diff options
Diffstat (limited to 'meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0011-can-rcar_canfd-add-enable-and-standby-control-pins.patch')
| -rw-r--r-- | meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0011-can-rcar_canfd-add-enable-and-standby-control-pins.patch | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0011-can-rcar_canfd-add-enable-and-standby-control-pins.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0011-can-rcar_canfd-add-enable-and-standby-control-pins.patch new file mode 100644 index 0000000..60834a9 --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0011-can-rcar_canfd-add-enable-and-standby-control-pins.patch @@ -0,0 +1,119 @@ +From 0f55d888c83aed7ea5a10761edaff52de8dc06a1 Mon Sep 17 00:00:00 2001 +From: Vladimir Barinov <vladimir.barinov@cogentembedded.com> +Date: Mon, 30 May 2016 01:51:47 +0300 +Subject: [PATCH] can: rcar_canfd: add enable and standby control pins + +Add enable and standby can transceiver control pins + +Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> +--- + .../devicetree/bindings/net/can/rcar_canfd.txt | 5 +++ + drivers/net/can/rcar/rcar_canfd.c | 48 ++++++++++++++++++---- + 2 files changed, 44 insertions(+), 9 deletions(-) + +diff --git a/Documentation/devicetree/bindings/net/can/rcar_canfd.txt b/Documentation/devicetree/bindings/net/can/rcar_canfd.txt +index 4299bd8..eede77a 100644 +--- a/Documentation/devicetree/bindings/net/can/rcar_canfd.txt ++++ b/Documentation/devicetree/bindings/net/can/rcar_canfd.txt +@@ -16,6 +16,7 @@ Required properties: + - clock-names: 3 clock input name strings: "fck", "canfd", "can_clk". + - pinctrl-0: pin control group to be used for this controller. + - pinctrl-names: must be "default". ++- gpios: GPIO used for controlling the enable pin and standby pin + + Required child nodes: + The controller supports two channels and each is represented as a child node. +@@ -49,6 +50,10 @@ SoC common .dtsi file: + power-domains = <&cpg>; + status = "disabled"; + ++ gpios = <&gpio5 29 GPIO_ACTIVE_HIGH /* enable */ ++ &gpio5 30 GPIO_ACTIVE_LOW /* standby */ ++ >; ++ + channel0 { + status = "disabled"; + }; +diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c +index 15a14c5..4aa670d 100644 +--- a/drivers/net/can/rcar/rcar_canfd.c ++++ b/drivers/net/can/rcar/rcar_canfd.c +@@ -21,6 +21,7 @@ + #include <linux/clk.h> + #include <linux/of.h> + #include <linux/of_device.h> ++#include <linux/of_gpio.h> + #include <linux/bitmap.h> + #include <linux/bitops.h> + #include <linux/iopoll.h> +@@ -386,6 +387,8 @@ struct rcar_canfd_global { + enum rcar_canfd_fcanclk fcan; /* CANFD or Ext clock */ + unsigned long channels_mask; /* Enabled channels mask */ + bool fdmode; /* CAN FD or Classical CAN only mode */ ++ unsigned int enable_pin; /* transceiver enable */ ++ unsigned int standby_pin; /* transceiver standby */ + }; + + /* CAN FD mode nominal rate constants */ +@@ -1063,6 +1066,10 @@ static int rcar_canfd_open(struct net_device *ndev) + struct rcar_canfd_global *gpriv = priv->gpriv; + int err; + ++ /* transceiver normal mode */ ++ if (gpio_is_valid(gpriv->standby_pin)) ++ gpio_set_value(gpriv->standby_pin, 1); ++ + /* Peripheral clock is already enabled in probe */ + err = clk_prepare_enable(gpriv->can_clk); + if (err) { +@@ -1131,6 +1138,9 @@ static int rcar_canfd_close(struct net_device *ndev) + clk_disable_unprepare(gpriv->can_clk); + close_candev(ndev); + can_led_event(ndev, CAN_LED_EVENT_STOP); ++ /* transceiver stanby mode */ ++ if (gpio_is_valid(gpriv->standby_pin)) ++ gpio_set_value(gpriv->standby_pin, 0); + return 0; + } + +@@ -1409,8 +1419,9 @@ static int rcar_canfd_probe(struct platform_device *pdev) + struct rcar_canfd_global *gpriv; + struct device_node *of_child; + unsigned long channels_mask = 0; +- int err, ch_irq, g_irq; ++ int err, ret, ch_irq, g_irq; + bool fdmode = true; /* CAN FD only mode - default */ ++ enum of_gpio_flags enable_flags, standby_flags; + + if (of_property_read_bool(pdev->dev.of_node, "renesas,no-can-fd")) + fdmode = false; /* Classical CAN only mode */ +@@ -1552,6 +1555,26 @@ static int rcar_canfd_probe(struct platform_device *pdev) + goto fail_channel; + } + ++ gpriv->enable_pin = of_get_gpio_flags(pdev->dev.of_node, 0, &enable_flags); ++ gpriv->standby_pin = of_get_gpio_flags(pdev->dev.of_node, 1, &standby_flags); ++ ++ if (gpio_is_valid(gpriv->enable_pin)) { ++ int val = enable_flags & OF_GPIO_ACTIVE_LOW ? ++ GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH; ++ ret = devm_gpio_request_one(&pdev->dev, gpriv->enable_pin, val, "enable"); ++ if (ret) ++ dev_info(&pdev->dev, "Failed to request enable pin\n"); ++ } ++ ++ if (gpio_is_valid(gpriv->standby_pin)) { ++ int val = standby_flags & OF_GPIO_ACTIVE_LOW ? ++ GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH; ++ /* transceiver standby mode */ ++ ret = devm_gpio_request_one(&pdev->dev, gpriv->standby_pin, val, "standby"); ++ if (ret) ++ dev_info(&pdev->dev, "Failed to request standby pin\n"); ++ } ++ + platform_set_drvdata(pdev, gpriv); + dev_info(&pdev->dev, "global operational state (clk %d, fdmode %d)\n", + gpriv->fcan, gpriv->fdmode); +-- +1.9.1 + |