usb: dwc3: omap: convert pdata to of property

Convert our platform_data usage to OF property,
keep the legacy pdata for a while until the complete
conversion is done.
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc3/dwc3-omap.c

@@ -46,6 +46,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/ioport.h>
 #include <linux/io.h>
+#include <linux/of.h>
 #include <linux/module.h>
 
 #include "core.h"
@@ -197,14 +198,18 @@ static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
 static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 {
 	struct dwc3_omap_data	*pdata = pdev->dev.platform_data;
+	struct device_node	*node = pdev->dev.of_node;
+
 	struct platform_device	*dwc3;
 	struct dwc3_omap	*omap;
 	struct resource		*res;
 
 	int			devid;
+	int			size;
 	int			ret = -ENOMEM;
 	int			irq;
 
+	const u32		*utmi_mode;
 	u32			reg;
 
 	void __iomem		*base;
@@ -269,6 +274,10 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 
 	reg = dwc3_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
 
+	utmi_mode = of_get_property(node, "utmi-mode", &size);
+	if (utmi_mode && size == sizeof(*utmi_mode)) {
+		reg |= *utmi_mode;
+	} else {
 		if (!pdata) {
 			dev_dbg(&pdev->dev, "missing platform data\n");
 		} else {
@@ -284,6 +293,7 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
 						pdata->utmi_mode);
 			}
 		}
+	}
 
 	dwc3_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, reg);