ARM: dts: sun4i: Enable tablet keys on Chuwi V7 CW0825

Enable the lradc controlled tablet keys on the Chuwi V7 CW0825 tablet.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts b/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts
index 58214f2495984f03f4c62d3b4006d27269028f57..97fca89eb92b3d7b7d1fdfcf840f88418f818b5b 100644 (file)
--- a/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts
+++ b/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts
@@ -49,6 +49,7 @@
 #include "sun4i-a10.dtsi"
 #include "sunxi-common-regulators.dtsi"
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 
 / {
        model = "Chuwi V7 CW0825";
@@ -74,6 +75,32 @@
        };
 };
 
+&lradc {
+       vref-supply = <&reg_vcc3v0>;
+       status = "okay";
+
+       button@800 {
+               label = "Volume Up";
+               linux,code = <KEY_VOLUMEUP>;
+               channel = <0>;
+               voltage = <800000>;
+       };
+
+       button@1000 {
+               label = "Volume Down";
+               linux,code = <KEY_VOLUMEDOWN>;
+               channel = <0>;
+               voltage = <1000000>;
+       };
+
+       button@1200 {
+               label = "Back";
+               linux,code = <KEY_BACK>;
+               channel = <0>;
+               voltage = <1200000>;
+       };
+};
+
 &mmc0 {
        pinctrl-names = "default";
        pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_reference_design>;