[PATCH V2 3/3] arm64: dts: rockchip: Add saradc node to Indiedroid Nova

[Chris Morgan]

From: Chris Morgan <macromorgan at hotmail.com>

Add ADC support for the Indiedroid Nova, as well as the two ADC buttons
found on the device. The buttons are documented as "boot" and
"recovery". The boot button is used by the bootloader to boot into USB
recovery mode. The recovery button use is currently unknown.

Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
---
 .../dts/rockchip/rk3588s-indiedroid-nova.dts  | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts b/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts
index 1e2336d3065b..60f00ceb630e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-indiedroid-nova.dts
@@ -3,6 +3,7 @@
 /dts-v1/;
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/linux-event-codes.h>
 #include <dt-bindings/pinctrl/rockchip.h>
 #include <dt-bindings/usb/pd.h>
 #include "rk3588s.dtsi"
@@ -11,6 +12,34 @@ / {
 	model = "Indiedroid Nova";
 	compatible = "indiedroid,nova", "rockchip,rk3588s";
 
+	adc-keys-0 {
+		compatible = "adc-keys";
+		io-channel-names = "buttons";
+		io-channels = <&saradc 0>;
+		keyup-threshold-microvolt = <1800000>;
+		poll-interval = <100>;
+
+		button-boot {
+			label = "boot";
+			linux,code = <KEY_PROG1>;
+			press-threshold-microvolt = <18000>;
+		};
+	};
+
+	adc-keys-1 {
+		compatible = "adc-keys";
+		io-channel-names = "buttons";
+		io-channels = <&saradc 1>;
+		keyup-threshold-microvolt = <1800000>;
+		poll-interval = <100>;
+
+		button-recovery {
+			label = "recovery";
+			linux,code = <KEY_PROG2>;
+			press-threshold-microvolt = <18000>;
+		};
+	};
+
 	aliases {
 		mmc0 = &sdhci;
 		mmc1 = &sdmmc;
@@ -410,6 +439,11 @@ typec5v_pwren: typec5v-pwren {
 	};
 };
 
+&saradc {
+	vref-supply = <&vcca_1v8_s0>;
+	status = "okay";
+};
+
 /* HS400 modes seemed to cause io errors. */
 &sdhci {
 	bus-width = <8>;
-- 
2.34.1