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 <jo...@kwiboo.se> Link: https://lore.kernel.org/r/20250304201642.831218-5-jo...@kwiboo.se Signed-off-by: Heiko Stuebner <he...@sntech.de> [ upstream commit: 3a2819ee9c71d1c6388e456cc4eb042914d15d7e ] (cherry picked from commit 460ef5b623e5fa69843305faf50f6b1a8e81e1cd) Signed-off-by: Jonas Karlman <jo...@kwiboo.se> --- .../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>; -- 2.49.0
