[PATCH v2 12/30] arm64: dts: rockchip: Add maskrom button to Radxa E20C

[Kever Yang]

On 2025/4/8 06:46, Jonas Karlman wrote:
> Radxa E20C has two buttons, one SARADC maskrom button and one GPIO user
> button.
>
> Add support for the maskrom button using a adc-keys node, also add the
> regulators used by SARADC controller.
>
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
> Link: https://lore.kernel.org/r/20250304201642.831218-5-jonas@kwiboo.se
> Signed-off-by: Heiko Stuebner <heiko at sntech.de>
>
> [ upstream commit: 3a2819ee9c71d1c6388e456cc4eb042914d15d7e ]
>
> (cherry picked from commit 460ef5b623e5fa69843305faf50f6b1a8e81e1cd)
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
>   .../src/arm64/rockchip/rk3528-radxa-e20c.dts  | 48 +++++++++++++++++++
>   1 file changed, 48 insertions(+)
>
> diff --git a/dts/upstream/src/arm64/rockchip/rk3528-radxa-e20c.dts b/dts/upstream/src/arm64/rockchip/rk3528-radxa-e20c.dts
> index b378774d2a4e..5346ef457c2a 100644
> --- a/dts/upstream/src/arm64/rockchip/rk3528-radxa-e20c.dts
> +++ b/dts/upstream/src/arm64/rockchip/rk3528-radxa-e20c.dts
> @@ -19,6 +19,20 @@
>   		stdout-path = "serial0:1500000n8";
>   	};
>   
> +	adc-keys {
> +		compatible = "adc-keys";
> +		io-channels = <&saradc 0>;
> +		io-channel-names = "buttons";
> +		keyup-threshold-microvolt = <1800000>;
> +		poll-interval = <100>;
> +
> +		button-maskrom {
> +			label = "MASKROM";
> +			linux,code = <KEY_SETUP>;
> +			press-threshold-microvolt = <0>;
> +		};
> +	};
> +
>   	gpio-keys {
>   		compatible = "gpio-keys";
>   		pinctrl-names = "default";
> @@ -61,6 +75,35 @@
>   			linux,default-trigger = "netdev";
>   		};
>   	};
> +
> +	vcc_1v8: regulator-1v8-vcc {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc_1v8";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		vin-supply = <&vcc_3v3>;
> +	};
> +
> +	vcc_3v3: regulator-3v3-vcc {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc_3v3";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		vin-supply = <&vcc5v0_sys>;
> +	};
> +
> +	vcc5v0_sys: regulator-5v0-vcc-sys {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc5v0_sys";
> +		regulator-always-on;
> +		regulator-boot-on;
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +	};
>   };
>   
>   &pinctrl {
> @@ -85,6 +128,11 @@
>   	};
>   };
>   
> +&saradc {
> +	vref-supply = <&vcc_1v8>;
> +	status = "okay";
> +};
> +
>   &uart0 {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&uart0m0_xfer>;