usb: musb: omap: Add device tree support for omap musb glue

Added device tree support for omap musb driver and updated the
Documentation with device tree binding information.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index f4d95037db5d..d96873ba97c7 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -30,6 +30,7 @@
 #include <linux/init.h>
 #include <linux/list.h>
 #include <linux/io.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/pm_runtime.h>
@@ -470,8 +471,11 @@ static u64 omap2430_dmamask = DMA_BIT_MASK(32);
 static int __devinit omap2430_probe(struct platform_device *pdev)
 {
         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
+        struct omap_musb_board_data     *data;
         struct platform_device          *musb;
         struct omap2430_glue            *glue;
+        struct device_node              *np = pdev->dev.of_node;
+        struct musb_hdrc_config         *config;
         struct resource                 *res;
         int                             ret = -ENOMEM;
 
@@ -501,6 +505,42 @@ static int __devinit omap2430_probe(struct platform_device *pdev)
         if (glue->control_otghs == NULL)
                 dev_dbg(&pdev->dev, "Failed to obtain control memory\n");
 
+        if (np) {
+                pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+                if (!pdata) {
+                        dev_err(&pdev->dev,
+                                "failed to allocate musb platfrom data\n");
+                        ret = -ENOMEM;
+                        goto err1;
+                }
+
+                data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+                if (!data) {
+                        dev_err(&pdev->dev,
+                                        "failed to allocate musb board data\n");
+                        ret = -ENOMEM;
+                        goto err1;
+                }
+
+                config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
+                if (!data) {
+                        dev_err(&pdev->dev,
+                                "failed to allocate musb hdrc config\n");
+                        goto err1;
+                }
+
+                of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
+                of_property_read_u32(np, "interface_type",
+                                                (u32 *)&data->interface_type);
+                of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps);
+                of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);
+                of_property_read_u32(np, "power", (u32 *)&pdata->power);
+                config->multipoint = of_property_read_bool(np, "multipoint");
+
+                pdata->board_data       = data;
+                pdata->config           = config;
+        }
+
         pdata->platform_ops             = &omap2430_ops;
 
         platform_set_drvdata(pdev, glue);
@@ -597,12 +637,26 @@ static struct dev_pm_ops omap2430_pm_ops = {
 #define DEV_PM_OPS      NULL
 #endif
 
+#ifdef CONFIG_OF
+static const struct of_device_id omap2430_id_table[] = {
+        {
+                .compatible = "ti,omap4-musb"
+        },
+        {
+                .compatible = "ti,omap3-musb"
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, omap2430_id_table);
+#endif
+
 static struct platform_driver omap2430_driver = {
         .probe          = omap2430_probe,
         .remove         = __devexit_p(omap2430_remove),
         .driver         = {
                 .name   = "musb-omap2430",
                 .pm     = DEV_PM_OPS,
+                .of_match_table = of_match_ptr(omap2430_id_table),
         },
 };