Commit d3150ed5 authored by Ondrej Jirman's avatar Ondrej Jirman Committed by Heiko Stuebner
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arm64: dts: rockchip: Add support for volume keys to rk3399-pinephone-pro 



These are implemented via regular ADC, so regular polling is needed,
for these keys to work.

Co-developed-by: default avatarMartijn Braam <martijn@brixit.nl>
Signed-off-by: default avatarMartijn Braam <martijn@brixit.nl>
Co-developed-by: default avatarKamil Trzciński <ayufan@ayufan.eu>
Signed-off-by: default avatarKamil Trzciński <ayufan@ayufan.eu>
Signed-off-by: default avatarOndrej Jirman <megi@xff.cz>
Signed-off-by: default avatarPeter Robinson <pbrobinson@gmail.com>
Tested-by: default avatarOndrej Jirman <megi@xff.cz>
Link: https://lore.kernel.org/r/20230405123813.2272919-1-pbrobinson@gmail.com


[increased Volume-Down voltage to 600mV as suggested by Ondrej]
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent 1bb69cd4

arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts

+26 −0
Original line number Diff line number Diff line
@@ -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 @@ 
		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 = <600000>;

		};

	};



	backlight: backlight {

		compatible = "pwm-backlight";

		pwms = <&pwm0 0 50000 0>;
@@ -519,6 +540,11 @@ 
	status = "okay";

};



&saradc {

	vref-supply = <&vcca1v8_s3>;

	status = "okay";

};



&sdmmc {

	bus-width = <4>;

	cap-sd-highspeed;