = slave; ++ if (IS_ENABLED(CONFIG_SPI_SLAVE) && slave) ++ master->dev.class = &spi_slave_class; ++ else ++ master->dev.class = &spi_master_class; + master->dev.parent = dev; + pm_suspend_ignore_children(&master->dev, true); + spi_master_set_devdata(master, &master[1]); + + return master; + } +-EXPORT_SYMBOL_GPL(spi_alloc_master); ++EXPORT_SYMBOL_GPL(__spi_alloc_controller); + + #ifdef CONFIG_OF + static int of_spi_register_master(struct spi_master *master) +@@ -1889,9 +2003,11 @@ int spi_register_master(struct spi_master *master) + if (!dev) + return -ENODEV; + +- status = of_spi_register_master(master); +- if (status) +- return status; ++ if (!spi_controller_is_slave(master)) { ++ status = of_spi_register_master(master); ++ if (status) ++ return status; ++ } + + /* even if it's just one always-selected device, there must + * be at least one chipselect +@@ -1928,8 +2044,9 @@ int spi_register_master(struct spi_master *master) + status = device_add(&master->dev); + if (status < 0) + goto done; +- dev_dbg(dev, "registered master %s%s\n", dev_name(&master->dev), +- dynamic ? " (dynamic)" : ""); ++ dev_dbg(dev, "registered %s %s%s\n", ++ spi_controller_is_slave(master) ? "slave" : "master", ++ dev_name(&master->dev), dynamic ? " (dynamic)" : ""); + + /* If we're using a queued driver, start the queue */ + if (master->transfer) +@@ -3102,6 +3219,9 @@ static struct spi_master *of_find_spi_master_by_node(struct device_node *node) + + dev = class_find_device(&spi_master_class, NULL, node, + __spi_of_master_match); ++ if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE)) ++ dev = class_find_device(&spi_slave_class, NULL, node, ++ __spi_of_master_match); + if (!dev) + return NULL; + +@@ -3183,6 +3303,9 @@ static struct spi_master *acpi_spi_find_master_by_adev(struct acpi_device *adev) + + dev = class_find_device(&spi_master_class, NULL, adev, + spi_acpi_master_match); ++ if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE)) ++ dev = class_find_device(&spi_slave_class, NULL, adev, ++ spi_acpi_master_match); + if (!dev) + return NULL; + +@@ -3255,6 +3378,12 @@ static int __init spi_init(void) + if (status < 0) + goto err2; + ++ if (IS_ENABLED(CONFIG_SPI_SLAVE)) { ++ status = class_register(&spi_slave_class); ++ if (status < 0) ++ goto err3; ++ } ++ + if (IS_ENABLED(CONFIG_OF_DYNAMIC)) + WARN_ON(of_reconfig_notifier_register(&spi_of_notifier)); + if (IS_ENABLED(CONFIG_ACPI)) +@@ -3262,6 +3391,8 @@ static int __init spi_init(void) + + return 0; + ++err3: ++ class_unregister(&spi_master_class); + err2: + bus_unregister(&spi_bus_type); + err1: +diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h +index 4b743ac..f9bbd33 100644 +--- a/include/linux/spi/spi.h ++++ b/include/linux/spi/spi.h +@@ -28,8 +28,8 @@ + struct spi_flash_read_message; + + /* +- * INTERFACES between SPI master-side drivers and SPI infrastructure. +- * (There's no SPI slave support for Linux yet...) ++ * INTERFACES between SPI master-side drivers and SPI slave protocol handlers, ++ * and SPI infrastructure. + */ + extern struct bus_type spi_bus_type; + +@@ -310,6 +310,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) + * @min_speed_hz: Lowest supported transfer speed + * @max_speed_hz: Highest supported transfer speed + * @flags: other constraints relevant to this driver ++ * @slave: indicates that this is an SPI slave controller + * @max_transfer_size: function that returns the max transfer size for + * a &spi_device; may be %NULL, so the default %SIZE_MAX will be used. + * @max_message_size: function that returns the max message size for +@@ -373,6 +374,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) + * @handle_err: the subsystem calls the driver to handle an error that occurs + * in the generic implementation of transfer_one_message(). + * @unprepare_message: undo any work done by prepare_message(). ++ * @slave_abort: abort the ongoing transfer request on an SPI slave controller + * @spi_flash_read: to support spi-controller hardwares that provide + * accelerated interface to read from flash devices. + * @flash_read_supported: spi device supports flash read +@@ -443,6 +445,9 @@ struct spi_master { + #define SPI_MASTER_MUST_RX BIT(3) /* requires rx */ + #define SPI_MASTER_MUST_TX BIT(4) /* requires tx */ + ++ /* flag indicating this is an SPI slave controller */ ++ bool slave; ++ + /* + * on some hardware transfer / message size may be constrained + * the limit may depend on device transfer settings +@@ -535,6 +540,7 @@ struct spi_master { + struct spi_message *message); + int (*unprepare_message)(struct spi_master *master, + struct spi_message *message); ++ int (*slave_abort)(struct spi_master *spi); + int (*spi_flash_read)(struct spi_device *spi, + struct spi_flash_read_message *msg); + bool (*flash_read_supported)(struct spi_device *spi); +@@ -589,6 +595,11 @@ static inline void spi_master_put(struct spi_master *master) + put_device(&master->dev); + } + ++static inline bool spi_controller_is_slave(struct spi_master *ctlr) ++{ ++ return IS_ENABLED(CONFIG_SPI_SLAVE) && ctlr->slave; ++} ++ + /* PM calls that need to be issued by the driver */ + extern int spi_master_suspend(struct spi_master *master); + extern int spi_master_resume(struct spi_master *master); +@@ -599,8 +610,23 @@ static inline void spi_master_put(struct spi_master *master) + extern void spi_finalize_current_transfer(struct spi_master *master); + + /* the spi driver core manages memory for the spi_master classdev */ +-extern struct spi_master * +-spi_alloc_master(struct device *host, unsigned size); ++extern struct spi_master *__spi_alloc_controller(struct device *host, ++ unsigned int size, bool slave); ++ ++static inline struct spi_master *spi_alloc_master(struct device *host, ++ unsigned int size) ++{ ++ return __spi_alloc_controller(host, size, false); ++} ++ ++static inline struct spi_master *spi_alloc_slave(struct device *host, ++ unsigned int size) ++{ ++ if (!IS_ENABLED(CONFIG_SPI_SLAVE)) ++ return NULL; ++ ++ return __spi_alloc_controller(host, size, true); ++} + + extern int spi_register_master(struct spi_master *master); + extern int devm_spi_register_master(struct device *dev, +@@ -906,6 +932,7 @@ static inline void spi_message_free(struct spi_message *m) + extern int spi_async(struct spi_device *spi, struct spi_message *message); + extern int spi_async_locked(struct spi_device *spi, + struct spi_message *message); ++extern int spi_slave_abort(struct spi_device *spi); + + static inline size_t + spi_max_message_size(struct spi_device *spi) +-- +1.7.10.4 diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0085-spi-Document-SPI-slave-controller-support.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0085-spi-Document-SPI-slave-controller-support.patch new file mode 100644 index 0000000..57436d2 --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0085-spi-Document-SPI-slave-controller-support.patch @@ -0,0 +1,66 @@ +From 0be2c71f293e8c8423e5378cc73f71e10205ad54 Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven <geert+renesas@glider.be> +Date: Thu, 8 Sep 2016 15:01:48 +0200 +Subject: [PATCH 3/7] spi: Document SPI slave controller support + +Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> +--- + Documentation/spi/spi-summary | 27 ++++++++++++++++++++------- + 1 file changed, 20 insertions(+), 7 deletions(-) + +diff --git a/Documentation/spi/spi-summary b/Documentation/spi/spi-summary +index d1824b3..1721c1b 100644 +--- a/Documentation/spi/spi-summary ++++ b/Documentation/spi/spi-summary +@@ -62,8 +62,8 @@ chips described as using "three wire" signaling: SCK, data, nCSx. + (That data line is sometimes called MOMI or SISO.) + + Microcontrollers often support both master and slave sides of the SPI +-protocol. This document (and Linux) currently only supports the master +-side of SPI interactions. ++protocol. This document (and Linux) supports both the master and slave ++sides of SPI interactions. + + + Who uses it? On what kinds of systems? +@@ -154,9 +154,8 @@ control audio interfaces, present touchscreen sensors as input interfaces, + or monitor temperature and voltage levels during industrial processing. + And those might all be sharing the same controller driver. + +-A "struct spi_device" encapsulates the master-side interface between +-those two types of driver. At this writing, Linux has no slave side +-programming interface. ++A "struct spi_device" encapsulates the controller-side interface between ++those two types of drivers. + + There is a minimal core of SPI programming interfaces, focussing on + using the driver model to connect controller and protocol drivers using +@@ -177,10 +176,24 @@ shows up in sysfs in several locations: + /sys/bus/spi/drivers/D ... driver for one or more spi*.* devices + + /sys/class/spi_master/spiB ... symlink (or actual device node) to +- a logical node which could hold class related state for the +- controller managing bus "B". All spiB.* devices share one ++ a logical node which could hold class related state for the SPI ++ master controller managing bus "B". All spiB.* devices share one + physical SPI bus segment, with SCLK, MOSI, and MISO. + ++ /sys/devices/.../CTLR/slave ... virtual file for (un)registering the ++ slave device for an SPI slave controller. ++ Writing the driver name of an SPI slave handler to this file ++ registers the slave device; writing "(null)" unregisters the slave ++ device. ++ Reading from this file shows the name of the slave device ("(null)" ++ if not registered). ++ ++ /sys/class/spi_slave/spiB ... symlink (or actual device node) to ++ a logical node which could hold class related state for the SPI ++ slave controller on bus "B". When registered, a single spiB.* ++ device is present here, possible sharing the physical SPI bus ++ segment with other SPI slave devices. ++ + Note that the actual location of the controller's class state depends + on whether you enabled CONFIG_SYSFS_DEPRECATED or not. At this time, + the only class-specific state is the bus number ("B" in "spiB"), so +-- +1.7.10.4 diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0086-spi-sh-msiof-Add-slave-mode-support.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0086-spi-sh-msiof-Add-slave-mode-support.patch new file mode 100644 index 0000000..af15bae --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0086-spi-sh-msiof-Add-slave-mode-support.patch @@ -0,0 +1,209 @@ +From 383d0d23b9292dab56a2fdf5f6fecf898be6d142 Mon Sep 17 00:00:00 2001 +From: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com> +Date: Mon, 28 Jul 2014 14:47:56 +0900 +Subject: [PATCH 4/7] spi: sh-msiof: Add slave mode support + +Add slave mode support to the MSIOF driver, in both PIO and DMA mode. + +For now this only supports the transmission of messages with a size +that is known in advance. + +Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com> +Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com> +[geert: Timeout handling cleanup, spi core integration, cancellation, + rewording] +Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> +Acked-by: Rob Herring <robh@kernel.org> +--- + Documentation/devicetree/bindings/spi/sh-msiof.txt | 2 + + drivers/spi/spi-sh-msiof.c | 79 ++++++++++++++------ + 2 files changed, 60 insertions(+), 21 deletions(-) + +diff --git a/Documentation/devicetree/bindings/spi/sh-msiof.txt b/Documentation/devicetree/bindings/spi/sh-msiof.txt +index c2b6251..74ee3cd 100644 +--- a/Documentation/devicetree/bindings/spi/sh-msiof.txt ++++ b/Documentation/devicetree/bindings/spi/sh-msiof.txt +@@ -33,6 +33,8 @@ Optional properties: + specifiers, one for transmission, and one for + reception. + - dma-names : Must contain a list of two DMA names, "tx" and "rx". ++- spi-slave : Empty property indicating the SPI controller is used ++ in slave mode. + - renesas,dtdl : delay sync signal (setup) in transmit mode. + Must contain one of the following values: + 0 (no bit delay) +diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c +index 3281dc7..3b87024 100644 +--- a/drivers/spi/spi-sh-msiof.c ++++ b/drivers/spi/spi-sh-msiof.c +@@ -3,7 +3,7 @@ + * + * Copyright (C) 2016-2017 Renesas Electronics Corporation + * Copyright (c) 2009 Magnus Damm +- * Copyright (C) 2014 Glider bvba ++ * Copyright (C) 2014-2017 Glider bvba + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as +@@ -35,7 +35,6 @@ + + #include <asm/unaligned.h> + +- + struct sh_msiof_chipdata { + u16 tx_fifo_size; + u16 rx_fifo_size; +@@ -62,6 +61,7 @@ struct sh_msiof_spi_priv { + void *rx_dma_page; + dma_addr_t tx_dma_addr; + dma_addr_t rx_dma_addr; ++ bool slave_aborted; + unsigned int quirks; + }; + +@@ -712,6 +712,33 @@ static int sh_msiof_spi_stop(struct sh_msiof_spi_priv *p, void *rx_buf) + return ret; + } + ++static int sh_msiof_slave_abort(struct spi_master *master) ++{ ++ struct sh_msiof_spi_priv *p = spi_master_get_devdata(master); ++ ++ p->slave_aborted = true; ++ complete(&p->done); ++ return 0; ++} ++ ++static int sh_msiof_wait_for_completion(struct sh_msiof_spi_priv *p) ++{ ++ if (spi_controller_is_slave(p->master)) { ++ if (wait_for_completion_interruptible(&p->done) || ++ p->slave_aborted) { ++ dev_dbg(&p->pdev->dev, "interrupted\n"); ++ return -EINTR; ++ } ++ } else { ++ if (!wait_for_completion_timeout(&p->done, HZ)) { ++ dev_err(&p->pdev->dev, "timeout\n"); ++ return -ETIMEDOUT; ++ } ++ } ++ ++ return 0; ++} ++ + static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, + void (*tx_fifo)(struct sh_msiof_spi_priv *, + const void *, int, int), +@@ -747,6 +774,7 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, + tx_fifo(p, tx_buf, words, fifo_shift); + + reinit_completion(&p->done); ++ p->slave_aborted = false; + + ret = sh_msiof_spi_start(p, rx_buf); + if (ret) { +@@ -867,6 +895,7 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx, + reinit_completion(&p->done); + reinit_completion(&p->done_dma_tx); + reinit_completion(&p->done_dma_rx); ++ p->slave_aborted = false; + + /* Now start DMA */ + if (rx) +@@ -1205,8 +1234,14 @@ static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev) + if (!info) + return NULL; + ++ if (of_property_read_bool(np, "slave")) ++ info->mode = SPI_MSIOF_SLAVE; ++ else ++ info->mode = SPI_MSIOF_MASTER; ++ + /* Parse the MSIOF properties */ +- of_property_read_u32(np, "num-cs", &num_cs); ++ if (info->mode == SPI_MSIOF_MASTER) ++ of_property_read_u32(np, "num-cs", &num_cs); + of_property_read_u32(np, "renesas,tx-fifo-size", + &info->tx_fifo_override); + of_property_read_u32(np, "renesas,rx-fifo-size", +@@ -1214,10 +1249,6 @@ static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev) + of_property_read_u32(np, "renesas,dtdl", &info->dtdl); + of_property_read_u32(np, "renesas,syncdl", &info->syncdl); + +- if (of_property_read_bool(np, "slave")) +- info->mode = SPI_MSIOF_SLAVE; +- else +- info->mode = SPI_MSIOF_MASTER; + + info->num_chipselect = num_cs; + +@@ -1368,6 +1399,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) + struct spi_master *master; + const struct sh_msiof_chipdata *chipdata; + const struct of_device_id *of_id; ++ struct sh_msiof_spi_info *info; + struct sh_msiof_spi_priv *p; + struct clk *ref_clk; + u32 clk_rate = 0; +@@ -1375,32 +1407,36 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) + int ret; + const struct soc_device_attribute *attr; + +- master = spi_alloc_master(&pdev->dev, sizeof(struct sh_msiof_spi_priv)); +- if (master == NULL) { +- dev_err(&pdev->dev, "failed to allocate spi master\n"); +- return -ENOMEM; +- } +- +- p = spi_master_get_devdata(master); +- +- platform_set_drvdata(pdev, p); +- p->master = master; +- + of_id = of_match_device(sh_msiof_match, &pdev->dev); + if (of_id) { + chipdata = of_id->data; +- p->info = sh_msiof_spi_parse_dt(&pdev->dev); ++ info = sh_msiof_spi_parse_dt(&pdev->dev); + } else { + chipdata = (const void *)pdev->id_entry->driver_data; +- p->info = dev_get_platdata(&pdev->dev); ++ info = dev_get_platdata(&pdev->dev); + } + +- if (!p->info) { ++ if (!info) { + dev_err(&pdev->dev, "failed to obtain device info\n"); + ret = -ENXIO; + goto err1; + } + ++ if (info->mode == SPI_MSIOF_SLAVE) ++ master = spi_alloc_slave(&pdev->dev, ++ sizeof(struct sh_msiof_spi_priv)); ++ else ++ master = spi_alloc_master(&pdev->dev, ++ sizeof(struct sh_msiof_spi_priv)); ++ if (master == NULL) ++ return -ENOMEM; ++ ++ p = spi_master_get_devdata(master); ++ ++ platform_set_drvdata(pdev, p); ++ p->master = master; ++ p->info = info; ++ + attr = soc_device_match(rcar_quirks_match); + if (attr) + p->quirks = (uintptr_t)attr->data; +@@ -1458,6 +1494,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) + master->num_chipselect = p->info->num_chipselect; + master->setup = sh_msiof_spi_setup; + master->prepare_message = sh_msiof_prepare_message; ++ master->slave_abort = sh_msiof_slave_abort; + master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32); + master->auto_runtime_pm = true; + master->transfer_one = sh_msiof_transfer_one; +-- +1.7.10.4 diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0087-spi-slave-Add-SPI-slave-handler-reporting-uptime-at-.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0087-spi-slave-Add-SPI-slave-handler-reporting-uptime-at-.patch new file mode 100644 index 0000000..1c9be85 --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0087-spi-slave-Add-SPI-slave-handler-reporting-uptime-at-.patch @@ -0,0 +1,182 @@ +From 8b3a09269db92be56455d98bc8cb01f779733f0a Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven <geert+renesas@glider.be> +Date: Fri, 17 Jun 2016 17:00:25 +0200 +Subject: [PATCH 5/7] spi: slave: Add SPI slave handler reporting uptime at + previous message + +Add an example SPI slave handler responding with the uptime at the time +of reception of the last SPI message. + +This can be used by an external microcontroller as a dead man's switch. + +Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> +--- + drivers/spi/Kconfig | 6 ++ + drivers/spi/Makefile | 1 + + drivers/spi/spi-slave-time.c | 129 ++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 136 insertions(+) + create mode 100644 drivers/spi/spi-slave-time.c + +diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig +index 8c97790..267bedf 100644 +--- a/drivers/spi/Kconfig ++++ b/drivers/spi/Kconfig +@@ -793,6 +793,12 @@ config SPI_SLAVE + + if SPI_SLAVE + ++config SPI_SLAVE_TIME ++ tristate "SPI slave handler reporting boot up time" ++ help ++ SPI slave handler responding with the time of reception of the last ++ SPI message. ++ + endif # SPI_SLAVE + + endif # SPI +diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile +index 2428b0f..5e2e537 100644 +--- a/drivers/spi/Makefile ++++ b/drivers/spi/Makefile +@@ -104,3 +104,4 @@ obj-$(CONFIG_SPI_XTENSA_XTFPGA) += spi-xtensa-xtfpga.o + obj-$(CONFIG_SPI_ZYNQMP_GQSPI) += spi-zynqmp-gqspi.o + + # SPI slave protocol handlers ++obj-$(CONFIG_SPI_SLAVE_TIME) += spi-slave-time.o +diff --git a/drivers/spi/spi-slave-time.c b/drivers/spi/spi-slave-time.c +new file mode 100644 +index 0000000..fbeaa5b +--- /dev/null ++++ b/drivers/spi/spi-slave-time.c +@@ -0,0 +1,129 @@ ++/* ++ * SPI slave handler reporting uptime at reception of previous SPI message ++ * ++ * This SPI slave handler sends the time of reception of the last SPI message ++ * as two 32-bit unsigned integers in binary format and in network byte order, ++ * representing the number of seconds and fractional seconds (in microseconds) ++ * since boot up. ++ * ++ * Copyright (C) 2016-2017 Glider bvba ++ * ++ * This file is subject to the terms and conditions of the GNU General Public ++ * License. See the file "COPYING" in the main directory of this archive ++ * for more details. ++ * ++ * Usage (assuming /dev/spidev2.0 corresponds to the SPI master on the remote ++ * system): ++ * ++ * # spidev_test -D /dev/spidev2.0 -p dummy-8B ++ * spi mode: 0x0 ++ * bits per word: 8 ++ * max speed: 500000 Hz (500 KHz) ++ * RX | 00 00 04 6D 00 09 5B BB ... ++ * ^^^^^ ^^^^^^^^ ++ * seconds microseconds ++ */ ++ ++#include <linux/completion.h> ++#include <linux/module.h> ++#include <linux/sched.h> ++#include <linux/spi/spi.h> ++ ++ ++struct spi_slave_time_priv { ++ struct spi_device *spi; ++ struct completion finished; ++ struct spi_transfer xfer; ++ struct spi_message msg; ++ __be32 buf[2]; ++}; ++ ++static int spi_slave_time_submit(struct spi_slave_time_priv *priv); ++ ++static void spi_slave_time_complete(void *arg) ++{ ++ struct spi_slave_time_priv *priv = arg; ++ int ret; ++ ++ ret = priv->msg.status; ++ if (ret) ++ goto terminate; ++ ++ ret = spi_slave_time_submit(priv); ++ if (ret) ++ goto terminate; ++ ++ return; ++ ++terminate: ++ dev_info(&priv->spi->dev, "Terminating\n"); ++ complete(&priv->finished); ++} ++ ++static int spi_slave_time_submit(struct spi_slave_time_priv *priv) ++{ ++ u32 rem_us; ++ int ret; ++ u64 ts; ++ ++ ts = local_clock(); ++ rem_us = do_div(ts, 1000000000) / 1000; ++ ++ priv->buf[0] = cpu_to_be32(ts); ++ priv->buf[1] = cpu_to_be32(rem_us); ++ ++ spi_message_init_with_transfers(&priv->msg, &priv->xfer, 1); ++ ++ priv->msg.complete = spi_slave_time_complete; ++ priv->msg.context = priv; ++ ++ ret = spi_async(priv->spi, &priv->msg); ++ if (ret) ++ dev_err(&priv->spi->dev, "spi_async() failed %d\n", ret); ++ ++ return ret; ++} ++ ++static int spi_slave_time_probe(struct spi_device *spi) ++{ ++ struct spi_slave_time_priv *priv; ++ int ret; ++ ++ priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ priv->spi = spi; ++ init_completion(&priv->finished); ++ priv->xfer.tx_buf = priv->buf; ++ priv->xfer.len = sizeof(priv->buf); ++ ++ ret = spi_slave_time_submit(priv); ++ if (ret) ++ return ret; ++ ++ spi_set_drvdata(spi, priv); ++ return 0; ++} ++ ++static int spi_slave_time_remove(struct spi_device *spi) ++{ ++ struct spi_slave_time_priv *priv = spi_get_drvdata(spi); ++ ++ spi_slave_abort(spi); ++ wait_for_completion(&priv->finished); ++ return 0; ++} ++ ++static struct spi_driver spi_slave_time_driver = { ++ .driver = { ++ .name = "spi-slave-time", ++ }, ++ .probe = spi_slave_time_probe, ++ .remove = spi_slave_time_remove, ++}; ++module_spi_driver(spi_slave_time_driver); ++ ++MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>"); ++MODULE_DESCRIPTION("SPI slave reporting uptime at previous SPI message"); ++MODULE_LICENSE("GPL v2"); +-- +1.7.10.4 diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0088-spi-slave-Add-SPI-slave-handler-controlling-system-s.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0088-spi-slave-Add-SPI-slave-handler-controlling-system-s.patch new file mode 100644 index 0000000..3752e98 --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0088-spi-slave-Add-SPI-slave-handler-controlling-system-s.patch @@ -0,0 +1,205 @@ +From 6acf67e94cbd406b57315f03937a8d4d37a2952c Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven <geert+renesas@glider.be> +Date: Fri, 17 Jun 2016 17:05:45 +0200 +Subject: [PATCH 6/7] spi: slave: Add SPI slave handler controlling system + state + +Add an example SPI slave handler to allow remote control of system +reboot, power off, halt, and suspend. + +Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> +--- + drivers/spi/Kconfig | 6 ++ + drivers/spi/Makefile | 1 + + drivers/spi/spi-slave-system-control.c | 154 ++++++++++++++++++++++++++++++++ + 3 files changed, 161 insertions(+) + create mode 100644 drivers/spi/spi-slave-system-control.c + +diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig +index 267bedf..45208ec 100644 +--- a/drivers/spi/Kconfig ++++ b/drivers/spi/Kconfig +@@ -799,6 +799,12 @@ config SPI_SLAVE_TIME + SPI slave handler responding with the time of reception of the last + SPI message. + ++config SPI_SLAVE_SYSTEM_CONTROL ++ tristate "SPI slave handler controlling system state" ++ help ++ SPI slave handler to allow remote control of system reboot, power ++ off, halt, and suspend. ++ + endif # SPI_SLAVE + + endif # SPI +diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile +index 5e2e537..d4d5050 100644 +--- a/drivers/spi/Makefile ++++ b/drivers/spi/Makefile +@@ -105,3 +105,4 @@ obj-$(CONFIG_SPI_ZYNQMP_GQSPI) += spi-zynqmp-gqspi.o + + # SPI slave protocol handlers + obj-$(CONFIG_SPI_SLAVE_TIME) += spi-slave-time.o ++obj-$(CONFIG_SPI_SLAVE_SYSTEM_CONTROL) += spi-slave-system-control.o +diff --git a/drivers/spi/spi-slave-system-control.c b/drivers/spi/spi-slave-system-control.c +new file mode 100644 +index 0000000..c0257e9 +--- /dev/null ++++ b/drivers/spi/spi-slave-system-control.c +@@ -0,0 +1,154 @@ ++/* ++ * SPI slave handler controlling system state ++ * ++ * This SPI slave handler allows remote control of system reboot, power off, ++ * halt, and suspend. ++ * ++ * Copyright (C) 2016-2017 Glider bvba ++ * ++ * This file is subject to the terms and conditions of the GNU General Public ++ * License. See the file "COPYING" in the main directory of this archive ++ * for more details. ++ * ++ * Usage (assuming /dev/spidev2.0 corresponds to the SPI master on the remote ++ * system): ++ * ++ * # reboot='\x7c\x50' ++ * # poweroff='\x71\x3f' ++ * # halt='\x38\x76' ++ * # suspend='\x1b\x1b' ++ * # spidev_test -D /dev/spidev2.0 -p $suspend # or $reboot, $poweroff, $halt ++ */ ++ ++#include <linux/completion.h> ++#include <linux/module.h> ++#include <linux/reboot.h> ++#include <linux/suspend.h> ++#include <linux/spi/spi.h> ++ ++/* ++ * The numbers are chosen to display something human-readable on two 7-segment ++ * displays connected to two 74HC595 shift registers ++ */ ++#define CMD_REBOOT 0x7c50 /* rb */ ++#define CMD_POWEROFF 0x713f /* OF */ ++#define CMD_HALT 0x3876 /* HL */ ++#define CMD_SUSPEND 0x1b1b /* ZZ */ ++ ++struct spi_slave_system_control_priv { ++ struct spi_device *spi; ++ struct completion finished; ++ struct spi_transfer xfer; ++ struct spi_message msg; ++ __be16 cmd; ++}; ++ ++static ++int spi_slave_system_control_submit(struct spi_slave_system_control_priv *priv); ++ ++static void spi_slave_system_control_complete(void *arg) ++{ ++ struct spi_slave_system_control_priv *priv = arg; ++ u16 cmd; ++ int ret; ++ ++ if (priv->msg.status) ++ goto terminate; ++ ++ cmd = be16_to_cpu(priv->cmd); ++ switch (cmd) { ++ case CMD_REBOOT: ++ dev_info(&priv->spi->dev, "Rebooting system...\n"); ++ kernel_restart(NULL); ++ ++ case CMD_POWEROFF: ++ dev_info(&priv->spi->dev, "Powering off system...\n"); ++ kernel_power_off(); ++ break; ++ ++ case CMD_HALT: ++ dev_info(&priv->spi->dev, "Halting system...\n"); ++ kernel_halt(); ++ break; ++ ++ case CMD_SUSPEND: ++ dev_info(&priv->spi->dev, "Suspending system...\n"); ++ pm_suspend(PM_SUSPEND_MEM); ++ break; ++ ++ default: ++ dev_warn(&priv->spi->dev, "Unknown command 0x%x\n", cmd); ++ break; ++ } ++ ++ ret = spi_slave_system_control_submit(priv); ++ if (ret) ++ goto terminate; ++ ++ return; ++ ++terminate: ++ dev_info(&priv->spi->dev, "Terminating\n"); ++ complete(&priv->finished); ++} ++ ++static ++int spi_slave_system_control_submit(struct spi_slave_system_control_priv *priv) ++{ ++ int ret; ++ ++ spi_message_init_with_transfers(&priv->msg, &priv->xfer, 1); ++ ++ priv->msg.complete = spi_slave_system_control_complete; ++ priv->msg.context = priv; ++ ++ ret = spi_async(priv->spi, &priv->msg); ++ if (ret) ++ dev_err(&priv->spi->dev, "spi_async() failed %d\n", ret); ++ ++ return ret; ++} ++ ++static int spi_slave_system_control_probe(struct spi_device *spi) ++{ ++ struct spi_slave_system_control_priv *priv; ++ int ret; ++ ++ priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ priv->spi = spi; ++ init_completion(&priv->finished); ++ priv->xfer.rx_buf = &priv->cmd; ++ priv->xfer.len = sizeof(priv->cmd); ++ ++ ret = spi_slave_system_control_submit(priv); ++ if (ret) ++ return ret; ++ ++ spi_set_drvdata(spi, priv); ++ return 0; ++} ++ ++static int spi_slave_system_control_remove(struct spi_device *spi) ++{ ++ struct spi_slave_system_control_priv *priv = spi_get_drvdata(spi); ++ ++ spi_slave_abort(spi); ++ wait_for_completion(&priv->finished); ++ return 0; ++} ++ ++static struct spi_driver spi_slave_system_control_driver = { ++ .driver = { ++ .name = "spi-slave-system-control", ++ }, ++ .probe = spi_slave_system_control_probe, ++ .remove = spi_slave_system_control_remove, ++}; ++module_spi_driver(spi_slave_system_control_driver); ++ ++MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>"); ++MODULE_DESCRIPTION("SPI slave handler controlling system state"); ++MODULE_LICENSE("GPL v2"); +-- +1.7.10.4 diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0089-spi-Generalize-SPI-master-to-controller.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0089-spi-Generalize-SPI-master-to-controller.patch new file mode 100644 index 0000000..2c1e0eb --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0089-spi-Generalize-SPI-master-to-controller.patch @@ -0,0 +1,3048 @@ +From 5767a2cd113534b904593d143175e1ba71ea6555 Mon Sep 17 00:00:00 2001 +From: Geert Uytterhoeven <geert+renesas@glider.be> +Date: Wed, 3 May 2017 17:28:39 +0200 +Subject: [PATCH 7/7] spi: Generalize SPI "master" to "controller" + +Now struct spi_master is used for both SPI master and slave controllers, +it makes sense to rename it to struct spi_controller, and replace +"master" by "controller" where appropriate. + +For now this conversion is done for SPI core infrastructure only. +Wrappers are provided for backwards compatibility, until all SPI drivers +have been converted. + +Noteworthy details: + - SPI_MASTER_GPIO_SS is retained, as it only makes sense for SPI + master controllers, + - spi_busnum_to_master() is kept, as it looks up masters only, + - A new field spi_device.controller is added, but spi_device.master is + retained for compatibility (both are always initialized by + spi_alloc_device()), + - spi_flash_read() is used by SPI masters only. + +Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> +--- + drivers/spi/spi.c | 1073 ++++++++++++++++++++++---------------------- + include/linux/spi/spi.h | 197 ++++---- + include/trace/events/spi.h | 26 +- + 3 files changed, 664 insertions(+), 632 deletions(-) + +diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c +index a403e3a..cd2e271 100644 +--- a/drivers/spi/spi.c ++++ b/drivers/spi/spi.c +@@ -46,11 +46,11 @@ static void spidev_release(struct device *dev) + { + struct spi_device *spi = to_spi_device(dev); + +- /* spi masters may cleanup for released devices */ +- if (spi->master->cleanup) +- spi->master->cleanup(spi); ++ /* spi controllers may cleanup for released devices */ ++ if (spi->controller->cleanup) ++ spi->controller->cleanup(spi); + +- spi_master_put(spi->master); ++ spi_controller_put(spi->controller); + kfree(spi); + } + +@@ -69,17 +69,17 @@ static void spidev_release(struct device *dev) + static DEVICE_ATTR_RO(modalias); + + #define SPI_STATISTICS_ATTRS(field, file) \ +-static ssize_t spi_master_##field##_show(struct device *dev, \ +- struct device_attribute *attr, \ +- char *buf) \ ++static ssize_t spi_controller_##field##_show(struct device *dev, \ ++ struct device_attribute *attr, \ ++ char *buf) \ + { \ +- struct spi_master *master = container_of(dev, \ +- struct spi_master, dev); \ +- return spi_statistics_##field##_show(&master->statistics, buf); \ ++ struct spi_controller *ctlr = container_of(dev, \ ++ struct spi_controller, dev); \ ++ return spi_statistics_##field##_show(&ctlr->statistics, buf); \ + } \ +-static struct device_attribute dev_attr_spi_master_##field = { \ ++static struct device_attribute dev_attr_spi_controller_##field = { \ + .attr = { .name = file, .mode = S_IRUGO }, \ +- .show = spi_master_##field##_show, \ ++ .show = spi_controller_##field##_show, \ + }; \ + static ssize_t spi_device_##field##_show(struct device *dev, \ + struct device_attribute *attr, \ +@@ -199,51 +199,51 @@ static void spidev_release(struct device *dev) + NULL, + }; + +-static struct attribute *spi_master_statistics_attrs[] = { +- &dev_attr_spi_master_messages.attr, +- &dev_attr_spi_master_transfers.attr, +- &dev_attr_spi_master_errors.attr, +- &dev_attr_spi_master_timedout.attr, +- &dev_attr_spi_master_spi_sync.attr, +- &dev_attr_spi_master_spi_sync_immediate.attr, +- &dev_attr_spi_master_spi_async.attr, +- &dev_attr_spi_master_bytes.attr, +- &dev_attr_spi_master_bytes_rx.attr, +- &dev_attr_spi_master_bytes_tx.attr, +- &dev_attr_spi_master_transfer_bytes_histo0.attr, +- &dev_attr_spi_master_transfer_bytes_histo1.attr, +- &dev_attr_spi_master_transfer_bytes_histo2.attr, +- &dev_attr_spi_master_transfer_bytes_histo3.attr, +- &dev_attr_spi_master_transfer_bytes_histo4.attr, +- &dev_attr_spi_master_transfer_bytes_histo5.attr, +- &dev_attr_spi_master_transfer_bytes_histo6.attr, +- &dev_attr_spi_master_transfer_bytes_histo7.attr, +- &dev_attr_spi_master_transfer_bytes_histo8.attr, +- &dev_attr_spi_master_transfer_bytes_histo9.attr, +- &dev_attr_spi_master_transfer_bytes_histo10.attr, +- &dev_attr_spi_master_transfer_bytes_histo11.attr, +- &dev_attr_spi_master_transfer_bytes_histo12.attr, +- &dev_attr_spi_master_transfer_bytes_histo13.attr, +- &dev_attr_spi_master_transfer_bytes_histo14.attr, +- &dev_attr_spi_master_transfer_bytes_histo15.attr, +- &dev_attr_spi_master_transfer_bytes_histo16.attr, +- &dev_attr_spi_master_transfers_split_maxsize.attr, ++static struct attribute *spi_controller_statistics_attrs[] = { ++ &dev_attr_spi_controller_messages.attr, ++ &dev_attr_spi_controller_transfers.attr, ++ &dev_attr_spi_controller_errors.attr, ++ &dev_attr_spi_controller_timedout.attr, ++ &dev_attr_spi_controller_spi_sync.attr, ++ &dev_attr_spi_controller_spi_sync_immediate.attr, ++ &dev_attr_spi_controller_spi_async.attr, ++ &dev_attr_spi_controller_bytes.attr, ++ &dev_attr_spi_controller_bytes_rx.attr, ++ &dev_attr_spi_controller_bytes_tx.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo0.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo1.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo2.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo3.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo4.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo5.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo6.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo7.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo8.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo9.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo10.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo11.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo12.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo13.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo14.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo15.attr, ++ &dev_attr_spi_controller_transfer_bytes_histo16.attr, ++ &dev_attr_spi_controller_transfers_split_maxsize.attr, + NULL, + }; + +-static const struct attribute_group spi_master_statistics_group = { ++static const struct attribute_group spi_controller_statistics_group = { + .name = "statistics", +- .attrs = spi_master_statistics_attrs, ++ .attrs = spi_controller_statistics_attrs, + }; + + static const struct attribute_group *spi_master_groups[] = { +- &spi_master_statistics_group, ++ &spi_controller_statistics_group, + NULL, + }; + + void spi_statistics_add_transfer_stats(struct spi_statistics *stats, + struct spi_transfer *xfer, +- struct spi_master *master) ++ struct spi_controller *ctlr) + { + unsigned long flags; + int l2len = min(fls(xfer->len), SPI_STATISTICS_HISTO_SIZE) - 1; +@@ -258,10 +258,10 @@ void spi_statistics_add_transfer_stats(struct spi_statistics *stats, + + stats->bytes += xfer->len; + if ((xfer->tx_buf) && +- (xfer->tx_buf != master->dummy_tx)) ++ (xfer->tx_buf != ctlr->dummy_tx)) + stats->bytes_tx += xfer->len; + if ((xfer->rx_buf) && +- (xfer->rx_buf != master->dummy_rx)) ++ (xfer->rx_buf != ctlr->dummy_rx)) + stats->bytes_rx += xfer->len; + + spin_unlock_irqrestore(&stats->lock, flags); +@@ -403,7 +403,7 @@ int __spi_register_driver(struct module *owner, struct spi_driver *sdrv) + /*-------------------------------------------------------------------------*/ + + /* SPI devices should normally not be created by SPI device drivers; that +- * would make them board-specific. Similarly with SPI master drivers. ++ * would make them board-specific. Similarly with SPI controller drivers. + * Device registration normally goes into like arch/.../mach.../board-YYY.c + * with other readonly (flashable) information about mainboard devices. + */ +@@ -414,17 +414,17 @@ struct boardinfo { + }; + + static LIST_HEAD(board_list); +-static LIST_HEAD(spi_master_list); ++static LIST_HEAD(spi_controller_list); + + /* + * Used to protect add/del opertion for board_info list and +- * spi_master list, and their matching process ++ * spi_controller list, and their matching process + */ + static DEFINE_MUTEX(board_lock); + + /** + * spi_alloc_device - Allocate a new SPI device +- * @master: Controller to which device is connected ++ * @ctlr: Controller to which device is connected + * Context: can sleep + * + * Allows a driver to allocate and initialize a spi_device without +@@ -433,27 +433,27 @@ struct boardinfo { + * spi_add_device() on it. + * + * Caller is responsible to call spi_add_device() on the returned +- * spi_device structure to add it to the SPI master. If the caller ++ * spi_device structure to add it to the SPI controller. If the caller + * needs to discard the spi_device without adding it, then it should + * call spi_dev_put() on it. + * + * Return: a pointer to the new device, or NULL. + */ +-struct spi_device *spi_alloc_device(struct spi_master *master) ++struct spi_device *spi_alloc_device(struct spi_controller *ctlr) + { + struct spi_device *spi; + +- if (!spi_master_get(master)) ++ if (!spi_controller_get(ctlr)) + return NULL; + + spi = kzalloc(sizeof(*spi), GFP_KERNEL); + if (!spi) { +- spi_master_put(master); ++ spi_controller_put(ctlr); + return NULL; + } + +- spi->master = master; +- spi->dev.parent = &master->dev; ++ spi->master = spi->controller = ctlr; ++ spi->dev.parent = &ctlr->dev; + spi->dev.bus = &spi_bus_type; + spi->dev.release = spidev_release; + spi->cs_gpio = -ENOENT; +@@ -474,7 +474,7 @@ static void spi_dev_set_name(struct spi_device *spi) + return; + } + +- dev_set_name(&spi->dev, "%s.%u", dev_name(&spi->master->dev), ++ dev_set_name(&spi->dev, "%s.%u", dev_name(&spi->controller->dev), + spi->chip_select); + } + +@@ -483,7 +483,7 @@ static int spi_dev_check(struct device *dev, void *data) + struct spi_device *spi = to_spi_device(dev); + struct spi_device *new_spi = data; + +- if (spi->master == new_spi->master && ++ if (spi->controller == new_spi->controller && + spi->chip_select == new_spi->chip_select) + return -EBUSY; + return 0; +@@ -501,15 +501,14 @@ static int spi_dev_check(struct device *dev, void *data) + int spi_add_device(struct spi_device *spi) + { + static DEFINE_MUTEX(spi_add_lock); +- struct spi_master *master = spi->master; +- struct device *dev = master->dev.parent; ++ struct spi_controller *ctlr = spi->controller; ++ struct device *dev = ctlr->dev.parent; + int status; + + /* Chipselects are numbered 0..max; validate. */ +- if (spi->chip_select >= master->num_chipselect) { +- dev_err(dev, "cs%d >= max %d\n", +- spi->chip_select, +- master->num_chipselect); ++ if (spi->chip_select >= ctlr->num_chipselect) { ++ dev_err(dev, "cs%d >= max %d\n", spi->chip_select, ++ ctlr->num_chipselect); + return -EINVAL; + } + +@@ -529,8 +528,8 @@ int spi_add_device(struct spi_device *spi) + goto done; + } + +- if (master->cs_gpios) +- spi->cs_gpio = master->cs_gpios[spi->chip_select]; ++ if (ctlr->cs_gpios) ++ spi->cs_gpio = ctlr->cs_gpios[spi->chip_select]; + + /* Drivers may modify this initial i/o setup, but will + * normally rely on the device being setup. Devices +@@ -559,7 +558,7 @@ int spi_add_device(struct spi_device *spi) + + /** + * spi_new_device - instantiate one new SPI device +- * @master: Controller to which device is connected ++ * @ctlr: Controller to which device is connected + * @chip: Describes the SPI device + * Context: can sleep + * +@@ -571,7 +570,7 @@ int spi_add_device(struct spi_device *spi) + * + * Return: the new device, or NULL. + */ +-struct spi_device *spi_new_device(struct spi_master *master, ++struct spi_device *spi_new_device(struct spi_controller *ctlr, + struct spi_board_info *chip) + { + struct spi_device *proxy; +@@ -584,7 +583,7 @@ struct spi_device *spi_new_device(struct spi_master *master, + * suggests syslogged diagnostics are best here (ugh). + */ + +- proxy = spi_alloc_device(master); ++ proxy = spi_alloc_device(ctlr); + if (!proxy) + return NULL; + +@@ -614,7 +613,7 @@ struct spi_device *spi_new_device(struct spi_master *master, + * @spi: spi_device to unregister + * + * Start making the passed SPI device vanish. Normally this would be handled +- * by spi_unregister_master(). ++ * by spi_unregister_controller(). + */ + void spi_unregister_device(struct spi_device *spi) + { +@@ -629,17 +628,17 @@ void spi_unregister_device(struct spi_device *spi) + } + EXPORT_SYMBOL_GPL(spi_unregister_device); + +-static void spi_match_master_to_boardinfo(struct spi_master *master, +- struct spi_board_info *bi) ++static void spi_match_controller_to_boardinfo(struct spi_controller *ctlr, ++ struct spi_board_info *bi) + { + struct spi_device *dev; + +- if (master->bus_num != bi->bus_num) ++ if (ctlr->bus_num != bi->bus_num) + return; + +- dev = spi_new_device(master, bi); ++ dev = spi_new_device(ctlr, bi); + if (!dev) +- dev_err(master->dev.parent, "can't create new device for %s\n", ++ dev_err(ctlr->dev.parent, "can't create new device for %s\n", + bi->modalias); + } + +@@ -677,13 +676,14 @@ int spi_register_board_info(struct spi_board_info const *info, unsigned n) + return -ENOMEM; + + for (i = 0; i < n; i++, bi++, info++) { +- struct spi_master *master; ++ struct spi_controller *ctlr; + + memcpy(&bi->board_info, info, sizeof(*info)); + mutex_lock(&board_lock); + list_add_tail(&bi->list, &board_list); +- list_for_each_entry(master, &spi_master_list, list) +- spi_match_master_to_boardinfo(master, &bi->board_info); ++ list_for_each_entry(ctlr, &spi_controller_list, list) ++ spi_match_controller_to_boardinfo(ctlr, ++ &bi->board_info); + mutex_unlock(&board_lock); + } + +@@ -699,12 +699,12 @@ static void spi_set_cs(struct spi_device *spi, bool enable) + + if (gpio_is_valid(spi->cs_gpio)) + gpio_set_value(spi->cs_gpio, !enable); +- else if (spi->master->set_cs) +- spi->master->set_cs(spi, !enable); ++ else if (spi->controller->set_cs) ++ spi->controller->set_cs(spi, !enable); + } + + #ifdef CONFIG_HAS_DMA +-static int spi_map_buf(struct spi_master *master, struct device *dev, ++static int spi_map_buf(struct spi_controller *ctlr, struct device *dev, + struct sg_table *sgt, void *buf, size_t len, + enum dma_data_direction dir) + { +@@ -728,7 +728,7 @@ static int spi_map_buf(struct spi_master *master, struct device *dev, + desc_len = min_t(int, max_seg_size, PAGE_SIZE); + sgs = DIV_ROUND_UP(len + offset_in_page(buf), desc_len); + } else if (virt_addr_valid(buf)) { +- desc_len = min_t(int, max_seg_size, master->max_dma_len); ++ desc_len = min_t(int, max_seg_size, ctlr->max_dma_len); + sgs = DIV_ROUND_UP(len, desc_len); + } else { + return -EINVAL; +@@ -776,7 +776,7 @@ static int spi_map_buf(struct spi_master *master, struct device *dev, + return 0; + } + +-static void spi_unmap_buf(struct spi_master *master, struct device *dev, ++static void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev, + struct sg_table *sgt, enum dma_data_direction dir) + { + if (sgt->orig_nents) { +@@ -785,31 +785,31 @@ static void spi_unmap_buf(struct spi_master *master, struct device *dev, + } + } + +-static int __spi_map_msg(struct spi_master *master, struct spi_message *msg) ++static int __spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg) + { + struct device *tx_dev, *rx_dev; + struct spi_transfer *xfer; + int ret; + +- if (!master->can_dma) ++ if (!ctlr->can_dma) + return 0; + +- if (master->dma_tx) +- tx_dev = master->dma_tx->device->dev; ++ if (ctlr->dma_tx) ++ tx_dev = ctlr->dma_tx->device->dev; + else +- tx_dev = &master->dev; ++ tx_dev = &ctlr->dev; + +- if (master->dma_rx) +- rx_dev = master->dma_rx->device->dev; ++ if (ctlr->dma_rx) ++ rx_dev = ctlr->dma_rx->device->dev; + else +- rx_dev = &master->dev; ++ rx_dev = &ctlr->dev; + + list_for_each_entry(xfer, &msg->transfers, transfer_list) { +- if (!master->can_dma(master, msg->spi, xfer)) ++ if (!ctlr->can_dma(ctlr, msg->spi, xfer)) + continue; + + if (xfer->tx_buf != NULL) { +- ret = spi_map_buf(master, tx_dev, &xfer->tx_sg, ++ ret = spi_map_buf(ctlr, tx_dev, &xfer->tx_sg, + (void *)xfer->tx_buf, xfer->len, + DMA_TO_DEVICE); + if (ret != 0) +@@ -817,79 +817,78 @@ static int __spi_map_msg(struct spi_master *master, struct spi_message *msg) + } + + if (xfer->rx_buf != NULL) { +- ret = spi_map_buf(master, rx_dev, &xfer->rx_sg, ++ ret = spi_map_buf(ctlr, rx_dev, &xfer->rx_sg, + xfer->rx_buf, xfer->len, + DMA_FROM_DEVICE); + if (ret != 0) { +- spi_unmap_buf(master, tx_dev, &xfer->tx_sg, ++ spi_unmap_buf(ctlr, tx_dev, &xfer->tx_sg, + DMA_TO_DEVICE); + return ret; + } + } + } + +- master->cur_msg_mapped = true; ++ ctlr->cur_msg_mapped = true; + + return 0; + } + +-static int __spi_unmap_msg(struct spi_master *master, struct spi_message *msg) ++static int __spi_unmap_msg(struct spi_controller *ctlr, struct spi_message *msg) + { + struct spi_transfer *xfer; + struct device *tx_dev, *rx_dev; + +- if (!master->cur_msg_mapped || !master->can_dma) ++ if (!ctlr->cur_msg_mapped || !ctlr->can_dma) + return 0; + +- if (master->dma_tx) +- tx_dev = master->dma_tx->device->dev; ++ if (ctlr->dma_tx) ++ tx_dev = ctlr->dma_tx->device->dev; + else +- tx_dev = &master->dev; ++ tx_dev = &ctlr->dev; + +- if (master->dma_rx) +- rx_dev = master->dma_rx->device->dev; ++ if (ctlr->dma_rx) ++ rx_dev = ctlr->dma_rx->device->dev; + else +- rx_dev = &master->dev; ++ rx_dev = &ctlr->dev; + + list_for_each_entry(xfer, &msg->transfers, transfer_list) { +- if (!master->can_dma(master, msg->spi, xfer)) ++ if (!ctlr->can_dma(ctlr, msg->spi, xfer)) + continue; + +- spi_unmap_buf(master, rx_dev, &xfer->rx_sg, DMA_FROM_DEVICE); +- spi_unmap_buf(master, tx_dev, &xfer->tx_sg, DMA_TO_DEVICE); ++ spi_unmap_buf(ctlr, rx_dev, &xfer->rx_sg, DMA_FROM_DEVICE); ++ spi_unmap_buf(ctlr, tx_dev, &xfer->tx_sg, DMA_TO_DEVICE); + } + + return 0; + } + #else /* !CONFIG_HAS_DMA */ +-static inline int spi_map_buf(struct spi_master *master, +- struct device *dev, struct sg_table *sgt, +- void *buf, size_t len, ++static inline int spi_map_buf(struct spi_controller *ctlr, struct device *dev, ++ struct sg_table *sgt, void *buf, size_t len, + enum dma_data_direction dir) + { + return -EINVAL; + } + +-static inline void spi_unmap_buf(struct spi_master *master, ++static inline void spi_unmap_buf(struct spi_controller *ctlr, + struct device *dev, struct sg_table *sgt, + enum dma_data_direction dir) + { + } + +-static inline int __spi_map_msg(struct spi_master *master, ++static inline int __spi_map_msg(struct spi_controller *ctlr, + struct spi_message *msg) + { + return 0; + } + +-static inline int __spi_unmap_msg(struct spi_master *master, ++static inline int __spi_unmap_msg(struct spi_controller *ctlr, + struct spi_message *msg) + { + return 0; + } + #endif /* !CONFIG_HAS_DMA */ + +-static inline int spi_unmap_msg(struct spi_master *master, ++static inline int spi_unmap_msg(struct spi_controller *ctlr, + struct spi_message *msg) + { + struct spi_transfer *xfer; +@@ -899,63 +898,63 @@ static inline int spi_unmap_msg(struct spi_master *master, + * Restore the original value of tx_buf or rx_buf if they are + * NULL. + */ +- if (xfer->tx_buf == master->dummy_tx) ++ if (xfer->tx_buf == ctlr->dummy_tx) + xfer->tx_buf = NULL; +- if (xfer->rx_buf == master->dummy_rx) ++ if (xfer->rx_buf == ctlr->dummy_rx) + xfer->rx_buf = NULL; + } + +- return __spi_unmap_msg(master, msg); ++ return __spi_unmap_msg(ctlr, msg); + } + +-static int spi_map_msg(struct spi_master *master, struct spi_message *msg) ++static int spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg) + { + struct spi_transfer *xfer; + void *tmp; + unsigned int max_tx, max_rx; + +- if (master->flags & (SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX)) { ++ if (ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) { + max_tx = 0; + max_rx = 0; + + list_for_each_entry(xfer, &msg->transfers, transfer_list) { +- if ((master->flags & SPI_MASTER_MUST_TX) && ++ if ((ctlr->flags & SPI_CONTROLLER_MUST_TX) && + !xfer->tx_buf) + max_tx = max(xfer->len, max_tx); +- if ((master->flags & SPI_MASTER_MUST_RX) && ++ if ((ctlr->flags & SPI_CONTROLLER_MUST_RX) && + !xfer->rx_buf) + max_rx = max(xfer->len, max_rx); + } + + if (max_tx) { +- tmp = krealloc(master->dummy_tx, max_tx, ++ tmp = krealloc(ctlr->dummy_tx, max_tx, + GFP_KERNEL | GFP_DMA); + if (!tmp) + return -ENOMEM; +- master->dummy_tx = tmp; ++ ctlr->dummy_tx = tmp; + memset(tmp, 0, max_tx); + } + + if (max_rx) { +- tmp = krealloc(master->dummy_rx, max_rx, ++ tmp = krealloc(ctlr->dummy_rx, max_rx, + GFP_KERNEL | GFP_DMA); + if (!tmp) + return -ENOMEM; +- master->dummy_rx = tmp; ++ ctlr->dummy_rx = tmp; + } + + if (max_tx || max_rx) { + list_for_each_entry(xfer, &msg->transfers, + transfer_list) { + if (!xfer->tx_buf) +- xfer->tx_buf = master->dummy_tx; ++ xfer->tx_buf = ctlr->dummy_tx; + if (!xfer->rx_buf) +- xfer->rx_buf = master->dummy_rx; ++ xfer->rx_buf = ctlr->dummy_rx; + } + } + } + +- return __spi_map_msg(master, msg); ++ return __spi_map_msg(ctlr, msg); + } + + /* +@@ -965,14 +964,14 @@ static int spi_map_msg(struct spi_master *master, struct spi_message *msg) + * drivers which implement a transfer_one() operation. It provides + * standard handling of delays and chip select management. + */ +-static int spi_transfer_one_message(struct spi_master *master, ++static int spi_transfer_one_message(struct spi_controller *ctlr, + struct spi_message *msg) + { + struct spi_transfer *xfer; + bool keep_cs = false; + int ret = 0; + unsigned long long ms = 1; +- struct spi_statistics *statm = &master->statistics; ++ struct spi_statistics *statm = &ctlr->statistics; + struct spi_statistics *stats = &msg->spi->statistics; + + spi_set_cs(msg->spi, true); +@@ -983,13 +982,13 @@ static int spi_transfer_one_message(struct spi_master *master, + list_for_each_entry(xfer, &msg->transfers, transfer_list) { + trace_spi_transfer_start(msg, xfer); + +- spi_statistics_add_transfer_stats(statm, xfer, master); +- spi_statistics_add_transfer_stats(stats, xfer, master); ++ spi_statistics_add_transfer_stats(statm, xfer, ctlr); ++ spi_statistics_add_transfer_stats(stats, xfer, ctlr); + + if (xfer->tx_buf || xfer->rx_buf) { +- reinit_completion(&master->xfer_completion); ++ reinit_completion(&ctlr->xfer_completion); + +- ret = master->transfer_one(master, msg->spi, xfer); ++ ret = ctlr->transfer_one(ctlr, msg->spi, xfer); + if (ret < 0) { + SPI_STATISTICS_INCREMENT_FIELD(statm, + errors); +@@ -1009,7 +1008,7 @@ static int spi_transfer_one_message(struct spi_master *master, + if (ms > UINT_MAX) + ms = UINT_MAX; + +- ms = wait_for_completion_timeout(&master->xfer_completion, ++ ms = wait_for_completion_timeout(&ctlr->xfer_completion, + msecs_to_jiffies(ms)); + } + +@@ -1058,33 +1057,33 @@ static int spi_transfer_one_message(struct spi_master *master, + if (msg->status == -EINPROGRESS) + msg->status = ret; + +- if (msg->status && master->handle_err) +- master->handle_err(master, msg); ++ if (msg->status && ctlr->handle_err) ++ ctlr->handle_err(ctlr, msg); + +- spi_res_release(master, msg); ++ spi_res_release(ctlr, msg); + +- spi_finalize_current_message(master); ++ spi_finalize_current_message(ctlr); + + return ret; + } + + /** + * spi_finalize_current_transfer - report completion of a transfer +- * @master: the master reporting completion ++ * @ctlr: the controller reporting completion + * + * Called by SPI drivers using the core transfer_one_message() + * implementation to notify it that the current interrupt driven + * transfer has finished and the next one may be scheduled. + */ +-void spi_finalize_current_transfer(struct spi_master *master) ++void spi_finalize_current_transfer(struct spi_controller *ctlr) + { +- complete(&master->xfer_completion); ++ complete(&ctlr->xfer_completion); + } + EXPORT_SYMBOL_GPL(spi_finalize_current_transfer); + + /** + * __spi_pump_messages - function which processes spi message queue +- * @master: master to process queue for ++ * @ctlr: controller to process queue for + * @in_kthread: true if we are in the context of the message pump thread + * + * This function checks if there is any spi message in the queue that +@@ -1095,136 +1094,136 @@ void spi_finalize_current_transfer(struct spi_master *master) + * inside spi_sync(); the queue extraction handling at the top of the + * function should deal with this safely. + */ +-static void __spi_pump_messages(struct spi_master *master, bool in_kthread) ++static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread) + { + unsigned long flags; + bool was_busy = false; + int ret; + + /* Lock queue */ +- spin_lock_irqsave(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); + + /* Make sure we are not already running a message */ +- if (master->cur_msg) { +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ if (ctlr->cur_msg) { ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return; + } + + /* If another context is idling the device then defer */ +- if (master->idling) { +- kthread_queue_work(&master->kworker, &master->pump_messages); +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ if (ctlr->idling) { ++ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages); ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return; + } + + /* Check if the queue is idle */ +- if (list_empty(&master->queue) || !master->running) { +- if (!master->busy) { +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ if (list_empty(&ctlr->queue) || !ctlr->running) { ++ if (!ctlr->busy) { ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return; + } + + /* Only do teardown in the thread */ + if (!in_kthread) { +- kthread_queue_work(&master->kworker, +- &master->pump_messages); +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ kthread_queue_work(&ctlr->kworker, ++ &ctlr->pump_messages); ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return; + } + +- master->busy = false; +- master->idling = true; +- spin_unlock_irqrestore(&master->queue_lock, flags); +- +- kfree(master->dummy_rx); +- master->dummy_rx = NULL; +- kfree(master->dummy_tx); +- master->dummy_tx = NULL; +- if (master->unprepare_transfer_hardware && +- master->unprepare_transfer_hardware(master)) +- dev_err(&master->dev, ++ ctlr->busy = false; ++ ctlr->idling = true; ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); ++ ++ kfree(ctlr->dummy_rx); ++ ctlr->dummy_rx = NULL; ++ kfree(ctlr->dummy_tx); ++ ctlr->dummy_tx = NULL; ++ if (ctlr->unprepare_transfer_hardware && ++ ctlr->unprepare_transfer_hardware(ctlr)) ++ dev_err(&ctlr->dev, + "failed to unprepare transfer hardware\n"); +- if (master->auto_runtime_pm) { +- pm_runtime_mark_last_busy(master->dev.parent); +- pm_runtime_put_autosuspend(master->dev.parent); ++ if (ctlr->auto_runtime_pm) { ++ pm_runtime_mark_last_busy(ctlr->dev.parent); ++ pm_runtime_put_autosuspend(ctlr->dev.parent); + } +- trace_spi_master_idle(master); ++ trace_spi_controller_idle(ctlr); + +- spin_lock_irqsave(&master->queue_lock, flags); +- master->idling = false; +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); ++ ctlr->idling = false; ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return; + } + + /* Extract head of queue */ +- master->cur_msg = +- list_first_entry(&master->queue, struct spi_message, queue); ++ ctlr->cur_msg = ++ list_first_entry(&ctlr->queue, struct spi_message, queue); + +- list_del_init(&master->cur_msg->queue); +- if (master->busy) ++ list_del_init(&ctlr->cur_msg->queue); ++ if (ctlr->busy) + was_busy = true; + else +- master->busy = true; +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ ctlr->busy = true; ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + +- mutex_lock(&master->io_mutex); ++ mutex_lock(&ctlr->io_mutex); + +- if (!was_busy && master->auto_runtime_pm) { +- ret = pm_runtime_get_sync(master->dev.parent); ++ if (!was_busy && ctlr->auto_runtime_pm) { ++ ret = pm_runtime_get_sync(ctlr->dev.parent); + if (ret < 0) { +- dev_err(&master->dev, "Failed to power device: %d\n", ++ dev_err(&ctlr->dev, "Failed to power device: %d\n", + ret); +- mutex_unlock(&master->io_mutex); ++ mutex_unlock(&ctlr->io_mutex); + return; + } + } + + if (!was_busy) +- trace_spi_master_busy(master); ++ trace_spi_controller_busy(ctlr); + +- if (!was_busy && master->prepare_transfer_hardware) { +- ret = master->prepare_transfer_hardware(master); ++ if (!was_busy && ctlr->prepare_transfer_hardware) { ++ ret = ctlr->prepare_transfer_hardware(ctlr); + if (ret) { +- dev_err(&master->dev, ++ dev_err(&ctlr->dev, + "failed to prepare transfer hardware\n"); + +- if (master->auto_runtime_pm) +- pm_runtime_put(master->dev.parent); +- mutex_unlock(&master->io_mutex); ++ if (ctlr->auto_runtime_pm) ++ pm_runtime_put(ctlr->dev.parent); ++ mutex_unlock(&ctlr->io_mutex); + return; + } + } + +- trace_spi_message_start(master->cur_msg); ++ trace_spi_message_start(ctlr->cur_msg); + +- if (master->prepare_message) { +- ret = master->prepare_message(master, master->cur_msg); ++ if (ctlr->prepare_message) { ++ ret = ctlr->prepare_message(ctlr, ctlr->cur_msg); + if (ret) { +- dev_err(&master->dev, +- "failed to prepare message: %d\n", ret); +- master->cur_msg->status = ret; +- spi_finalize_current_message(master); ++ dev_err(&ctlr->dev, "failed to prepare message: %d\n", ++ ret); ++ ctlr->cur_msg->status = ret; ++ spi_finalize_current_message(ctlr); + goto out; + } +- master->cur_msg_prepared = true; ++ ctlr->cur_msg_prepared = true; + } + +- ret = spi_map_msg(master, master->cur_msg); ++ ret = spi_map_msg(ctlr, ctlr->cur_msg); + if (ret) { +- master->cur_msg->status = ret; +- spi_finalize_current_message(master); ++ ctlr->cur_msg->status = ret; ++ spi_finalize_current_message(ctlr); + goto out; + } + +- ret = master->transfer_one_message(master, master->cur_msg); ++ ret = ctlr->transfer_one_message(ctlr, ctlr->cur_msg); + if (ret) { +- dev_err(&master->dev, ++ dev_err(&ctlr->dev, + "failed to transfer one message from queue\n"); + goto out; + } + + out: +- mutex_unlock(&master->io_mutex); ++ mutex_unlock(&ctlr->io_mutex); + + /* Prod the scheduler in case transfer_one() was busy waiting */ + if (!ret) +@@ -1233,44 +1232,43 @@ static void __spi_pump_messages(struct spi_master *master, bool in_kthread) + + /** + * spi_pump_messages - kthread work function which processes spi message queue +- * @work: pointer to kthread work struct contained in the master struct ++ * @work: pointer to kthread work struct contained in the controller struct + */ + static void spi_pump_messages(struct kthread_work *work) + { +- struct spi_master *master = +- container_of(work, struct spi_master, pump_messages); ++ struct spi_controller *ctlr = ++ container_of(work, struct spi_controller, pump_messages); + +- __spi_pump_messages(master, true); ++ __spi_pump_messages(ctlr, true); + } + +-static int spi_init_queue(struct spi_master *master) ++static int spi_init_queue(struct spi_controller *ctlr) + { + struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 }; + +- master->running = false; +- master->busy = false; ++ ctlr->running = false; ++ ctlr->busy = false; + +- kthread_init_worker(&master->kworker); +- master->kworker_task = kthread_run(kthread_worker_fn, +- &master->kworker, "%s", +- dev_name(&master->dev)); +- if (IS_ERR(master->kworker_task)) { +- dev_err(&master->dev, "failed to create message pump task\n"); +- return PTR_ERR(master->kworker_task); ++ kthread_init_worker(&ctlr->kworker); ++ ctlr->kworker_task = kthread_run(kthread_worker_fn, &ctlr->kworker, ++ "%s", dev_name(&ctlr->dev)); ++ if (IS_ERR(ctlr->kworker_task)) { ++ dev_err(&ctlr->dev, "failed to create message pump task\n"); ++ return PTR_ERR(ctlr->kworker_task); + } +- kthread_init_work(&master->pump_messages, spi_pump_messages); ++ kthread_init_work(&ctlr->pump_messages, spi_pump_messages); + + /* +- * Master config will indicate if this controller should run the ++ * Controller config will indicate if this controller should run the + * message pump with high (realtime) priority to reduce the transfer + * latency on the bus by minimising the delay between a transfer + * request and the scheduling of the message pump thread. Without this + * setting the message pump thread will remain at default priority. + */ +- if (master->rt) { +- dev_info(&master->dev, ++ if (ctlr->rt) { ++ dev_info(&ctlr->dev, + "will run message pump with realtime priority\n"); +- sched_setscheduler(master->kworker_task, SCHED_FIFO, ¶m); ++ sched_setscheduler(ctlr->kworker_task, SCHED_FIFO, ¶m); + } + + return 0; +@@ -1279,23 +1277,23 @@ static int spi_init_queue(struct spi_master *master) + /** + * spi_get_next_queued_message() - called by driver to check for queued + * messages +- * @master: the master to check for queued messages ++ * @ctlr: the controller to check for queued messages + * + * If there are more messages in the queue, the next message is returned from + * this call. + * + * Return: the next message in the queue, else NULL if the queue is empty. + */ +-struct spi_message *spi_get_next_queued_message(struct spi_master *master) ++struct spi_message *spi_get_next_queued_message(struct spi_controller *ctlr) + { + struct spi_message *next; + unsigned long flags; + + /* get a pointer to the next message, if any */ +- spin_lock_irqsave(&master->queue_lock, flags); +- next = list_first_entry_or_null(&master->queue, struct spi_message, ++ spin_lock_irqsave(&ctlr->queue_lock, flags); ++ next = list_first_entry_or_null(&ctlr->queue, struct spi_message, + queue); +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + + return next; + } +@@ -1303,36 +1301,36 @@ struct spi_message *spi_get_next_queued_message(struct spi_master *master) + + /** + * spi_finalize_current_message() - the current message is complete +- * @master: the master to return the message to ++ * @ctlr: the controller to return the message to + * + * Called by the driver to notify the core that the message in the front of the + * queue is complete and can be removed from the queue. + */ +-void spi_finalize_current_message(struct spi_master *master) ++void spi_finalize_current_message(struct spi_controller *ctlr) + { + struct spi_message *mesg; + unsigned long flags; + int ret; + +- spin_lock_irqsave(&master->queue_lock, flags); +- mesg = master->cur_msg; +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); ++ mesg = ctlr->cur_msg; ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + +- spi_unmap_msg(master, mesg); ++ spi_unmap_msg(ctlr, mesg); + +- if (master->cur_msg_prepared && master->unprepare_message) { +- ret = master->unprepare_message(master, mesg); ++ if (ctlr->cur_msg_prepared && ctlr->unprepare_message) { ++ ret = ctlr->unprepare_message(ctlr, mesg); + if (ret) { +- dev_err(&master->dev, +- "failed to unprepare message: %d\n", ret); ++ dev_err(&ctlr->dev, "failed to unprepare message: %d\n", ++ ret); + } + } + +- spin_lock_irqsave(&master->queue_lock, flags); +- master->cur_msg = NULL; +- master->cur_msg_prepared = false; +- kthread_queue_work(&master->kworker, &master->pump_messages); +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); ++ ctlr->cur_msg = NULL; ++ ctlr->cur_msg_prepared = false; ++ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages); ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + + trace_spi_message_done(mesg); + +@@ -1342,66 +1340,65 @@ void spi_finalize_current_message(struct spi_master *master) + } + EXPORT_SYMBOL_GPL(spi_finalize_current_message); + +-static int spi_start_queue(struct spi_master *master) ++static int spi_start_queue(struct spi_controller *ctlr) + { + unsigned long flags; + +- spin_lock_irqsave(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); + +- if (master->running || master->busy) { +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ if (ctlr->running || ctlr->busy) { ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return -EBUSY; + } + +- master->running = true; +- master->cur_msg = NULL; +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ ctlr->running = true; ++ ctlr->cur_msg = NULL; ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + +- kthread_queue_work(&master->kworker, &master->pump_messages); ++ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages); + + return 0; + } + +-static int spi_stop_queue(struct spi_master *master) ++static int spi_stop_queue(struct spi_controller *ctlr) + { + unsigned long flags; + unsigned limit = 500; + int ret = 0; + +- spin_lock_irqsave(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); + + /* + * This is a bit lame, but is optimized for the common execution path. +- * A wait_queue on the master->busy could be used, but then the common ++ * A wait_queue on the ctlr->busy could be used, but then the common + * execution path (pump_messages) would be required to call wake_up or + * friends on every SPI message. Do this instead. + */ +- while ((!list_empty(&master->queue) || master->busy) && limit--) { +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ while ((!list_empty(&ctlr->queue) || ctlr->busy) && limit--) { ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + usleep_range(10000, 11000); +- spin_lock_irqsave(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); + } + +- if (!list_empty(&master->queue) || master->busy) ++ if (!list_empty(&ctlr->queue) || ctlr->busy) + ret = -EBUSY; + else +- master->running = false; ++ ctlr->running = false; + +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + + if (ret) { +- dev_warn(&master->dev, +- "could not stop message queue\n"); ++ dev_warn(&ctlr->dev, "could not stop message queue\n"); + return ret; + } + return ret; + } + +-static int spi_destroy_queue(struct spi_master *master) ++static int spi_destroy_queue(struct spi_controller *ctlr) + { + int ret; + +- ret = spi_stop_queue(master); ++ ret = spi_stop_queue(ctlr); + + /* + * kthread_flush_worker will block until all work is done. +@@ -1410,12 +1407,12 @@ static int spi_destroy_queue(struct spi_master *master) + * return anyway. + */ + if (ret) { +- dev_err(&master->dev, "problem destroying queue\n"); ++ dev_err(&ctlr->dev, "problem destroying queue\n"); + return ret; + } + +- kthread_flush_worker(&master->kworker); +- kthread_stop(master->kworker_task); ++ kthread_flush_worker(&ctlr->kworker); ++ kthread_stop(ctlr->kworker_task); + + return 0; + } +@@ -1424,23 +1421,23 @@ static int __spi_queued_transfer(struct spi_device *spi, + struct spi_message *msg, + bool need_pump) + { +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + unsigned long flags; + +- spin_lock_irqsave(&master->queue_lock, flags); ++ spin_lock_irqsave(&ctlr->queue_lock, flags); + +- if (!master->running) { +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ if (!ctlr->running) { ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return -ESHUTDOWN; + } + msg->actual_length = 0; + msg->status = -EINPROGRESS; + +- list_add_tail(&msg->queue, &master->queue); +- if (!master->busy && need_pump) +- kthread_queue_work(&master->kworker, &master->pump_messages); ++ list_add_tail(&msg->queue, &ctlr->queue); ++ if (!ctlr->busy && need_pump) ++ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages); + +- spin_unlock_irqrestore(&master->queue_lock, flags); ++ spin_unlock_irqrestore(&ctlr->queue_lock, flags); + return 0; + } + +@@ -1456,31 +1453,31 @@ static int spi_queued_transfer(struct spi_device *spi, struct spi_message *msg) + return __spi_queued_transfer(spi, msg, true); + } + +-static int spi_master_initialize_queue(struct spi_master *master) ++static int spi_controller_initialize_queue(struct spi_controller *ctlr) + { + int ret; + +- master->transfer = spi_queued_transfer; +- if (!master->transfer_one_message) +- master->transfer_one_message = spi_transfer_one_message; ++ ctlr->transfer = spi_queued_transfer; ++ if (!ctlr->transfer_one_message) ++ ctlr->transfer_one_message = spi_transfer_one_message; + + /* Initialize and start queue */ +- ret = spi_init_queue(master); ++ ret = spi_init_queue(ctlr); + if (ret) { +- dev_err(&master->dev, "problem initializing queue\n"); ++ dev_err(&ctlr->dev, "problem initializing queue\n"); + goto err_init_queue; + } +- master->queued = true; +- ret = spi_start_queue(master); ++ ctlr->queued = true; ++ ret = spi_start_queue(ctlr); + if (ret) { +- dev_err(&master->dev, "problem starting queue\n"); ++ dev_err(&ctlr->dev, "problem starting queue\n"); + goto err_start_queue; + } + + return 0; + + err_start_queue: +- spi_destroy_queue(master); ++ spi_destroy_queue(ctlr); + err_init_queue: + return ret; + } +@@ -1489,16 +1486,16 @@ static int spi_master_initialize_queue(struct spi_master *master) + + #if defined(CONFIG_OF) + static struct spi_device * +-of_register_spi_device(struct spi_master *master, struct device_node *nc) ++of_register_spi_device(struct spi_controller *ctlr, struct device_node *nc) + { + struct spi_device *spi; + int rc; + u32 value; + + /* Alloc an spi_device */ +- spi = spi_alloc_device(master); ++ spi = spi_alloc_device(ctlr); + if (!spi) { +- dev_err(&master->dev, "spi_device alloc error for %s\n", ++ dev_err(&ctlr->dev, "spi_device alloc error for %s\n", + nc->full_name); + rc = -ENOMEM; + goto err_out; +@@ -1508,7 +1505,7 @@ static int spi_master_initialize_queue(struct spi_master *master) + rc = of_modalias_node(nc, spi->modalias, + sizeof(spi->modalias)); + if (rc < 0) { +- dev_err(&master->dev, "cannot find modalias for %s\n", ++ dev_err(&ctlr->dev, "cannot find modalias for %s\n", + nc->full_name); + goto err_out; + } +@@ -1537,7 +1534,7 @@ static int spi_master_initialize_queue(struct spi_master *master) + spi->mode |= SPI_TX_QUAD; + break; + default: +- dev_warn(&master->dev, ++ dev_warn(&ctlr->dev, + "spi-tx-bus-width %d not supported\n", + value); + break; +@@ -1555,35 +1552,36 @@ static int spi_master_initialize_queue(struct spi_master *master) + spi->mode |= SPI_RX_QUAD; + break; + default: +- dev_warn(&master->dev, ++ dev_warn(&ctlr->dev, + "spi-rx-bus-width %d not supported\n", + value); + break; + } + } + +- if (spi_controller_is_slave(master)) { ++ if (spi_controller_is_slave(ctlr)) { + if (strcmp(nc->name, "slave")) { +- dev_err(&master->dev, "%s is not called 'slave'\n", ++ dev_err(&ctlr->dev, "%s is not called 'slave'\n", + nc->full_name); +- return -EINVAL; ++ rc = -EINVAL; ++ goto err_out; + } +- return 0; + } + + /* Device address */ + rc = of_property_read_u32(nc, "reg", &value); + if (rc) { +- dev_err(&master->dev, "%s has no valid 'reg' property (%d)\n", ++ dev_err(&ctlr->dev, "%s has no valid 'reg' property (%d)\n", + nc->full_name, rc); +- return rc; ++ goto err_out; + } + spi->chip_select = value; + + /* Device speed */ + rc = of_property_read_u32(nc, "spi-max-frequency", &value); + if (rc) { +- dev_err(&master->dev, "%s has no valid 'spi-max-frequency' property (%d)\n", ++ dev_err(&ctlr->dev, ++ "%s has no valid 'spi-max-frequency' property (%d)\n", + nc->full_name, rc); + goto err_out; + } +@@ -1596,7 +1594,7 @@ static int spi_master_initialize_queue(struct spi_master *master) + /* Register the new device */ + rc = spi_add_device(spi); + if (rc) { +- dev_err(&master->dev, "spi_device register error %s\n", ++ dev_err(&ctlr->dev, "spi_device register error %s\n", + nc->full_name); + goto err_out; + } +@@ -1610,39 +1608,40 @@ static int spi_master_initialize_queue(struct spi_master *master) + + /** + * of_register_spi_devices() - Register child devices onto the SPI bus +- * @master: Pointer to spi_master device ++ * @ctlr: Pointer to spi_controller device + * + * Registers an spi_device for each child node of controller node which + * represents a valid SPI slave. + */ +-static void of_register_spi_devices(struct spi_master *master) ++static void of_register_spi_devices(struct spi_controller *ctlr) + { + struct spi_device *spi; + struct device_node *nc; + +- if (!master->dev.of_node) ++ if (!ctlr->dev.of_node) + return; + +- for_each_available_child_of_node(master->dev.of_node, nc) { ++ for_each_available_child_of_node(ctlr->dev.of_node, nc) { + if (of_node_test_and_set_flag(nc, OF_POPULATED)) + continue; +- spi = of_register_spi_device(master, nc); ++ spi = of_register_spi_device(ctlr, nc); + if (IS_ERR(spi)) { +- dev_warn(&master->dev, "Failed to create SPI device for %s\n", +- nc->full_name); ++ dev_warn(&ctlr->dev, ++ "Failed to create SPI device for %s\n", ++ nc->full_name); + of_node_clear_flag(nc, OF_POPULATED); + } + } + } + #else +-static void of_register_spi_devices(struct spi_master *master) { } ++static void of_register_spi_devices(struct spi_controller *ctlr) { } + #endif + + #ifdef CONFIG_ACPI + static int acpi_spi_add_resource(struct acpi_resource *ares, void *data) + { + struct spi_device *spi = data; +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + + if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { + struct acpi_resource_spi_serialbus *sb; +@@ -1656,8 +1655,8 @@ static int acpi_spi_add_resource(struct acpi_resource *ares, void *data) + * 0 .. max - 1 so we need to ask the driver to + * translate between the two schemes. + */ +- if (master->fw_translate_cs) { +- int cs = master->fw_translate_cs(master, ++ if (ctlr->fw_translate_cs) { ++ int cs = ctlr->fw_translate_cs(ctlr, + sb->device_selection); + if (cs < 0) + return cs; +@@ -1686,7 +1685,7 @@ static int acpi_spi_add_resource(struct acpi_resource *ares, void *data) + return 1; + } + +-static acpi_status acpi_register_spi_device(struct spi_master *master, ++static acpi_status acpi_register_spi_device(struct spi_controller *ctlr, + struct acpi_device *adev) + { + struct list_head resource_list; +@@ -1697,9 +1696,9 @@ static acpi_status acpi_register_spi_device(struct spi_master *master, + acpi_device_enumerated(adev)) + return AE_OK; + +- spi = spi_alloc_device(master); ++ spi = spi_alloc_device(ctlr); + if (!spi) { +- dev_err(&master->dev, "failed to allocate SPI device for %s\n", ++ dev_err(&ctlr->dev, "failed to allocate SPI device for %s\n", + dev_name(&adev->dev)); + return AE_NO_MEMORY; + } +@@ -1726,7 +1725,7 @@ static acpi_status acpi_register_spi_device(struct spi_master *master, + strlcpy(spi->modalias, acpi_device_hid(adev), sizeof(spi->modalias)); + if (spi_add_device(spi)) { + adev->power.flags.ignore_parent = false; +- dev_err(&master->dev, "failed to add SPI device %s from ACPI\n", ++ dev_err(&ctlr->dev, "failed to add SPI device %s from ACPI\n", + dev_name(&adev->dev)); + spi_dev_put(spi); + } +@@ -1737,46 +1736,45 @@ static acpi_status acpi_register_spi_device(struct spi_master *master, + static acpi_status acpi_spi_add_device(acpi_handle handle, u32 level, + void *data, void **return_value) + { +- struct spi_master *master = data; ++ struct spi_controller *ctlr = data; + struct acpi_device *adev; + + if (acpi_bus_get_device(handle, &adev)) + return AE_OK; + +- return acpi_register_spi_device(master, adev); ++ return acpi_register_spi_device(ctlr, adev); + } + +-static void acpi_register_spi_devices(struct spi_master *master) ++static void acpi_register_spi_devices(struct spi_controller *ctlr) + { + acpi_status status; + acpi_handle handle; + +- handle = ACPI_HANDLE(master->dev.parent); ++ handle = ACPI_HANDLE(ctlr->dev.parent); + if (!handle) + return; + + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1, +- acpi_spi_add_device, NULL, +- master, NULL); ++ acpi_spi_add_device, NULL, ctlr, NULL); + if (ACPI_FAILURE(status)) +- dev_warn(&master->dev, "failed to enumerate SPI slaves\n"); ++ dev_warn(&ctlr->dev, "failed to enumerate SPI slaves\n"); + } + #else +-static inline void acpi_register_spi_devices(struct spi_master *master) {} ++static inline void acpi_register_spi_devices(struct spi_controller *ctlr) {} + #endif /* CONFIG_ACPI */ + +-static void spi_master_release(struct device *dev) ++static void spi_controller_release(struct device *dev) + { +- struct spi_master *master; ++ struct spi_controller *ctlr; + +- master = container_of(dev, struct spi_master, dev); +- kfree(master); ++ ctlr = container_of(dev, struct spi_controller, dev); ++ kfree(ctlr); + } + + static struct class spi_master_class = { + .name = "spi_master", + .owner = THIS_MODULE, +- .dev_release = spi_master_release, ++ .dev_release = spi_controller_release, + .dev_groups = spi_master_groups, + }; + +@@ -1788,10 +1786,10 @@ static void spi_master_release(struct device *dev) + */ + int spi_slave_abort(struct spi_device *spi) + { +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + +- if (spi_controller_is_slave(master) && master->slave_abort) +- return master->slave_abort(master); ++ if (spi_controller_is_slave(ctlr) && ctlr->slave_abort) ++ return ctlr->slave_abort(ctlr); + + return -ENOTSUPP; + } +@@ -1805,7 +1803,8 @@ static int match_true(struct device *dev, void *data) + static ssize_t spi_slave_show(struct device *dev, + struct device_attribute *attr, char *buf) + { +- struct spi_master *ctlr = container_of(dev, struct spi_master, dev); ++ struct spi_controller *ctlr = container_of(dev, struct spi_controller, ++ dev); + struct device *child; + + child = device_find_child(&ctlr->dev, NULL, match_true); +@@ -1817,7 +1816,8 @@ static ssize_t spi_slave_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) + { +- struct spi_master *ctlr = container_of(dev, struct spi_master, dev); ++ struct spi_controller *ctlr = container_of(dev, struct spi_controller, ++ dev); + struct spi_device *spi; + struct device *child; + char name[32]; +@@ -1864,7 +1864,7 @@ static ssize_t spi_slave_store(struct device *dev, + }; + + static const struct attribute_group *spi_slave_groups[] = { +- &spi_master_statistics_group, ++ &spi_controller_statistics_group, + &spi_slave_group, + NULL, + }; +@@ -1872,7 +1872,7 @@ static ssize_t spi_slave_store(struct device *dev, + static struct class spi_slave_class = { + .name = "spi_slave", + .owner = THIS_MODULE, +- .dev_release = spi_master_release, ++ .dev_release = spi_controller_release, + .dev_groups = spi_slave_groups, + }; + #else +@@ -1884,62 +1884,63 @@ static ssize_t spi_slave_store(struct device *dev, + * @dev: the controller, possibly using the platform_bus + * @size: how much zeroed driver-private data to allocate; the pointer to this + * memory is in the driver_data field of the returned device, +- * accessible with spi_master_get_devdata(). ++ * accessible with spi_controller_get_devdata(). + * @slave: flag indicating whether to allocate an SPI master (false) or SPI + * slave (true) controller + * Context: can sleep + * + * This call is used only by SPI controller drivers, which are the + * only ones directly touching chip registers. It's how they allocate +- * an spi_master structure, prior to calling spi_register_master(). ++ * an spi_controller structure, prior to calling spi_register_controller(). + * + * This must be called from context that can sleep. + * + * The caller is responsible for assigning the bus number and initializing the +- * controller's methods before calling spi_register_master(); and (after errors +- * adding the device) calling spi_master_put() to prevent a memory leak. ++ * controller's methods before calling spi_register_controller(); and (after ++ * errors adding the device) calling spi_controller_put() to prevent a memory ++ * leak. + * + * Return: the SPI controller structure on success, else NULL. + */ +-struct spi_master *__spi_alloc_controller(struct device *dev, +- unsigned int size, bool slave) ++struct spi_controller *__spi_alloc_controller(struct device *dev, ++ unsigned int size, bool slave) + { +- struct spi_master *master; ++ struct spi_controller *ctlr; + + if (!dev) + return NULL; + +- master = kzalloc(size + sizeof(*master), GFP_KERNEL); +- if (!master) ++ ctlr = kzalloc(size + sizeof(*ctlr), GFP_KERNEL); ++ if (!ctlr) + return NULL; + +- device_initialize(&master->dev); +- master->bus_num = -1; +- master->num_chipselect = 1; +- master->slave = slave; ++ device_initialize(&ctlr->dev); ++ ctlr->bus_num = -1; ++ ctlr->num_chipselect = 1; ++ ctlr->slave = slave; + if (IS_ENABLED(CONFIG_SPI_SLAVE) && slave) +- master->dev.class = &spi_slave_class; ++ ctlr->dev.class = &spi_slave_class; + else +- master->dev.class = &spi_master_class; +- master->dev.parent = dev; +- pm_suspend_ignore_children(&master->dev, true); +- spi_master_set_devdata(master, &master[1]); ++ ctlr->dev.class = &spi_master_class; ++ ctlr->dev.parent = dev; ++ pm_suspend_ignore_children(&ctlr->dev, true); ++ spi_controller_set_devdata(ctlr, &ctlr[1]); + +- return master; ++ return ctlr; + } + EXPORT_SYMBOL_GPL(__spi_alloc_controller); + + #ifdef CONFIG_OF +-static int of_spi_register_master(struct spi_master *master) ++static int of_spi_register_master(struct spi_controller *ctlr) + { + int nb, i, *cs; +- struct device_node *np = master->dev.of_node; ++ struct device_node *np = ctlr->dev.of_node; + + if (!np) + return 0; + + nb = of_gpio_named_count(np, "cs-gpios"); +- master->num_chipselect = max_t(int, nb, master->num_chipselect); ++ ctlr->num_chipselect = max_t(int, nb, ctlr->num_chipselect); + + /* Return error only for an incorrectly formed cs-gpios property */ + if (nb == 0 || nb == -ENOENT) +@@ -1947,15 +1948,14 @@ static int of_spi_register_master(struct spi_master *master) + else if (nb < 0) + return nb; + +- cs = devm_kzalloc(&master->dev, +- sizeof(int) * master->num_chipselect, ++ cs = devm_kzalloc(&ctlr->dev, sizeof(int) * ctlr->num_chipselect, + GFP_KERNEL); +- master->cs_gpios = cs; ++ ctlr->cs_gpios = cs; + +- if (!master->cs_gpios) ++ if (!ctlr->cs_gpios) + return -ENOMEM; + +- for (i = 0; i < master->num_chipselect; i++) ++ for (i = 0; i < ctlr->num_chipselect; i++) + cs[i] = -ENOENT; + + for (i = 0; i < nb; i++) +@@ -1964,20 +1964,21 @@ static int of_spi_register_master(struct spi_master *master) + return 0; + } + #else +-static int of_spi_register_master(struct spi_master *master) ++static int of_spi_register_master(struct spi_controller *ctlr) + { + return 0; + } + #endif + + /** +- * spi_register_master - register SPI master controller +- * @master: initialized master, originally from spi_alloc_master() ++ * spi_register_controller - register SPI master or slave controller ++ * @ctlr: initialized master, originally from spi_alloc_master() or ++ * spi_alloc_slave() + * Context: can sleep + * +- * SPI master controllers connect to their drivers using some non-SPI bus, ++ * SPI controllers connect to their drivers using some non-SPI bus, + * such as the platform bus. The final stage of probe() in that code +- * includes calling spi_register_master() to hook up to this SPI bus glue. ++ * includes calling spi_register_controller() to hook up to this SPI bus glue. + * + * SPI controllers use board specific (often SOC specific) bus numbers, + * and board-specific addressing for SPI devices combines those numbers +@@ -1986,16 +1987,16 @@ static int of_spi_register_master(struct spi_master *master) + * chip is at which address. + * + * This must be called from context that can sleep. It returns zero on +- * success, else a negative error code (dropping the master's refcount). ++ * success, else a negative error code (dropping the controller's refcount). + * After a successful return, the caller is responsible for calling +- * spi_unregister_master(). ++ * spi_unregister_controller(). + * + * Return: zero on success, else a negative error code. + */ +-int spi_register_master(struct spi_master *master) ++int spi_register_controller(struct spi_controller *ctlr) + { + static atomic_t dyn_bus_id = ATOMIC_INIT((1<<15) - 1); +- struct device *dev = master->dev.parent; ++ struct device *dev = ctlr->dev.parent; + struct boardinfo *bi; + int status = -ENODEV; + int dynamic = 0; +@@ -2003,8 +2004,8 @@ int spi_register_master(struct spi_master *master) + if (!dev) + return -ENODEV; + +- if (!spi_controller_is_slave(master)) { +- status = of_spi_register_master(master); ++ if (!spi_controller_is_slave(ctlr)) { ++ status = of_spi_register_master(ctlr); + if (status) + return status; + } +@@ -2012,97 +2013,100 @@ int spi_register_master(struct spi_master *master) + /* even if it's just one always-selected device, there must + * be at least one chipselect + */ +- if (master->num_chipselect == 0) ++ if (ctlr->num_chipselect == 0) + return -EINVAL; + +- if ((master->bus_num < 0) && master->dev.of_node) +- master->bus_num = of_alias_get_id(master->dev.of_node, "spi"); ++ if ((ctlr->bus_num < 0) && ctlr->dev.of_node) ++ ctlr->bus_num = of_alias_get_id(ctlr->dev.of_node, "spi"); + + /* convention: dynamically assigned bus IDs count down from the max */ +- if (master->bus_num < 0) { ++ if (ctlr->bus_num < 0) { + /* FIXME switch to an IDR based scheme, something like + * I2C now uses, so we can't run out of "dynamic" IDs + */ +- master->bus_num = atomic_dec_return(&dyn_bus_id); ++ ctlr->bus_num = atomic_dec_return(&dyn_bus_id); + dynamic = 1; + } + +- INIT_LIST_HEAD(&master->queue); +- spin_lock_init(&master->queue_lock); +- spin_lock_init(&master->bus_lock_spinlock); +- mutex_init(&master->bus_lock_mutex); +- mutex_init(&master->io_mutex); +- master->bus_lock_flag = 0; +- init_completion(&master->xfer_completion); +- if (!master->max_dma_len) +- master->max_dma_len = INT_MAX; ++ INIT_LIST_HEAD(&ctlr->queue); ++ spin_lock_init(&ctlr->queue_lock); ++ spin_lock_init(&ctlr->bus_lock_spinlock); ++ mutex_init(&ctlr->bus_lock_mutex); ++ mutex_init(&ctlr->io_mutex); ++ ctlr->bus_lock_flag = 0; ++ init_completion(&ctlr->xfer_completion); ++ if (!ctlr->max_dma_len) ++ ctlr->max_dma_len = INT_MAX; + + /* register the device, then userspace will see it. + * registration fails if the bus ID is in use. + */ +- dev_set_name(&master->dev, "spi%u", master->bus_num); +- status = device_add(&master->dev); ++ dev_set_name(&ctlr->dev, "spi%u", ctlr->bus_num); ++ status = device_add(&ctlr->dev); + if (status < 0) + goto done; + dev_dbg(dev, "registered %s %s%s\n", +- spi_controller_is_slave(master) ? "slave" : "master", +- dev_name(&master->dev), dynamic ? " (dynamic)" : ""); ++ spi_controller_is_slave(ctlr) ? "slave" : "master", ++ dev_name(&ctlr->dev), dynamic ? " (dynamic)" : ""); + + /* If we're using a queued driver, start the queue */ +- if (master->transfer) ++ if (ctlr->transfer) + dev_info(dev, "master is unqueued, this is deprecated\n"); + else { +- status = spi_master_initialize_queue(master); ++ status = spi_controller_initialize_queue(ctlr); + if (status) { +- device_del(&master->dev); ++ device_del(&ctlr->dev); + goto done; + } + } + /* add statistics */ +- spin_lock_init(&master->statistics.lock); ++ spin_lock_init(&ctlr->statistics.lock); + + mutex_lock(&board_lock); +- list_add_tail(&master->list, &spi_master_list); ++ list_add_tail(&ctlr->list, &spi_controller_list); + list_for_each_entry(bi, &board_list, list) +- spi_match_master_to_boardinfo(master, &bi->board_info); ++ spi_match_controller_to_boardinfo(ctlr, &bi->board_info); + mutex_unlock(&board_lock); + + /* Register devices from the device tree and ACPI */ +- of_register_spi_devices(master); +- acpi_register_spi_devices(master); ++ of_register_spi_devices(ctlr); ++ acpi_register_spi_devices(ctlr); + done: + return status; + } +-EXPORT_SYMBOL_GPL(spi_register_master); ++EXPORT_SYMBOL_GPL(spi_register_controller); + + static void devm_spi_unregister(struct device *dev, void *res) + { +- spi_unregister_master(*(struct spi_master **)res); ++ spi_unregister_controller(*(struct spi_master **)res); + } + + /** +- * dev_spi_register_master - register managed SPI master controller +- * @dev: device managing SPI master +- * @master: initialized master, originally from spi_alloc_master() ++ * devm_spi_register_controller - register managed SPI master or slave ++ * controller ++ * @dev: device managing SPI controller ++ * @ctlr: initialized controller, originally from spi_alloc_master() or ++ * spi_alloc_slave() + * Context: can sleep + * +- * Register a SPI device as with spi_register_master() which will ++ * Register a SPI device as with spi_register_controller() which will + * automatically be unregister + * + * Return: zero on success, else a negative error code. + */ +-int devm_spi_register_master(struct device *dev, struct spi_master *master) ++int devm_spi_register_controller(struct device *dev, ++ struct spi_controller *ctlr) + { +- struct spi_master **ptr; ++ struct spi_controller **ptr; + int ret; + + ptr = devres_alloc(devm_spi_unregister, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return -ENOMEM; + +- ret = spi_register_master(master); ++ ret = spi_register_controller(ctlr); + if (!ret) { +- *ptr = master; ++ *ptr = ctlr; + devres_add(dev, ptr); + } else { + devres_free(ptr); +@@ -2110,7 +2114,7 @@ int devm_spi_register_master(struct device *dev, struct spi_master *master) + + return ret; + } +-EXPORT_SYMBOL_GPL(devm_spi_register_master); ++EXPORT_SYMBOL_GPL(devm_spi_register_controller); + + static int __unregister(struct device *dev, void *null) + { +@@ -2119,71 +2123,71 @@ static int __unregister(struct device *dev, void *null) + } + + /** +- * spi_unregister_master - unregister SPI master controller +- * @master: the master being unregistered ++ * spi_unregister_controller - unregister SPI master or slave controller ++ * @ctlr: the controller being unregistered + * Context: can sleep + * +- * This call is used only by SPI master controller drivers, which are the ++ * This call is used only by SPI controller drivers, which are the + * only ones directly touching chip registers. + * + * This must be called from context that can sleep. + */ +-void spi_unregister_master(struct spi_master *master) ++void spi_unregister_controller(struct spi_controller *ctlr) + { + int dummy; + +- if (master->queued) { +- if (spi_destroy_queue(master)) +- dev_err(&master->dev, "queue remove failed\n"); ++ if (ctlr->queued) { ++ if (spi_destroy_queue(ctlr)) ++ dev_err(&ctlr->dev, "queue remove failed\n"); + } + + mutex_lock(&board_lock); +- list_del(&master->list); ++ list_del(&ctlr->list); + mutex_unlock(&board_lock); + +- dummy = device_for_each_child(&master->dev, NULL, __unregister); +- device_unregister(&master->dev); ++ dummy = device_for_each_child(&ctlr->dev, NULL, __unregister); ++ device_unregister(&ctlr->dev); + } +-EXPORT_SYMBOL_GPL(spi_unregister_master); ++EXPORT_SYMBOL_GPL(spi_unregister_controller); + +-int spi_master_suspend(struct spi_master *master) ++int spi_controller_suspend(struct spi_controller *ctlr) + { + int ret; + +- /* Basically no-ops for non-queued masters */ +- if (!master->queued) ++ /* Basically no-ops for non-queued controllers */ ++ if (!ctlr->queued) + return 0; + +- ret = spi_stop_queue(master); ++ ret = spi_stop_queue(ctlr); + if (ret) +- dev_err(&master->dev, "queue stop failed\n"); ++ dev_err(&ctlr->dev, "queue stop failed\n"); + + return ret; + } +-EXPORT_SYMBOL_GPL(spi_master_suspend); ++EXPORT_SYMBOL_GPL(spi_controller_suspend); + +-int spi_master_resume(struct spi_master *master) ++int spi_controller_resume(struct spi_controller *ctlr) + { + int ret; + +- if (!master->queued) ++ if (!ctlr->queued) + return 0; + +- ret = spi_start_queue(master); ++ ret = spi_start_queue(ctlr); + if (ret) +- dev_err(&master->dev, "queue restart failed\n"); ++ dev_err(&ctlr->dev, "queue restart failed\n"); + + return ret; + } +-EXPORT_SYMBOL_GPL(spi_master_resume); ++EXPORT_SYMBOL_GPL(spi_controller_resume); + +-static int __spi_master_match(struct device *dev, const void *data) ++static int __spi_controller_match(struct device *dev, const void *data) + { +- struct spi_master *m; ++ struct spi_controller *ctlr; + const u16 *bus_num = data; + +- m = container_of(dev, struct spi_master, dev); +- return m->bus_num == *bus_num; ++ ctlr = container_of(dev, struct spi_controller, dev); ++ return ctlr->bus_num == *bus_num; + } + + /** +@@ -2193,22 +2197,22 @@ static int __spi_master_match(struct device *dev, const void *data) + * + * This call may be used with devices that are registered after + * arch init time. It returns a refcounted pointer to the relevant +- * spi_master (which the caller must release), or NULL if there is ++ * spi_controller (which the caller must release), or NULL if there is + * no such master registered. + * + * Return: the SPI master structure on success, else NULL. + */ +-struct spi_master *spi_busnum_to_master(u16 bus_num) ++struct spi_controller *spi_busnum_to_master(u16 bus_num) + { + struct device *dev; +- struct spi_master *master = NULL; ++ struct spi_controller *ctlr = NULL; + + dev = class_find_device(&spi_master_class, NULL, &bus_num, +- __spi_master_match); ++ __spi_controller_match); + if (dev) +- master = container_of(dev, struct spi_master, dev); ++ ctlr = container_of(dev, struct spi_controller, dev); + /* reference got in class_find_device */ +- return master; ++ return ctlr; + } + EXPORT_SYMBOL_GPL(spi_busnum_to_master); + +@@ -2228,7 +2232,7 @@ struct spi_master *spi_busnum_to_master(u16 bus_num) + * Return: the pointer to the allocated data + * + * This may get enhanced in the future to allocate from a memory pool +- * of the @spi_device or @spi_master to avoid repeated allocations. ++ * of the @spi_device or @spi_controller to avoid repeated allocations. + */ + void *spi_res_alloc(struct spi_device *spi, + spi_res_release_t release, +@@ -2280,11 +2284,10 @@ void spi_res_add(struct spi_message *message, void *res) + + /** + * spi_res_release - release all spi resources for this message +- * @master: the @spi_master ++ * @ctlr: the @spi_controller + * @message: the @spi_message + */ +-void spi_res_release(struct spi_master *master, +- struct spi_message *message) ++void spi_res_release(struct spi_controller *ctlr, struct spi_message *message) + { + struct spi_res *res; + +@@ -2293,7 +2296,7 @@ void spi_res_release(struct spi_master *master, + struct spi_res, entry); + + if (res->release) +- res->release(master, message, res->data); ++ res->release(ctlr, message, res->data); + + list_del(&res->entry); + +@@ -2306,7 +2309,7 @@ void spi_res_release(struct spi_master *master, + + /* Core methods for spi_message alterations */ + +-static void __spi_replace_transfers_release(struct spi_master *master, ++static void __spi_replace_transfers_release(struct spi_controller *ctlr, + struct spi_message *msg, + void *res) + { +@@ -2315,7 +2318,7 @@ static void __spi_replace_transfers_release(struct spi_master *master, + + /* call extra callback if requested */ + if (rxfer->release) +- rxfer->release(master, msg, res); ++ rxfer->release(ctlr, msg, res); + + /* insert replaced transfers back into the message */ + list_splice(&rxfer->replaced_transfers, rxfer->replaced_after); +@@ -2435,7 +2438,7 @@ struct spi_replaced_transfers *spi_replace_transfers( + } + EXPORT_SYMBOL_GPL(spi_replace_transfers); + +-static int __spi_split_transfer_maxsize(struct spi_master *master, ++static int __spi_split_transfer_maxsize(struct spi_controller *ctlr, + struct spi_message *msg, + struct spi_transfer **xferp, + size_t maxsize, +@@ -2497,7 +2500,7 @@ static int __spi_split_transfer_maxsize(struct spi_master *master, + *xferp = &xfers[count - 1]; + + /* increment statistics counters */ +- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics, ++ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics, + transfers_split_maxsize); + SPI_STATISTICS_INCREMENT_FIELD(&msg->spi->statistics, + transfers_split_maxsize); +@@ -2509,14 +2512,14 @@ static int __spi_split_transfer_maxsize(struct spi_master *master, + * spi_split_tranfers_maxsize - split spi transfers into multiple transfers + * when an individual transfer exceeds a + * certain size +- * @master: the @spi_master for this transfer ++ * @ctlr: the @spi_controller for this transfer + * @msg: the @spi_message to transform + * @maxsize: the maximum when to apply this + * @gfp: GFP allocation flags + * + * Return: status of transformation + */ +-int spi_split_transfers_maxsize(struct spi_master *master, ++int spi_split_transfers_maxsize(struct spi_controller *ctlr, + struct spi_message *msg, + size_t maxsize, + gfp_t gfp) +@@ -2532,8 +2535,8 @@ int spi_split_transfers_maxsize(struct spi_master *master, + */ + list_for_each_entry(xfer, &msg->transfers, transfer_list) { + if (xfer->len > maxsize) { +- ret = __spi_split_transfer_maxsize( +- master, msg, &xfer, maxsize, gfp); ++ ret = __spi_split_transfer_maxsize(ctlr, msg, &xfer, ++ maxsize, gfp); + if (ret) + return ret; + } +@@ -2545,18 +2548,18 @@ int spi_split_transfers_maxsize(struct spi_master *master, + + /*-------------------------------------------------------------------------*/ + +-/* Core methods for SPI master protocol drivers. Some of the ++/* Core methods for SPI controller protocol drivers. Some of the + * other core methods are currently defined as inline functions. + */ + +-static int __spi_validate_bits_per_word(struct spi_master *master, u8 bits_per_word) ++static int __spi_validate_bits_per_word(struct spi_controller *ctlr, ++ u8 bits_per_word) + { +- if (master->bits_per_word_mask) { ++ if (ctlr->bits_per_word_mask) { + /* Only 32 bits fit in the mask */ + if (bits_per_word > 32) + return -EINVAL; +- if (!(master->bits_per_word_mask & +- SPI_BPW_MASK(bits_per_word))) ++ if (!(ctlr->bits_per_word_mask & SPI_BPW_MASK(bits_per_word))) + return -EINVAL; + } + +@@ -2602,9 +2605,9 @@ int spi_setup(struct spi_device *spi) + (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD))) + return -EINVAL; + /* help drivers fail *cleanly* when they need options +- * that aren't supported with their current master ++ * that aren't supported with their current controller + */ +- bad_bits = spi->mode & ~spi->master->mode_bits; ++ bad_bits = spi->mode & ~spi->controller->mode_bits; + ugly_bits = bad_bits & + (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD); + if (ugly_bits) { +@@ -2623,15 +2626,16 @@ int spi_setup(struct spi_device *spi) + if (!spi->bits_per_word) + spi->bits_per_word = 8; + +- status = __spi_validate_bits_per_word(spi->master, spi->bits_per_word); ++ status = __spi_validate_bits_per_word(spi->controller, ++ spi->bits_per_word); + if (status) + return status; + + if (!spi->max_speed_hz) +- spi->max_speed_hz = spi->master->max_speed_hz; ++ spi->max_speed_hz = spi->controller->max_speed_hz; + +- if (spi->master->setup) +- status = spi->master->setup(spi); ++ if (spi->controller->setup) ++ status = spi->controller->setup(spi); + + spi_set_cs(spi, false); + +@@ -2650,7 +2654,7 @@ int spi_setup(struct spi_device *spi) + + static int __spi_validate(struct spi_device *spi, struct spi_message *message) + { +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + struct spi_transfer *xfer; + int w_size; + +@@ -2662,16 +2666,16 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) + * either MOSI or MISO is missing. They can also be caused by + * software limitations. + */ +- if ((master->flags & SPI_MASTER_HALF_DUPLEX) +- || (spi->mode & SPI_3WIRE)) { +- unsigned flags = master->flags; ++ if ((ctlr->flags & SPI_CONTROLLER_HALF_DUPLEX) || ++ (spi->mode & SPI_3WIRE)) { ++ unsigned flags = ctlr->flags; + + list_for_each_entry(xfer, &message->transfers, transfer_list) { + if (xfer->rx_buf && xfer->tx_buf) + return -EINVAL; +- if ((flags & SPI_MASTER_NO_TX) && xfer->tx_buf) ++ if ((flags & SPI_CONTROLLER_NO_TX) && xfer->tx_buf) + return -EINVAL; +- if ((flags & SPI_MASTER_NO_RX) && xfer->rx_buf) ++ if ((flags & SPI_CONTROLLER_NO_RX) && xfer->rx_buf) + return -EINVAL; + } + } +@@ -2691,13 +2695,12 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) + if (!xfer->speed_hz) + xfer->speed_hz = spi->max_speed_hz; + if (!xfer->speed_hz) +- xfer->speed_hz = master->max_speed_hz; ++ xfer->speed_hz = ctlr->max_speed_hz; + +- if (master->max_speed_hz && +- xfer->speed_hz > master->max_speed_hz) +- xfer->speed_hz = master->max_speed_hz; ++ if (ctlr->max_speed_hz && xfer->speed_hz > ctlr->max_speed_hz) ++ xfer->speed_hz = ctlr->max_speed_hz; + +- if (__spi_validate_bits_per_word(master, xfer->bits_per_word)) ++ if (__spi_validate_bits_per_word(ctlr, xfer->bits_per_word)) + return -EINVAL; + + /* +@@ -2715,8 +2718,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) + if (xfer->len % w_size) + return -EINVAL; + +- if (xfer->speed_hz && master->min_speed_hz && +- xfer->speed_hz < master->min_speed_hz) ++ if (xfer->speed_hz && ctlr->min_speed_hz && ++ xfer->speed_hz < ctlr->min_speed_hz) + return -EINVAL; + + if (xfer->tx_buf && !xfer->tx_nbits) +@@ -2761,16 +2764,16 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) + + static int __spi_async(struct spi_device *spi, struct spi_message *message) + { +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + + message->spi = spi; + +- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics, spi_async); ++ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics, spi_async); + SPI_STATISTICS_INCREMENT_FIELD(&spi->statistics, spi_async); + + trace_spi_message_submit(message); + +- return master->transfer(spi, message); ++ return ctlr->transfer(spi, message); + } + + /** +@@ -2806,7 +2809,7 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) + */ + int spi_async(struct spi_device *spi, struct spi_message *message) + { +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + int ret; + unsigned long flags; + +@@ -2814,14 +2817,14 @@ int spi_async(struct spi_device *spi, struct spi_message *message) + if (ret != 0) + return ret; + +- spin_lock_irqsave(&master->bus_lock_spinlock, flags); ++ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags); + +- if (master->bus_lock_flag) ++ if (ctlr->bus_lock_flag) + ret = -EBUSY; + else + ret = __spi_async(spi, message); + +- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags); ++ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags); + + return ret; + } +@@ -2860,7 +2863,7 @@ int spi_async(struct spi_device *spi, struct spi_message *message) + */ + int spi_async_locked(struct spi_device *spi, struct spi_message *message) + { +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + int ret; + unsigned long flags; + +@@ -2868,11 +2871,11 @@ int spi_async_locked(struct spi_device *spi, struct spi_message *message) + if (ret != 0) + return ret; + +- spin_lock_irqsave(&master->bus_lock_spinlock, flags); ++ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags); + + ret = __spi_async(spi, message); + +- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags); ++ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags); + + return ret; + +@@ -2884,7 +2887,7 @@ int spi_flash_read(struct spi_device *spi, + struct spi_flash_read_message *msg) + + { +- struct spi_master *master = spi->master; ++ struct spi_controller *master = spi->controller; + struct device *rx_dev = NULL; + int ret; + +@@ -2938,7 +2941,7 @@ int spi_flash_read(struct spi_device *spi, + + /*-------------------------------------------------------------------------*/ + +-/* Utility methods for SPI master protocol drivers, layered on ++/* Utility methods for SPI protocol drivers, layered on + * top of the core. Some other utility methods are defined as + * inline functions. + */ +@@ -2952,7 +2955,7 @@ static int __spi_sync(struct spi_device *spi, struct spi_message *message) + { + DECLARE_COMPLETION_ONSTACK(done); + int status; +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + unsigned long flags; + + status = __spi_validate(spi, message); +@@ -2963,7 +2966,7 @@ static int __spi_sync(struct spi_device *spi, struct spi_message *message) + message->context = &done; + message->spi = spi; + +- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics, spi_sync); ++ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics, spi_sync); + SPI_STATISTICS_INCREMENT_FIELD(&spi->statistics, spi_sync); + + /* If we're not using the legacy transfer method then we will +@@ -2971,14 +2974,14 @@ static int __spi_sync(struct spi_device *spi, struct spi_message *message) + * This code would be less tricky if we could remove the + * support for driver implemented message queues. + */ +- if (master->transfer == spi_queued_transfer) { +- spin_lock_irqsave(&master->bus_lock_spinlock, flags); ++ if (ctlr->transfer == spi_queued_transfer) { ++ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags); + + trace_spi_message_submit(message); + + status = __spi_queued_transfer(spi, message, false); + +- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags); ++ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags); + } else { + status = spi_async_locked(spi, message); + } +@@ -2987,12 +2990,12 @@ static int __spi_sync(struct spi_device *spi, struct spi_message *message) + /* Push out the messages in the calling context if we + * can. + */ +- if (master->transfer == spi_queued_transfer) { +- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics, ++ if (ctlr->transfer == spi_queued_transfer) { ++ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics, + spi_sync_immediate); + SPI_STATISTICS_INCREMENT_FIELD(&spi->statistics, + spi_sync_immediate); +- __spi_pump_messages(master, false); ++ __spi_pump_messages(ctlr, false); + } + + wait_for_completion(&done); +@@ -3027,9 +3030,9 @@ int spi_sync(struct spi_device *spi, struct spi_message *message) + { + int ret; + +- mutex_lock(&spi->master->bus_lock_mutex); ++ mutex_lock(&spi->controller->bus_lock_mutex); + ret = __spi_sync(spi, message); +- mutex_unlock(&spi->master->bus_lock_mutex); ++ mutex_unlock(&spi->controller->bus_lock_mutex); + + return ret; + } +@@ -3059,7 +3062,7 @@ int spi_sync_locked(struct spi_device *spi, struct spi_message *message) + + /** + * spi_bus_lock - obtain a lock for exclusive SPI bus usage +- * @master: SPI bus master that should be locked for exclusive bus access ++ * @ctlr: SPI bus master that should be locked for exclusive bus access + * Context: can sleep + * + * This call may only be used from a context that may sleep. The sleep +@@ -3072,15 +3075,15 @@ int spi_sync_locked(struct spi_device *spi, struct spi_message *message) + * + * Return: always zero. + */ +-int spi_bus_lock(struct spi_master *master) ++int spi_bus_lock(struct spi_controller *ctlr) + { + unsigned long flags; + +- mutex_lock(&master->bus_lock_mutex); ++ mutex_lock(&ctlr->bus_lock_mutex); + +- spin_lock_irqsave(&master->bus_lock_spinlock, flags); +- master->bus_lock_flag = 1; +- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags); ++ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags); ++ ctlr->bus_lock_flag = 1; ++ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags); + + /* mutex remains locked until spi_bus_unlock is called */ + +@@ -3090,7 +3093,7 @@ int spi_bus_lock(struct spi_master *master) + + /** + * spi_bus_unlock - release the lock for exclusive SPI bus usage +- * @master: SPI bus master that was locked for exclusive bus access ++ * @ctlr: SPI bus master that was locked for exclusive bus access + * Context: can sleep + * + * This call may only be used from a context that may sleep. The sleep +@@ -3101,11 +3104,11 @@ int spi_bus_lock(struct spi_master *master) + * + * Return: always zero. + */ +-int spi_bus_unlock(struct spi_master *master) ++int spi_bus_unlock(struct spi_controller *ctlr) + { +- master->bus_lock_flag = 0; ++ ctlr->bus_lock_flag = 0; + +- mutex_unlock(&master->bus_lock_mutex); ++ mutex_unlock(&ctlr->bus_lock_mutex); + + return 0; + } +@@ -3207,48 +3210,48 @@ static struct spi_device *of_find_spi_device_by_node(struct device_node *node) + return dev ? to_spi_device(dev) : NULL; + } + +-static int __spi_of_master_match(struct device *dev, const void *data) ++static int __spi_of_controller_match(struct device *dev, const void *data) + { + return dev->of_node == data; + } + +-/* the spi masters are not using spi_bus, so we find it with another way */ +-static struct spi_master *of_find_spi_master_by_node(struct device_node *node) ++/* the spi controllers are not using spi_bus, so we find it with another way */ ++static struct spi_controller *of_find_spi_controller_by_node(struct device_node *node) + { + struct device *dev; + + dev = class_find_device(&spi_master_class, NULL, node, +- __spi_of_master_match); ++ __spi_of_controller_match); + if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE)) + dev = class_find_device(&spi_slave_class, NULL, node, +- __spi_of_master_match); ++ __spi_of_controller_match); + if (!dev) + return NULL; + + /* reference got in class_find_device */ +- return container_of(dev, struct spi_master, dev); ++ return container_of(dev, struct spi_controller, dev); + } + + static int of_spi_notify(struct notifier_block *nb, unsigned long action, + void *arg) + { + struct of_reconfig_data *rd = arg; +- struct spi_master *master; ++ struct spi_controller *ctlr; + struct spi_device *spi; + + switch (of_reconfig_get_state_change(action, arg)) { + case OF_RECONFIG_CHANGE_ADD: +- master = of_find_spi_master_by_node(rd->dn->parent); +- if (master == NULL) ++ ctlr = of_find_spi_controller_by_node(rd->dn->parent); ++ if (ctlr == NULL) + return NOTIFY_OK; /* not for us */ + + if (of_node_test_and_set_flag(rd->dn, OF_POPULATED)) { +- put_device(&master->dev); ++ put_device(&ctlr->dev); + return NOTIFY_OK; + } + +- spi = of_register_spi_device(master, rd->dn); +- put_device(&master->dev); ++ spi = of_register_spi_device(ctlr, rd->dn); ++ put_device(&ctlr->dev); + + if (IS_ERR(spi)) { + pr_err("%s: failed to create for '%s'\n", +@@ -3287,7 +3290,7 @@ static int of_spi_notify(struct notifier_block *nb, unsigned long action, + #endif /* IS_ENABLED(CONFIG_OF_DYNAMIC) */ + + #if IS_ENABLED(CONFIG_ACPI) +-static int spi_acpi_master_match(struct device *dev, const void *data) ++static int spi_acpi_controller_match(struct device *dev, const void *data) + { + return ACPI_COMPANION(dev->parent) == data; + } +@@ -3297,19 +3300,19 @@ static int spi_acpi_device_match(struct device *dev, void *data) + return ACPI_COMPANION(dev) == data; + } + +-static struct spi_master *acpi_spi_find_master_by_adev(struct acpi_device *adev) ++static struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev) + { + struct device *dev; + + dev = class_find_device(&spi_master_class, NULL, adev, +- spi_acpi_master_match); ++ spi_acpi_controller_match); + if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE)) + dev = class_find_device(&spi_slave_class, NULL, adev, +- spi_acpi_master_match); ++ spi_acpi_controller_match); + if (!dev) + return NULL; + +- return container_of(dev, struct spi_master, dev); ++ return container_of(dev, struct spi_controller, dev); + } + + static struct spi_device *acpi_spi_find_device_by_adev(struct acpi_device *adev) +@@ -3325,17 +3328,17 @@ static int acpi_spi_notify(struct notifier_block *nb, unsigned long value, + void *arg) + { + struct acpi_device *adev = arg; +- struct spi_master *master; ++ struct spi_controller *ctlr; + struct spi_device *spi; + + switch (value) { + case ACPI_RECONFIG_DEVICE_ADD: +- master = acpi_spi_find_master_by_adev(adev->parent); +- if (!master) ++ ctlr = acpi_spi_find_controller_by_adev(adev->parent); ++ if (!ctlr) + break; + +- acpi_register_spi_device(master, adev); +- put_device(&master->dev); ++ acpi_register_spi_device(ctlr, adev); ++ put_device(&ctlr->dev); + break; + case ACPI_RECONFIG_DEVICE_REMOVE: + if (!acpi_device_enumerated(adev)) +diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h +index f9bbd33..920cdb7 100644 +--- a/include/linux/spi/spi.h ++++ b/include/linux/spi/spi.h +@@ -23,7 +23,7 @@ + #include <linux/scatterlist.h> + + struct dma_chan; +-struct spi_master; ++struct spi_controller; + struct spi_transfer; + struct spi_flash_read_message; + +@@ -83,7 +83,7 @@ struct spi_statistics { + + void spi_statistics_add_transfer_stats(struct spi_statistics *stats, + struct spi_transfer *xfer, +- struct spi_master *master); ++ struct spi_controller *ctlr); + + #define SPI_STATISTICS_ADD_TO_FIELD(stats, field, count) \ + do { \ +@@ -97,13 +97,14 @@ void spi_statistics_add_transfer_stats(struct spi_statistics *stats, + SPI_STATISTICS_ADD_TO_FIELD(stats, field, 1) + + /** +- * struct spi_device - Master side proxy for an SPI slave device ++ * struct spi_device - Controller side proxy for an SPI slave device + * @dev: Driver model representation of the device. +- * @master: SPI controller used with the device. ++ * @controller: SPI controller used with the device. ++ * @master: Copy of controller, for backwards compatibility. + * @max_speed_hz: Maximum clock rate to be used with this chip + * (on this board); may be changed by the device's driver. + * The spi_transfer.speed_hz can override this for each transfer. +- * @chip_select: Chipselect, distinguishing chips handled by @master. ++ * @chip_select: Chipselect, distinguishing chips handled by @controller. + * @mode: The spi mode defines how data is clocked out and in. + * This may be changed by the device's driver. + * The "active low" default for chipselect mode can be overridden +@@ -139,7 +140,8 @@ void spi_statistics_add_transfer_stats(struct spi_statistics *stats, + */ + struct spi_device { + struct device dev; +- struct spi_master *master; ++ struct spi_controller *controller; ++ struct spi_controller *master; /* compatibility layer */ + u32 max_speed_hz; + u8 chip_select; + u8 bits_per_word; +@@ -197,7 +199,7 @@ static inline void spi_dev_put(struct spi_device *spi) + put_device(&spi->dev); + } + +-/* ctldata is for the bus_master driver's runtime state */ ++/* ctldata is for the bus_controller driver's runtime state */ + static inline void *spi_get_ctldata(struct spi_device *spi) + { + return spi->controller_state; +@@ -291,9 +293,9 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) + spi_unregister_driver) + + /** +- * struct spi_master - interface to SPI master controller ++ * struct spi_controller - interface to SPI master or slave controller + * @dev: device interface to this driver +- * @list: link with the global spi_master list ++ * @list: link with the global spi_controller list + * @bus_num: board-specific (and often SOC-specific) identifier for a + * given SPI controller. + * @num_chipselect: chipselects are used to distinguish individual +@@ -326,8 +328,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) + * the device whose settings are being modified. + * @transfer: adds a message to the controller's transfer queue. + * @cleanup: frees controller-specific state +- * @can_dma: determine whether this master supports DMA +- * @queued: whether this master is providing an internal message queue ++ * @can_dma: determine whether this controller supports DMA ++ * @queued: whether this controller is providing an internal message queue + * @kworker: thread struct for message pump + * @kworker_task: pointer to task for message pump kworker thread + * @pump_messages: work struct for scheduling work to the message pump +@@ -381,7 +383,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) + * @cs_gpios: Array of GPIOs to use as chip select lines; one per CS + * number. Any individual value may be -ENOENT for CS lines that + * are not GPIOs (driven by the SPI controller itself). +- * @statistics: statistics for the spi_master ++ * @statistics: statistics for the spi_controller + * @dma_tx: DMA transmit channel + * @dma_rx: DMA receive channel + * @dummy_rx: dummy receive buffer for full-duplex devices +@@ -390,7 +392,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) + * what Linux expects, this optional hook can be used to translate + * between the two. + * +- * Each SPI master controller can communicate with one or more @spi_device ++ * Each SPI controller can communicate with one or more @spi_device + * children. These make a small bus, sharing MOSI, MISO and SCK signals + * but not chip select signals. Each device may be configured to use a + * different clock rate, since those shared signals are ignored unless +@@ -401,7 +403,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) + * an SPI slave device. For each such message it queues, it calls the + * message's completion function when the transaction completes. + */ +-struct spi_master { ++struct spi_controller { + struct device dev; + + struct list_head list; +@@ -439,11 +441,13 @@ struct spi_master { + + /* other constraints relevant to this driver */ + u16 flags; +-#define SPI_MASTER_HALF_DUPLEX BIT(0) /* can't do full duplex */ +-#define SPI_MASTER_NO_RX BIT(1) /* can't do buffer read */ +-#define SPI_MASTER_NO_TX BIT(2) /* can't do buffer write */ +-#define SPI_MASTER_MUST_RX BIT(3) /* requires rx */ +-#define SPI_MASTER_MUST_TX BIT(4) /* requires tx */ ++#define SPI_CONTROLLER_HALF_DUPLEX BIT(0) /* can't do full duplex */ ++#define SPI_CONTROLLER_NO_RX BIT(1) /* can't do buffer read */ ++#define SPI_CONTROLLER_NO_TX BIT(2) /* can't do buffer write */ ++#define SPI_CONTROLLER_MUST_RX BIT(3) /* requires rx */ ++#define SPI_CONTROLLER_MUST_TX BIT(4) /* requires tx */ ++ ++#define SPI_MASTER_GPIO_SS BIT(5) /* GPIO CS must select slave */ + + /* flag indicating this is an SPI slave controller */ + bool slave; +@@ -481,8 +485,8 @@ struct spi_master { + * any other request management + * + To a given spi_device, message queueing is pure fifo + * +- * + The master's main job is to process its message queue, +- * selecting a chip then transferring data ++ * + The controller's main job is to process its message queue, ++ * selecting a chip (for masters), then transferring data + * + If there are multiple spi_device children, the i/o queue + * arbitration algorithm is unspecified (round robin, fifo, + * priority, reservations, preemption, etc) +@@ -495,7 +499,7 @@ struct spi_master { + int (*transfer)(struct spi_device *spi, + struct spi_message *mesg); + +- /* called on release() to free memory provided by spi_master */ ++ /* called on release() to free memory provided by spi_controller */ + void (*cleanup)(struct spi_device *spi); + + /* +@@ -505,13 +509,13 @@ struct spi_master { + * not modify or store xfer and dma_tx and dma_rx must be set + * while the device is prepared. + */ +- bool (*can_dma)(struct spi_master *master, ++ bool (*can_dma)(struct spi_controller *ctlr, + struct spi_device *spi, + struct spi_transfer *xfer); + + /* + * These hooks are for drivers that want to use the generic +- * master transfer queueing mechanism. If these are used, the ++ * controller transfer queueing mechanism. If these are used, the + * transfer() function above must NOT be specified by the driver. + * Over time we expect SPI drivers to be phased over to this API. + */ +@@ -532,15 +536,15 @@ struct spi_master { + struct completion xfer_completion; + size_t max_dma_len; + +- int (*prepare_transfer_hardware)(struct spi_master *master); +- int (*transfer_one_message)(struct spi_master *master, ++ int (*prepare_transfer_hardware)(struct spi_controller *ctlr); ++ int (*transfer_one_message)(struct spi_controller *ctlr, + struct spi_message *mesg); +- int (*unprepare_transfer_hardware)(struct spi_master *master); +- int (*prepare_message)(struct spi_master *master, ++ int (*unprepare_transfer_hardware)(struct spi_controller *ctlr); ++ int (*prepare_message)(struct spi_controller *ctlr, + struct spi_message *message); +- int (*unprepare_message)(struct spi_master *master, ++ int (*unprepare_message)(struct spi_controller *ctlr, + struct spi_message *message); +- int (*slave_abort)(struct spi_master *spi); ++ int (*slave_abort)(struct spi_controller *ctlr); + int (*spi_flash_read)(struct spi_device *spi, + struct spi_flash_read_message *msg); + bool (*flash_read_supported)(struct spi_device *spi); +@@ -550,9 +554,9 @@ struct spi_master { + * of transfer_one_message() provied by the core. + */ + void (*set_cs)(struct spi_device *spi, bool enable); +- int (*transfer_one)(struct spi_master *master, struct spi_device *spi, ++ int (*transfer_one)(struct spi_controller *ctlr, struct spi_device *spi, + struct spi_transfer *transfer); +- void (*handle_err)(struct spi_master *master, ++ void (*handle_err)(struct spi_controller *ctlr, + struct spi_message *message); + + /* gpio chip select */ +@@ -569,58 +573,59 @@ struct spi_master { + void *dummy_rx; + void *dummy_tx; + +- int (*fw_translate_cs)(struct spi_master *master, unsigned cs); ++ int (*fw_translate_cs)(struct spi_controller *ctlr, unsigned cs); + }; + +-static inline void *spi_master_get_devdata(struct spi_master *master) ++static inline void *spi_controller_get_devdata(struct spi_controller *ctlr) + { +- return dev_get_drvdata(&master->dev); ++ return dev_get_drvdata(&ctlr->dev); + } + +-static inline void spi_master_set_devdata(struct spi_master *master, void *data) ++static inline void spi_controller_set_devdata(struct spi_controller *ctlr, ++ void *data) + { +- dev_set_drvdata(&master->dev, data); ++ dev_set_drvdata(&ctlr->dev, data); + } + +-static inline struct spi_master *spi_master_get(struct spi_master *master) ++static inline struct spi_controller *spi_controller_get(struct spi_controller *ctlr) + { +- if (!master || !get_device(&master->dev)) ++ if (!ctlr || !get_device(&ctlr->dev)) + return NULL; +- return master; ++ return ctlr; + } + +-static inline void spi_master_put(struct spi_master *master) ++static inline void spi_controller_put(struct spi_controller *ctlr) + { +- if (master) +- put_device(&master->dev); ++ if (ctlr) ++ put_device(&ctlr->dev); + } + +-static inline bool spi_controller_is_slave(struct spi_master *ctlr) ++static inline bool spi_controller_is_slave(struct spi_controller *ctlr) + { + return IS_ENABLED(CONFIG_SPI_SLAVE) && ctlr->slave; + } + + /* PM calls that need to be issued by the driver */ +-extern int spi_master_suspend(struct spi_master *master); +-extern int spi_master_resume(struct spi_master *master); ++extern int spi_controller_suspend(struct spi_controller *ctlr); ++extern int spi_controller_resume(struct spi_controller *ctlr); + + /* Calls the driver make to interact with the message queue */ +-extern struct spi_message *spi_get_next_queued_message(struct spi_master *master); +-extern void spi_finalize_current_message(struct spi_master *master); +-extern void spi_finalize_current_transfer(struct spi_master *master); ++extern struct spi_message *spi_get_next_queued_message(struct spi_controller *ctlr); ++extern void spi_finalize_current_message(struct spi_controller *ctlr); ++extern void spi_finalize_current_transfer(struct spi_controller *ctlr); + +-/* the spi driver core manages memory for the spi_master classdev */ +-extern struct spi_master *__spi_alloc_controller(struct device *host, +- unsigned int size, bool slave); ++/* the spi driver core manages memory for the spi_controller classdev */ ++extern struct spi_controller *__spi_alloc_controller(struct device *host, ++ unsigned int size, bool slave); + +-static inline struct spi_master *spi_alloc_master(struct device *host, +- unsigned int size) ++static inline struct spi_controller *spi_alloc_master(struct device *host, ++ unsigned int size) + { + return __spi_alloc_controller(host, size, false); + } + +-static inline struct spi_master *spi_alloc_slave(struct device *host, +- unsigned int size) ++static inline struct spi_controller *spi_alloc_slave(struct device *host, ++ unsigned int size) + { + if (!IS_ENABLED(CONFIG_SPI_SLAVE)) + return NULL; +@@ -628,18 +633,18 @@ static inline struct spi_master *spi_alloc_slave(struct device *host, + return __spi_alloc_controller(host, size, true); + } + +-extern int spi_register_master(struct spi_master *master); +-extern int devm_spi_register_master(struct device *dev, +- struct spi_master *master); +-extern void spi_unregister_master(struct spi_master *master); ++extern int spi_register_controller(struct spi_controller *ctlr); ++extern int devm_spi_register_controller(struct device *dev, ++ struct spi_controller *ctlr); ++extern void spi_unregister_controller(struct spi_controller *ctlr); + +-extern struct spi_master *spi_busnum_to_master(u16 busnum); ++extern struct spi_controller *spi_busnum_to_master(u16 busnum); + + /* + * SPI resource management while processing a SPI message + */ + +-typedef void (*spi_res_release_t)(struct spi_master *master, ++typedef void (*spi_res_release_t)(struct spi_controller *ctlr, + struct spi_message *msg, + void *res); + +@@ -664,7 +669,7 @@ extern void *spi_res_alloc(struct spi_device *spi, + extern void spi_res_add(struct spi_message *message, void *res); + extern void spi_res_free(void *res); + +-extern void spi_res_release(struct spi_master *master, ++extern void spi_res_release(struct spi_controller *ctlr, + struct spi_message *message); + + /*---------------------------------------------------------------------------*/ +@@ -848,7 +853,7 @@ struct spi_message { + + /* for optional use by whatever driver currently owns the + * spi_message ... between calls to spi_async and then later +- * complete(), that's the spi_master controller driver. ++ * complete(), that's the spi_controller controller driver. + */ + struct list_head queue; + void *state; +@@ -937,21 +942,22 @@ extern int spi_async_locked(struct spi_device *spi, + static inline size_t + spi_max_message_size(struct spi_device *spi) + { +- struct spi_master *master = spi->master; +- if (!master->max_message_size) ++ struct spi_controller *ctlr = spi->controller; ++ ++ if (!ctlr->max_message_size) + return SIZE_MAX; +- return master->max_message_size(spi); ++ return ctlr->max_message_size(spi); + } + + static inline size_t + spi_max_transfer_size(struct spi_device *spi) + { +- struct spi_master *master = spi->master; ++ struct spi_controller *ctlr = spi->controller; + size_t tr_max = SIZE_MAX; + size_t msg_max = spi_max_message_size(spi); + +- if (master->max_transfer_size) +- tr_max = master->max_transfer_size(spi); ++ if (ctlr->max_transfer_size) ++ tr_max = ctlr->max_transfer_size(spi); + + /* transfer size limit must not be greater than messsage size limit */ + return min(tr_max, msg_max); +@@ -962,7 +968,7 @@ extern int spi_async_locked(struct spi_device *spi, + /* SPI transfer replacement methods which make use of spi_res */ + + struct spi_replaced_transfers; +-typedef void (*spi_replaced_release_t)(struct spi_master *master, ++typedef void (*spi_replaced_release_t)(struct spi_controller *ctlr, + struct spi_message *msg, + struct spi_replaced_transfers *res); + /** +@@ -1006,7 +1012,7 @@ extern struct spi_replaced_transfers *spi_replace_transfers( + + /* SPI transfer transformation methods */ + +-extern int spi_split_transfers_maxsize(struct spi_master *master, ++extern int spi_split_transfers_maxsize(struct spi_controller *ctlr, + struct spi_message *msg, + size_t maxsize, + gfp_t gfp); +@@ -1020,8 +1026,8 @@ extern int spi_split_transfers_maxsize(struct spi_master *master, + + extern int spi_sync(struct spi_device *spi, struct spi_message *message); + extern int spi_sync_locked(struct spi_device *spi, struct spi_message *message); +-extern int spi_bus_lock(struct spi_master *master); +-extern int spi_bus_unlock(struct spi_master *master); ++extern int spi_bus_lock(struct spi_controller *ctlr); ++extern int spi_bus_unlock(struct spi_controller *ctlr); + + /** + * spi_sync_transfer - synchronous SPI data transfer +@@ -1206,9 +1212,9 @@ struct spi_flash_read_message { + /* SPI core interface for flash read support */ + static inline bool spi_flash_read_supported(struct spi_device *spi) + { +- return spi->master->spi_flash_read && +- (!spi->master->flash_read_supported || +- spi->master->flash_read_supported(spi)); ++ return spi->controller->spi_flash_read && ++ (!spi->controller->flash_read_supported || ++ spi->controller->flash_read_supported(spi)); + } + + int spi_flash_read(struct spi_device *spi, +@@ -1240,7 +1246,7 @@ int spi_flash_read(struct spi_device *spi, + * @irq: Initializes spi_device.irq; depends on how the board is wired. + * @max_speed_hz: Initializes spi_device.max_speed_hz; based on limits + * from the chip datasheet and board-specific signal quality issues. +- * @bus_num: Identifies which spi_master parents the spi_device; unused ++ * @bus_num: Identifies which spi_controller parents the spi_device; unused + * by spi_new_device(), and otherwise depends on board wiring. + * @chip_select: Initializes spi_device.chip_select; depends on how + * the board is wired. +@@ -1279,7 +1285,7 @@ struct spi_board_info { + + + /* bus_num is board specific and matches the bus_num of some +- * spi_master that will probably be registered later. ++ * spi_controller that will probably be registered later. + * + * chip_select reflects how this chip is wired to that master; + * it's less than num_chipselect. +@@ -1313,7 +1319,7 @@ struct spi_board_info { + /* If you're hotplugging an adapter with devices (parport, usb, etc) + * use spi_new_device() to describe each device. You can also call + * spi_unregister_device() to start making that device vanish, but +- * normally that would be handled by spi_unregister_master(). ++ * normally that would be handled by spi_unregister_controller(). + * + * You can also use spi_alloc_device() and spi_add_device() to use a two + * stage registration sequence for each spi_device. This gives the caller +@@ -1322,13 +1328,13 @@ struct spi_board_info { + * be defined using the board info. + */ + extern struct spi_device * +-spi_alloc_device(struct spi_master *master); ++spi_alloc_device(struct spi_controller *ctlr); + + extern int + spi_add_device(struct spi_device *spi); + + extern struct spi_device * +-spi_new_device(struct spi_master *, struct spi_board_info *); ++spi_new_device(struct spi_controller *, struct spi_board_info *); + + extern void spi_unregister_device(struct spi_device *spi); + +@@ -1336,9 +1342,32 @@ struct spi_board_info { + spi_get_device_id(const struct spi_device *sdev); + + static inline bool +-spi_transfer_is_last(struct spi_master *master, struct spi_transfer *xfer) ++spi_transfer_is_last(struct spi_controller *ctlr, struct spi_transfer *xfer) + { +- return list_is_last(&xfer->transfer_list, &master->cur_msg->transfers); ++ return list_is_last(&xfer->transfer_list, &ctlr->cur_msg->transfers); + } + ++ ++/* Compatibility layer */ ++#define spi_master spi_controller ++ ++#define SPI_MASTER_HALF_DUPLEX SPI_CONTROLLER_HALF_DUPLEX ++#define SPI_MASTER_NO_RX SPI_CONTROLLER_NO_RX ++#define SPI_MASTER_NO_TX SPI_CONTROLLER_NO_TX ++#define SPI_MASTER_MUST_RX SPI_CONTROLLER_MUST_RX ++#define SPI_MASTER_MUST_TX SPI_CONTROLLER_MUST_TX ++ ++#define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr) ++#define spi_master_set_devdata(_ctlr, _data) \ ++ spi_controller_set_devdata(_ctlr, _data) ++#define spi_master_get(_ctlr) spi_controller_get(_ctlr) ++#define spi_master_put(_ctlr) spi_controller_put(_ctlr) ++#define spi_master_suspend(_ctlr) spi_controller_suspend(_ctlr) ++#define spi_master_resume(_ctlr) spi_controller_resume(_ctlr) ++ ++#define spi_register_master(_ctlr) spi_register_controller(_ctlr) ++#define devm_spi_register_master(_dev, _ctlr) \ ++ devm_spi_register_controller(_dev, _ctlr) ++#define spi_unregister_master(_ctlr) spi_unregister_controller(_ctlr) ++ + #endif /* __LINUX_SPI_H */ +diff --git a/include/trace/events/spi.h b/include/trace/events/spi.h +index 7e02c98..f9f702b 100644 +--- a/include/trace/events/spi.h ++++ b/include/trace/events/spi.h +@@ -7,37 +7,37 @@ + #include <linux/ktime.h> + #include <linux/tracepoint.h> + +-DECLARE_EVENT_CLASS(spi_master, ++DECLARE_EVENT_CLASS(spi_controller, + +- TP_PROTO(struct spi_master *master), ++ TP_PROTO(struct spi_controller *controller), + +- TP_ARGS(master), ++ TP_ARGS(controller), + + TP_STRUCT__entry( + __field( int, bus_num ) + ), + + TP_fast_assign( +- __entry->bus_num = master->bus_num; ++ __entry->bus_num = controller->bus_num; + ), + + TP_printk("spi%d", (int)__entry->bus_num) + + ); + +-DEFINE_EVENT(spi_master, spi_master_idle, ++DEFINE_EVENT(spi_controller, spi_controller_idle, + +- TP_PROTO(struct spi_master *master), ++ TP_PROTO(struct spi_controller *controller), + +- TP_ARGS(master) ++ TP_ARGS(controller) + + ); + +-DEFINE_EVENT(spi_master, spi_master_busy, ++DEFINE_EVENT(spi_controller, spi_controller_busy, + +- TP_PROTO(struct spi_master *master), ++ TP_PROTO(struct spi_controller *controller), + +- TP_ARGS(master) ++ TP_ARGS(controller) + + ); + +@@ -54,7 +54,7 @@ + ), + + TP_fast_assign( +- __entry->bus_num = msg->spi->master->bus_num; ++ __entry->bus_num = msg->spi->controller->bus_num; + __entry->chip_select = msg->spi->chip_select; + __entry->msg = msg; + ), +@@ -95,7 +95,7 @@ + ), + + TP_fast_assign( +- __entry->bus_num = msg->spi->master->bus_num; ++ __entry->bus_num = msg->spi->controller->bus_num; + __entry->chip_select = msg->spi->chip_select; + __entry->msg = msg; + __entry->frame = msg->frame_length; +@@ -122,7 +122,7 @@ + ), + + TP_fast_assign( +- __entry->bus_num = msg->spi->master->bus_num; ++ __entry->bus_num = msg->spi->controller->bus_num; + __entry->chip_select = msg->spi->chip_select; + __entry->xfer = xfer; + __entry->len = xfer->len; +-- +1.7.10.4 diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0090-spidev-Do-not-automatically-bind-to-MSIOF-spi-may-be.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0090-spidev-Do-not-automatically-bind-to-MSIOF-spi-may-be.patch new file mode 100644 index 0000000..de7cc2b --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0090-spidev-Do-not-automatically-bind-to-MSIOF-spi-may-be.patch @@ -0,0 +1,26 @@ +From e2fe50b628f660ef35c82b778c5d0c56b5c4487b Mon Sep 17 00:00:00 2001 +From: Andrey Dolnikov <andrey.dolnikov@cogentembedded.com> +Date: Fri, 12 Jan 2018 18:25:33 +0300 +Subject: [PATCH] spidev: Do not automatically bind to MSIOF spi (may be used + as slave). + +Signed-off-by: Andrey Dolnikov <andrey.dolnikov@cogentembedded.com> +--- + drivers/spi/spidev.c | 1 - + 1 file changed, 1 deletion(-) + +diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c +index 203d68c..cbd0b93 100644 +--- a/drivers/spi/spidev.c ++++ b/drivers/spi/spidev.c +@@ -697,7 +697,6 @@ static struct class *spidev_class; + static const struct of_device_id spidev_dt_ids[] = { + { .compatible = "rohm,dh2228fv" }, + { .compatible = "lineartechnology,ltc2488" }, +- { .compatible = "renesas,sh-msiof" }, + { .compatible = "spi-gpio" }, + {}, + }; +-- +2.7.4 + diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/v3msk.cfg b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/v3msk.cfg index 34a385b..7dea6e2 100644 --- a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/v3msk.cfg +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/v3msk.cfg @@ -32,3 +32,6 @@ CONFIG_TOUCHSCREEN_PROPERTIES=y CONFIG_HID_MULTITOUCH=y CONFIG_SERIAL_SH_SCI_DMA=y CONFIG_UIO=y +CONFIG_SPI_SLAVE=y +CONFIG_SPI_SLAVE_TIME=y +CONFIG_SPI_SLAVE_SYSTEM_CONTROL=y diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas_4.9.bbappend b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas_4.9.bbappend index f21ad58..f855641 100644 --- a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas_4.9.bbappend +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas_4.9.bbappend @@ -73,6 +73,14 @@ SRC_URI_append = " \ file://0078-MOST-aim-fix-null-pointer-crash.patch \ file://0079-Revert-dmaengine-rcar-dmac-use-TCRB-instead-of-TCR-f.patch \ file://0082-gpio-pca953x-fix-interrupt-trigger.patch \ + file://0083-spi-Document-DT-bindings-for-SPI-controllers-in-slav.patch \ + file://0084-spi-core-Add-support-for-registering-SPI-slave-contr.patch \ + file://0085-spi-Document-SPI-slave-controller-support.patch \ + file://0086-spi-sh-msiof-Add-slave-mode-support.patch \ + file://0087-spi-slave-Add-SPI-slave-handler-reporting-uptime-at-.patch \ + file://0088-spi-slave-Add-SPI-slave-handler-controlling-system-s.patch \ + file://0089-spi-Generalize-SPI-master-to-controller.patch \ + file://0090-spidev-Do-not-automatically-bind-to-MSIOF-spi-may-be.patch \ file://0103-gpu-drm-rcar-du-Extend-VSP1-DRM-interface.patch \ file://0104-media-vsp1-extend-DRM-VSP1-interface.patch \ file://0105-media-rcar-imr-IMR-driver-updates-for-raw-DL.patch \ |