usb: renesas_usbhs: Add device tree support for R-Car H2 and M2

This driver supports other SoCs, but they need boards/Soc depend code.
So, this patch adds device tree support for R-Car H2 and M2 initially.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 1b9bf8d83235b50d1efc0f971a8443ac2783d159..b3b6813ab270c046f9cf70ab99aa11821e2a7b0b 100644 (file)
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -18,6 +18,8 @@
 #include <linux/gpio.h>
 #include <linux/io.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <linux/sysfs.h>
@@ -438,6 +440,43 @@ static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
 /*
  *             platform functions
  */
+static const struct of_device_id usbhs_of_match[] = {
+       {
+               .compatible = "renesas,usbhs-r8a7790",
+               .data = (void *)USBHS_TYPE_R8A7790,
+       },
+       {
+               .compatible = "renesas,usbhs-r8a7791",
+               .data = (void *)USBHS_TYPE_R8A7791,
+       },
+       { },
+};
+MODULE_DEVICE_TABLE(of, usbhs_of_match);
+
+static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
+{
+       struct renesas_usbhs_platform_info *info;
+       struct renesas_usbhs_driver_param *dparam;
+       const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
+       u32 tmp;
+       int gpio;
+
+       info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+       if (!info)
+               return NULL;
+
+       dparam = &info->driver_param;
+       dparam->type = of_id ? (u32)of_id->data : 0;
+       if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
+               dparam->buswait_bwait = tmp;
+       gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
+                                      NULL);
+       if (gpio > 0)
+               dparam->enable_gpio = gpio;
+
+       return info;
+}
+
 static int usbhs_probe(struct platform_device *pdev)
 {
        struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
@@ -446,6 +485,10 @@ static int usbhs_probe(struct platform_device *pdev)
        struct resource *res, *irq_res;
        int ret;
 
+       /* check device node */
+       if (pdev->dev.of_node)
+               info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
+
        /* check platform information */
        if (!info) {
                dev_err(&pdev->dev, "no platform information\n");
@@ -689,6 +732,7 @@ static struct platform_driver renesas_usbhs_driver = {
        .driver         = {
                .name   = "renesas_usbhs",
                .pm     = &usbhsc_pm_ops,
+               .of_match_table = of_match_ptr(usbhs_of_match),
        },
        .probe          = usbhs_probe,
        .remove         = usbhs_remove,