ARM: dts: imx6sx-sdb: add gpio key support

This patch adds support for imx6sx-sdb board's gpio keys:

SW4(FUNC1): KEY_VOLUMEUP
SW5(FUNC2): KEY_VOLUMEDOWN

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/imx6sx-sdb.dts b/arch/arm/boot/dts/imx6sx-sdb.dts
index 9906f654e494..da40f1396798 100644
--- a/arch/arm/boot/dts/imx6sx-sdb.dts
+++ b/arch/arm/boot/dts/imx6sx-sdb.dts
@@ -8,6 +8,8 @@
 
 /dts-v1/;
 
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 #include "imx6sx.dtsi"
 
 / {
@@ -22,6 +24,24 @@
                 reg = <0x80000000 0x40000000>;
         };
 
+        gpio-keys {
+                compatible = "gpio-keys";
+                pinctrl-names = "default";
+                pinctrl-0 = <&pinctrl_gpio_keys>;
+
+                volume-up {
+                        label = "Volume Up";
+                        gpios = <&gpio1 18 GPIO_ACTIVE_LOW>;
+                        linux,code = <KEY_VOLUMEUP>;
+                };
+
+                volume-down {
+                        label = "Volume Down";
+                        gpios = <&gpio1 19 GPIO_ACTIVE_LOW>;
+                        linux,code = <KEY_VOLUMEDOWN>;
+                };
+        };
+
         regulators {
                 compatible = "simple-bus";
                 #address-cells = <1>;
@@ -114,6 +134,13 @@
                         >;
                 };
 
+                pinctrl_gpio_keys: gpio_keysgrp {
+                        fsl,pins = <
+                                MX6SX_PAD_CSI_DATA04__GPIO1_IO_18 0x17059
+                                MX6SX_PAD_CSI_DATA05__GPIO1_IO_19 0x17059
+                        >;
+                };
+
                 pinctrl_vcc_sd3: vccsd3grp {
                         fsl,pins = <
                                 MX6SX_PAD_KEY_COL1__GPIO2_IO_11         0x17059