ARM: dts: sun8i: tbs-a711: Add support for volume keys input

TBS A711 tablet has volume up/down keys connected to r_lradc. Add
support for these keys.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

diff --git a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
index 87c04d4..66d0780 100644 (file)
--- a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
@@ -46,6 +46,7 @@
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/pwm/pwm.h>
+#include <dt-bindings/input/input.h>
 
 / {
        model = "TBS A711 Tablet";
@@ -219,6 +220,25 @@
        status = "okay";
 };
 
+&r_lradc {
+       vref-supply = <&reg_aldo2>;
+       status = "okay";
+
+       button@210 {
+               label = "Volume Up";
+               linux,code = <KEY_VOLUMEUP>;
+               channel = <0>;
+               voltage = <210000>;
+       };
+
+       button@410 {
+               label = "Volume Down";
+               linux,code = <KEY_VOLUMEDOWN>;
+               channel = <0>;
+               voltage = <410000>;
+       };
+};
+
 &r_rsb {
        status = "okay";