ARM: dts: add support for GPIO buttons for exynos4412-odroid

This patch adds support for simple GPIO-based button availabled on
Exynos4 based Odroid boards. All supported boards have POWER button,
which has been defined in exynos4412-odroid-common.dtsi. X/X2 boards
also have additional user-configurable button which has been mapped to
KEY_HOME. All defined keys have been marked as possible wakeup source.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

2 files changed, 45 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
index ad2cb32a3439..d1b33a8efa9d 100644
--- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
+++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
@@ -7,6 +7,7 @@
  * published by the Free Software Foundation.
 */
 
+#include <dt-bindings/input/input.h>
 #include "exynos4412.dtsi"
 
 / {
@@ -15,6 +16,22 @@
                 reg = <0x0204F000 0x1000>;
         };
 
+        gpio_keys {
+                compatible = "gpio-keys";
+                pinctrl-names = "default";
+                pinctrl-0 = <&gpio_power_key>;
+
+                power_key {
+                        interrupt-parent = <&gpx1>;
+                        interrupts = <3 0>;
+                        gpios = <&gpx1 3 1>;
+                        linux,code = <KEY_POWER>;
+                        label = "power key";
+                        debounce-interval = <10>;
+                        gpio-key,wakeup;
+                };
+        };
+
         mmc@12550000 {
                 pinctrl-0 = <&sd4_clk &sd4_cmd &sd4_bus4 &sd4_bus8>;
                 pinctrl-names = "default";
@@ -316,3 +333,10 @@
                 status = "okay";
         };
 };
+
+&pinctrl_1 {
+        gpio_power_key: power_key {
+                samsung,pins = "gpx1-3";
+                samsung,pin-pud = <0>;
+        };
+};
diff --git a/arch/arm/boot/dts/exynos4412-odroidx.dts b/arch/arm/boot/dts/exynos4412-odroidx.dts
index 8b453a31410d..cb1cfe7239c4 100644
--- a/arch/arm/boot/dts/exynos4412-odroidx.dts
+++ b/arch/arm/boot/dts/exynos4412-odroidx.dts
@@ -46,6 +46,20 @@
                 status = "okay";
         };
 
+        gpio_keys {
+                pinctrl-0 = <&gpio_power_key &gpio_home_key>;
+
+                home_key {
+                        interrupt-parent = <&gpx2>;
+                        interrupts = <2 0>;
+                        gpios = <&gpx2 2 0>;
+                        linux,code = <KEY_HOME>;
+                        label = "home key";
+                        debounce-interval = <10>;
+                        gpio-key,wakeup;
+                };
+        };
+
         regulator_p3v3 {
                 compatible = "regulator-fixed";
                 regulator-name = "p3v3_en";
@@ -62,3 +76,10 @@
                 status = "okay";
         };
 };
+
+&pinctrl_1 {
+        gpio_home_key: home_key {
+                samsung,pins = "gpx2-2";
+                samsung,pin-pud = <0>;
+        };
+};