ARM: dts: omap3-sniper: TWL4030 keypad support

This adds support for the volume and gesture keys, using TWL4030 keypad.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3-sniper.dts

@@ -8,6 +8,7 @@
 /dts-v1/;
 
 #include "omap36xx.dtsi"
+#include <dt-bindings/input/input.h>
 
 / {
 	model = "LG Optimus Black";
@@ -226,6 +227,14 @@ &usb_otg_hs {
 #include "twl4030.dtsi"
 #include "twl4030_omap3.dtsi"
 
+&twl_keypad {
+	linux,keymap = <
+		MATRIX_KEY(0x00, 0x00, KEY_VOLUMEUP)
+		MATRIX_KEY(0x01, 0x00, KEY_VOLUMEDOWN)
+		MATRIX_KEY(0x02, 0x00, KEY_SELECT)
+	>;
+};
+
 /*
  * The TWL4030 VAUX2 and VDAC regulators power sensors that are slaves on I2C3.
  * When not powered, these sensors cause the I2C3 clock to stay low at all times,