ar71xx: Register reset button on UBNT AirGW

The airGateway has a reset button connected to GPIO 12, so we should use it.

Signed-off-by: Matthew Reeve <mreeve@tenxnetworks.com>

SVN-Revision: 41794

target/linux/ar71xx/patches-3.10/722-MIPS-ath79-add-airGateway-support.patch

@@ -12,7 +12,7 @@
  #include "dev-ap9x-pci.h"
  #include "dev-eth.h"
  #include "dev-gpio-buttons.h"
-@@ -389,3 +391,50 @@ static void __init ubnt_nano_m_xw_setup(
+@@ -389,3 +391,65 @@ static void __init ubnt_nano_m_xw_setup(
  
  MIPS_MACHINE(ATH79_MACH_UBNT_NANO_M_XW, "UBNT-NM-XW", "Ubiquiti Nanostation M XW",
  	     ubnt_nano_m_xw_setup);
@@ -27,6 +27,17 @@
 +	},
 +};
 +
++static struct gpio_keys_button airgateway_gpio_keys[] __initdata = {
++	{
++		.desc		= "reset",
++		.type		= EV_KEY,
++		.code		= KEY_RESTART,
++		.debounce_interval	= UBNT_XM_KEYS_DEBOUNCE_INTERVAL,
++		.gpio		= 12,
++		.active_low	= 1,
++	}
++};
++
 +static void __init ubnt_airgateway_setup(void)
 +{
 +	u32 t;
@@ -49,6 +60,10 @@
 +	ath79_register_leds_gpio(-1, ARRAY_SIZE(ubnt_airgateway_gpio_leds),
 +				 ubnt_airgateway_gpio_leds);
 +
++	ath79_register_gpio_keys_polled(-1, UBNT_XM_KEYS_POLL_INTERVAL,
++					ARRAY_SIZE(airgateway_gpio_keys),
++					airgateway_gpio_keys);
++
 +	ath79_init_mac(ath79_eth1_data.mac_addr, mac0, 0);
 +	ath79_init_mac(ath79_eth0_data.mac_addr, mac1, 0);
 +