ENGR00306156 ARM: dts: imx6sx-sdb: add gpio key support

Add GPIO key support on i.MX6SX-SDB, see below mapping:

KEY_FUNC1 -> KEY_VOLUMEUP;
KEY_FUNC2 -> KEY_VOLUMEDOWN;

Signed-off-by: Anson Huang <b20788@freescale.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/imx6sx-sdb.dts b/arch/arm/boot/dts/imx6sx-sdb.dts
index 9d8802e04cff..6b1e7a426b47 100644
--- a/arch/arm/boot/dts/imx6sx-sdb.dts
+++ b/arch/arm/boot/dts/imx6sx-sdb.dts
@@ -8,6 +8,7 @@
 
 /dts-v1/;
 
+#include <dt-bindings/gpio/gpio.h>
 #include "imx6sx.dtsi"
 
 / {
@@ -101,6 +102,22 @@
 
         };
 
+        gpio-keys {
+                compatible = "gpio-keys";
+
+                volume-up {
+                        label = "Volume Up";
+                        gpios = <&gpio1 18 GPIO_ACTIVE_LOW>;
+                        linux,code = <115>; /* KEY_VOLUMEUP */
+                };
+
+                volume-down {
+                        label = "Volume Down";
+                        gpios = <&gpio1 19 GPIO_ACTIVE_LOW>;
+                        linux,code = <114>; /* KEY_VOLUMEDOWN */
+                };
+        };
+
         sound {
                 compatible = "fsl,imx6q-sabresd-wm8962",
                            "fsl,imx-audio-wm8962";
@@ -376,6 +393,8 @@
                                 MX6SX_PAD_QSPI1B_DATA1__GPIO4_IO_25 0x17059
                                 MX6SX_PAD_QSPI1B_DATA2__GPIO4_IO_26 0x17059
                                 MX6SX_PAD_QSPI1B_DATA3__GPIO4_IO_27 0x17059
+                                MX6SX_PAD_CSI_DATA04__GPIO1_IO_18 0x17059
+                                MX6SX_PAD_CSI_DATA05__GPIO1_IO_19 0x17059
                         >;
                 };
         };