diff options
Diffstat (limited to 'meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0073-MOST-dim2-add-device-tree-support.patch')
| -rw-r--r-- | meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0073-MOST-dim2-add-device-tree-support.patch | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0073-MOST-dim2-add-device-tree-support.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0073-MOST-dim2-add-device-tree-support.patch new file mode 100644 index 0000000..b3e2e0b --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0073-MOST-dim2-add-device-tree-support.patch @@ -0,0 +1,169 @@ +From cc64770782e6bb01b2d8b76c1731a28d5d06d135 Mon Sep 17 00:00:00 2001 +From: Andrey Gusakov <andrey.gusakov@cogentembedded.com> +Date: Fri, 7 Jul 2017 20:42:36 +0300 +Subject: [PATCH] MOST: dim2: add device tree support + +Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com> +--- + drivers/staging/most/hdm-dim2/dim2_hdm.c | 72 ++++++++++++++++++++++---------- + 1 file changed, 50 insertions(+), 22 deletions(-) + +diff --git a/drivers/staging/most/hdm-dim2/dim2_hdm.c b/drivers/staging/most/hdm-dim2/dim2_hdm.c +index a36449551513..f28f169180fe 100644 +--- a/drivers/staging/most/hdm-dim2/dim2_hdm.c ++++ b/drivers/staging/most/hdm-dim2/dim2_hdm.c +@@ -14,6 +14,7 @@ + #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + + #include <linux/module.h> ++#include <linux/of_platform.h> + #include <linux/printk.h> + #include <linux/kernel.h> + #include <linux/init.h> +@@ -21,6 +22,7 @@ + #include <linux/interrupt.h> + #include <linux/slab.h> + #include <linux/io.h> ++#include <linux/clk.h> + #include <linux/dma-mapping.h> + #include <linux/sched.h> + #include <linux/kthread.h> +@@ -101,6 +103,7 @@ struct dim2_hdm { + struct most_interface most_iface; + char name[16 + sizeof "dim2-"]; + void __iomem *io_base; ++ struct clk *clk; + int clk_speed; + struct task_struct *netinfo_task; + wait_queue_head_t netinfo_waitq; +@@ -165,6 +168,27 @@ void dimcb_on_error(u8 error_id, const char *error_message) + error_message); + } + ++static int dim_parce_speed(const char *clock_speed) ++{ ++ if (!strcmp(clock_speed, "256fs")) ++ return CLK_256FS; ++ else if (!strcmp(clock_speed, "512fs")) ++ return CLK_512FS; ++ else if (!strcmp(clock_speed, "1024fs")) ++ return CLK_1024FS; ++ else if (!strcmp(clock_speed, "2048fs")) ++ return CLK_2048FS; ++ else if (!strcmp(clock_speed, "3072fs")) ++ return CLK_3072FS; ++ else if (!strcmp(clock_speed, "4096fs")) ++ return CLK_4096FS; ++ else if (!strcmp(clock_speed, "6144fs")) ++ return CLK_6144FS; ++ else if (!strcmp(clock_speed, "8192fs")) ++ return CLK_8192FS; ++ return -1; ++} ++ + /** + * startup_dim - initialize the dim2 interface + * @pdev: platform device +@@ -178,32 +202,12 @@ static int startup_dim(struct platform_device *pdev) + struct dim2_platform_data *pdata = pdev->dev.platform_data; + u8 hal_ret; + +- dev->clk_speed = -1; +- +- if (clock_speed) { +- if (!strcmp(clock_speed, "256fs")) +- dev->clk_speed = CLK_256FS; +- else if (!strcmp(clock_speed, "512fs")) +- dev->clk_speed = CLK_512FS; +- else if (!strcmp(clock_speed, "1024fs")) +- dev->clk_speed = CLK_1024FS; +- else if (!strcmp(clock_speed, "2048fs")) +- dev->clk_speed = CLK_2048FS; +- else if (!strcmp(clock_speed, "3072fs")) +- dev->clk_speed = CLK_3072FS; +- else if (!strcmp(clock_speed, "4096fs")) +- dev->clk_speed = CLK_4096FS; +- else if (!strcmp(clock_speed, "6144fs")) +- dev->clk_speed = CLK_6144FS; +- else if (!strcmp(clock_speed, "8192fs")) +- dev->clk_speed = CLK_8192FS; +- } ++ if (clock_speed) ++ dev->clk_speed = dim_parce_speed(clock_speed); + + if (dev->clk_speed == -1) { + pr_info("Bad or missing clock speed parameter, using default value: 3072fs\n"); + dev->clk_speed = CLK_3072FS; +- } else { +- pr_info("Selected clock speed: %s\n", clock_speed); + } + if (pdata && pdata->init) { + int ret = pdata->init(pdata, dev->io_base, dev->clk_speed); +@@ -735,6 +739,7 @@ static int dim2_probe(struct platform_device *pdev) + int ret, i; + struct kobject *kobj; + int irq; ++ struct device_node *np = pdev->dev.of_node; + + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); + if (!dev) +@@ -765,6 +770,14 @@ static int dim2_probe(struct platform_device *pdev) + dev_err(&pdev->dev, "failed to request mlb_int irq %d\n", irq); + return ret; + } ++ ++ dev->clk = devm_clk_get(&pdev->dev, NULL); ++ if (IS_ERR(dev->clk)) { ++ dev_err(&pdev->dev, "cannot get clock\n"); ++ ret = PTR_ERR(dev->clk); ++ return ret; ++ } ++ clk_prepare_enable(dev->clk); + + init_waitqueue_head(&dev->netinfo_waitq); + dev->deliver_netinfo = 0; +@@ -814,6 +827,12 @@ static int dim2_probe(struct platform_device *pdev) + dev->most_iface.poison_channel = poison_channel; + dev->most_iface.request_netinfo = request_netinfo; + ++ if (np) { ++ const char *tmp; ++ if (!of_property_read_string(np, "clock-speed", &tmp)) ++ dev->clk_speed = dim_parce_speed(tmp); ++ } ++ + kobj = most_register_interface(&dev->most_iface); + if (IS_ERR(kobj)) { + ret = PTR_ERR(kobj); +@@ -866,6 +885,8 @@ static int dim2_remove(struct platform_device *pdev) + most_deregister_interface(&dev->most_iface); + kthread_stop(dev->netinfo_task); + ++ clk_disable_unprepare(dev->clk); ++ + /* + * break link to local platform_device_id struct + * to prevent crash by unload platform device module +@@ -882,12 +903,19 @@ static struct platform_device_id dim2_id[] = { + + MODULE_DEVICE_TABLE(platform, dim2_id); + ++static const struct of_device_id dim2_of_match[] = { ++ { .compatible = "rcar,medialb-dim2", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, dim2_of_match); ++ + static struct platform_driver dim2_driver = { + .probe = dim2_probe, + .remove = dim2_remove, + .id_table = dim2_id, + .driver = { + .name = "hdm_dim2", ++ .of_match_table = dim2_of_match, + }, + }; + +-- +2.13.0 + |