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@xxxxxxxxx>
---
v2: No change
---
.../boot/dts/rockchip/rk3528-radxa-e20c.dts | 48 +++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
index b378774d2a4e..5346ef457c2a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3528-radxa-e20c.dts
@@ -19,6 +19,20 @@ chosen {
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 @@ led-wan {
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 @@ wan_led_g: wan-led-g {
};
};
+&saradc {
+ vref-supply = <&vcc_1v8>;
+ status = "okay";
+};
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0m0_xfer>;
--
2.48.1
