openwrtv3/target/linux/lantiq/patches-3.18/0040-USB-DWC2-enable-usb-power-gpio.patch

--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -40,6 +40,7 @@
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 
 #include <linux/usb/of.h>
@@ -154,6 +155,7 @@ static int dwc2_driver_probe(struct plat
 	struct resource *res;
 	int retval;
 	int irq;
+	int gpio_count;
 
 	if (usb_disabled())
 		return -ENODEV;
@@ -173,6 +175,16 @@ static int dwc2_driver_probe(struct plat
 		defparams.dma_desc_enable = 0;
 	}
 
+	gpio_count = of_gpio_count(dev->dev.of_node);
+	while (gpio_count > 0) {
+		enum of_gpio_flags flags;
+		int gpio = of_get_gpio_flags(dev->dev.of_node, --gpio_count, &flags);
+		if (gpio_request(gpio, "usb"))
+			continue;
+		dev_info(&dev->dev, "requested GPIO %d\n", gpio);
+		gpio_direction_output(gpio, (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
+	}
+
 	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
 	if (!hsotg)
 		return -ENOMEM;