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>

diff --git a/arch/arm/boot/dts/imx6sx-sdb.dts b/arch/arm/boot/dts/imx6sx-sdb.dts
index 9906f654e494ff54a3c1e7f3ab8101e62d061436..da40f139679866ab0b8e9a0f3727143492372474 100644 (file)
--- 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