ar71xx: add support for WIFI button on tp-link tl-mr3220v2

The TP-LINK TL-MR3220 v2 has a button on the left side
labeled "WIFI". This is GPIO 24. This patch adds the
support for this button.

Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 36848

target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr741nd-v4.c

@@ -34,6 +34,9 @@
 #define TL_WR741NDV4_GPIO_LED_LAN4	17
 #define TL_WR741NDV4_GPIO_LED_SYSTEM	27
 
+#define TL_MR3220V2_GPIO_BTN_WPS	11
+#define TL_MR3220V2_GPIO_BTN_WIFI	24
+
 #define TL_MR3220V2_GPIO_LED_3G		26
 #define TL_MR3220V2_GPIO_USB_POWER	8
 
@@ -99,7 +102,6 @@ static struct gpio_keys_button tl_wr741ndv4_gpio_keys[] __initdata = {
 		.gpio		= TL_WR741NDV4_GPIO_BTN_RESET,
 		.active_low	= 0,
 	}, {
-		/* the WPS button is only present on the WR741ND v4 */
 		.desc		= "WPS",
 		.type		= EV_KEY,
 		.code		= KEY_WPS_BUTTON,
@@ -109,6 +111,24 @@ static struct gpio_keys_button tl_wr741ndv4_gpio_keys[] __initdata = {
 	}
 };
 
+static struct gpio_keys_button tl_mr3220v2_gpio_keys[] __initdata = {
+	{
+		.desc		= "WPS",
+		.type		= EV_KEY,
+		.code		= KEY_WPS_BUTTON,
+		.debounce_interval = TL_WR741NDV4_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_MR3220V2_GPIO_BTN_WPS,
+		.active_low	= 0,
+	}, {
+		.desc		= "WIFI button",
+		.type		= EV_KEY,
+		.code		= KEY_RFKILL,
+		.debounce_interval = TL_WR741NDV4_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= TL_MR3220V2_GPIO_BTN_WIFI,
+		.active_low	= 0,
+	}
+};
+
 static void __init tl_ap121_setup(void)
 {
 	u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);
@@ -159,8 +179,8 @@ static void __init tl_mr3220v2_setup(void)
 	ath79_register_leds_gpio(-1, ARRAY_SIZE(tl_wr741ndv4_leds_gpio),
 				 tl_wr741ndv4_leds_gpio);
 	ath79_register_gpio_keys_polled(1, TL_WR741NDV4_KEYS_POLL_INTERVAL,
-					ARRAY_SIZE(tl_wr741ndv4_gpio_keys) - 1,
-					tl_wr741ndv4_gpio_keys);
+					ARRAY_SIZE(tl_mr3220v2_gpio_keys),
+					tl_mr3220v2_gpio_keys);
 }
 
 MIPS_MACHINE(ATH79_MACH_TL_MR3220_V2, "TL-MR3220-v2",