rk3288-evb have many tablet-used adc buttons.
Signed-off-by: Jacob Chen <jacob-chen@xxxxxxxxxx>
---
arch/arm/boot/dts/rk3288-evb.dtsi | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/arch/arm/boot/dts/rk3288-evb.dtsi b/arch/arm/boot/dts/rk3288-evb.dtsi
index 9cee856..835ddb8 100644
--- a/arch/arm/boot/dts/rk3288-evb.dtsi
+++ b/arch/arm/boot/dts/rk3288-evb.dtsi
@@ -48,6 +48,43 @@
reg = <0x0 0x80000000>;
};
+ adc-keys {
+ compatible = "adc-keys";
+ io-channels = <&saradc 1>;
+ io-channel-names = "buttons";
+ keyup-threshold-microvolt = <1800000>;
+
+ button-up {
+ label = "Volume Up";
+ linux,code = <KEY_VOLUMEUP>;
+ press-threshold-microvolt = <100000>;
+ };
+
+ button-down {
+ label = "Volume Down";
+ linux,code = <KEY_VOLUMEDOWN>;
+ press-threshold-microvolt = <300000>;
+ };
+
+ menu {
+ label = "Menu";
+ linux,code = <KEY_MENU>;
+ press-threshold-microvolt = <640000>;
+ };
+
+ esc {
+ label = "Esc";
+ linux,code = <KEY_ESC>;
+ press-threshold-microvolt = <1000000>;
+ };
+
+ home {
+ label = "Home";
+ linux,code = <KEY_HOME>;
+ press-threshold-microvolt = <1300000>;
+ };
+ };
+
backlight: backlight {
compatible = "pwm-backlight";
brightness-levels = <
--
2.7.4
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