[PATCH v3 3/3] arm64: dts: allwinner: a523: add gpadc node

[Michal Piekos]

Describe GPADC block on Allwinner A523.

Tested on Radxa Cubie A5E:
- 2 connected channels are showing voltages in agreement with
  schematics.
        BOOT-SEL-ADC ~500mV
        BOM-ADC ~1800mV
- 3rd channel exposed on 40pin header is showing correct voltages when
  connected to known voltage source.

Signed-off-by: Michal Piekos <michal.piekos at mmpsystems.pl>
---
 arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
index 5afa8d92acbf..fdb60539aa6a 100644
--- a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
@@ -340,6 +340,19 @@ ledc: led-controller at 2008000 {
 			status = "disabled";
 		};
 
+		gpadc: adc at 2009000 {
+			compatible = "allwinner,sun55i-a523-gpadc";
+			reg = <0x2009000 0x400>;
+			clocks = <&ccu CLK_BUS_GPADC0>, <&ccu CLK_GPADC0>;
+			clock-names = "bus", "mod";
+			resets = <&ccu RST_BUS_GPADC0>;
+			interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
+			#io-channel-cells = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
 		wdt: watchdog at 2050000 {
 			compatible = "allwinner,sun55i-a523-wdt";
 			reg = <0x2050000 0x20>;

-- 
2.43.0