From: Ondrej Jirman <megi@xxxxxx>
These are implemented via regular ADC, so regular polling is needed,
for these keys to work.
Signed-off-by: Martijn Braam <martijn@xxxxxxxxx>
Co-developed-by: Kamil Trzciński <ayufan@xxxxxxxxx>
Signed-off-by: Ondrej Jirman <megi@xxxxxx>
Signed-off-by: Peter Robinson <pbrobinson@xxxxxxxxx>
---
.../dts/rockchip/rk3399-pinephone-pro.dts | 26 +++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
index a0795a2b1cb1..ecd48040eb0c 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
@@ -10,6 +10,7 @@
*/
/dts-v1/;
+#include <dt-bindings/input/gpio-keys.h>
#include <dt-bindings/input/linux-event-codes.h>
#include "rk3399.dtsi"
#include "rk3399-opp.dtsi"
@@ -29,6 +30,26 @@ chosen {
stdout-path = "serial2:115200n8";
};
+ adc-keys {
+ compatible = "adc-keys";
+ io-channels = <&saradc 1>;
+ io-channel-names = "buttons";
+ keyup-threshold-microvolt = <1600000>;
+ poll-interval = <100>;
+
+ 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>;
+ };
+ };
+
gpio-keys {
compatible = "gpio-keys";
pinctrl-names = "default";
@@ -429,6 +450,11 @@ &sdio0 {
status = "okay";
};
+&saradc {
+ vref-supply = <&vcca1v8_s3>;
+ status = "okay";
+};
+
&sdmmc {
bus-width = <4>;
cap-sd-highspeed;
--
2.40.0
