ar71xx: wndr4300: enable 5V power for the USB port

The 5V power of the USB is controlled by a GPIO pin of
the external WiFi chip. Setup the GPIO bitmasks in the
platform data of the WiFi chip to ensure that the 5V
power gets enabled by the ath9k driver.

Based on the the WNDR3700v4 support patch from Ralph Perlich:
  http://patchwork.openwrt.org/patch/4763/

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 40478

target/linux/ar71xx/files/arch/mips/ath79/mach-wndr4300.c

@@ -31,6 +31,7 @@
 #include "dev-wmac.h"
 #include "machtypes.h"
 
+/* AR9344 GPIOs */
 #define WNDR4300_GPIO_LED_POWER_GREEN	0
 #define WNDR4300_GPIO_LED_POWER_AMBER	2
 #define WNDR4300_GPIO_LED_USB		13
@@ -45,6 +46,9 @@
 #define WNDR4300_GPIO_BTN_WIRELESS	15
 #define WNDR4300_GPIO_BTN_WPS		12
 
+/* AR9580 GPIOs */
+#define WNDR4300_GPIO_USB_5V		0
+
 #define WNDR4300_KEYS_POLL_INTERVAL	20	/* msecs */
 #define WNDR4300_KEYS_DEBOUNCE_INTERVAL	(3 * WNDR4300_KEYS_POLL_INTERVAL)
 
@@ -192,6 +196,11 @@ static void __init wndr4300_setup(void)
 	ath79_register_usb();
 
 	ath79_register_wmac_simple();
+
+	/* enable power for the USB port */
+	ap9x_pci_setup_wmac_gpio(0, BIT(WNDR4300_GPIO_USB_5V),
+				 BIT(WNDR4300_GPIO_USB_5V));
+
 	ap91_pci_init_simple();
 }