target/linux/lantiq/patches-4.4/0040-USB-DWC2-enable-usb-power-gpio.patch

   1 --- a/drivers/usb/dwc2/platform.c
   2 +++ b/drivers/usb/dwc2/platform.c
   3 @@ -42,6 +42,7 @@
   4  #include <linux/dma-mapping.h>
   5  #include <linux/of_device.h>
   6  #include <linux/mutex.h>
   7 +#include <linux/of_gpio.h>
   8  #include <linux/platform_device.h>
   9  #include <linux/phy/phy.h>
  10  #include <linux/platform_data/s3c-hsotg.h>
  11 @@ -336,6 +337,7 @@ static int dwc2_driver_probe(struct plat
  12         struct resource *res;
  13         int retval;
  14         int irq;
  15 +       int gpio_count;
  16
  17         match = of_match_device(dwc2_of_match_table, &dev->dev);
  18         if (match && match->data) {
  19 @@ -352,6 +354,16 @@ static int dwc2_driver_probe(struct plat
  20                 defparams.dma_desc_enable = 0;
  21         }
  22
  23 +       gpio_count = of_gpio_count(dev->dev.of_node);
  24 +       while (gpio_count > 0) {
  25 +               enum of_gpio_flags flags;
  26 +               int gpio = of_get_gpio_flags(dev->dev.of_node, --gpio_count, &flags);
  27 +               if (gpio_request(gpio, "usb"))
  28 +                       continue;
  29 +               dev_info(&dev->dev, "requested GPIO %d\n", gpio);
  30 +               gpio_direction_output(gpio, (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
  31 +       }
  32 +
  33         hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
  34         if (!hsotg)
  35                 return -ENOMEM;