ARM64: dts: meson-axg: add adc buttons the S400

Add the 6 adc buttons of the amlogic S400

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
index da84bc853d754fc396ed4fc584d2ab001bdbeb70..9189a5778d76f3a605f9680911706037e2ac9438 100644 (file)
--- a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
@@ -6,11 +6,55 @@
 /dts-v1/;
 
 #include "meson-axg.dtsi"
+#include <dt-bindings/input/input.h>
 
 / {
        compatible = "amlogic,s400", "amlogic,a113d", "amlogic,meson-axg";
        model = "Amlogic Meson AXG S400 Development Board";
 
+       adc_keys {
+               compatible = "adc-keys";
+               io-channels = <&saradc 0>;
+               io-channel-names = "buttons";
+               keyup-threshold-microvolt = <1800000>;
+
+               button-next {
+                       label = "Next";
+                       linux,code = <KEY_NEXT>;
+                       press-threshold-microvolt = <1116000>; /* 62% */
+               };
+
+               button-prev {
+                       label = "Previous";
+                       linux,code = <KEY_PREVIOUS>;
+                       press-threshold-microvolt = <900000>; /* 50% */
+               };
+
+               button-wifi {
+                       label = "Wifi";
+                       linux,code = <KEY_WLAN>;
+                       press-threshold-microvolt = <684000>; /* 38% */
+               };
+
+               button-up {
+                       label = "Volume Up";
+                       linux,code = <KEY_VOLUMEUP>;
+                       press-threshold-microvolt = <468000>; /* 26% */
+               };
+
+               button-down {
+                       label = "Volume Down";
+                       linux,code = <KEY_VOLUMEDOWN>;
+                       press-threshold-microvolt = <252000>; /* 14% */
+               };
+
+               button-voice {
+                       label = "Voice";
+                       linux,code = <KEY_VOICECOMMAND>;
+                       press-threshold-microvolt = <0>; /* 0% */
+               };
+       };
+
        aliases {
                serial0 = &uart_AO;
                serial1 = &uart_A;