mac80211: ath9k: add GPIO support for AR9280 chip

Enable access to GPIO on Atheros wireless chip AR9280.
Support for 9280 is added to existing 9285/9287 subsystem
because these 3 chips differ only in number of GPIO pins.

Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>

SVN-Revision: 49251

package/kernel/mac80211/patches/550-ath9k_add_ar9280_gpio_chip.patch

@@ -0,0 +1,27 @@
+From: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
+Date: Thu, 21 Apr 2016 23:00:54 +0200
+Subject: [PATCH] mac80211: ath9k: add GPIO support for AR9280 chip
+
+Enable access to GPIO on Atheros wireless chip AR9280.
+Support for 9280 is added to existing 9285/9287 subsystem
+because these 3 chips differ only in number of GPIO pins.
+
+Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
+---
+--- a/drivers/net/wireless/ath/ath9k/gpio.c
++++ b/drivers/net/wireless/ath/ath9k/gpio.c
+@@ -88,11 +88,13 @@ static void ath9k_register_gpio_chip(str
+ 	struct ath9k_gpio_chip *gc;
+ 	u16 ng;
+ 
+-	/* for now only AR9285 and AR9287 are recognized */
++	/* supported chips are AR9280, AR9285 and AR9287 */
+ 	if (AR_SREV_9287(sc->sc_ah))
+ 		ng = AR9287_NUM_GPIO;
+ 	else if (AR_SREV_9285(sc->sc_ah))
+ 		ng = AR9285_NUM_GPIO;
++	else if (AR_SREV_9280(sc->sc_ah))
++		ng = AR928X_NUM_GPIO;
+ 	else
+ 		return;
+