X-Powers AXP22X PMIC has multiple ADCs, each one exposing data from the
different power supplies connected to the PMIC.

This adds the ADC subnode for AXP22X PMIC.

Signed-off-by: Quentin Schulz <redacted>
---

v2:
 - removed #io-channels property (the IIO channels mapping is done by
 using iio_map structure in the ADC driver),

 arch/arm/boot/dts/axp22x.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/axp22x.dtsi b/arch/arm/boot/dts/axp22x.dtsi
index 458b668..abeec81 100644
--- a/arch/arm/boot/dts/axp22x.dtsi
+++ b/arch/arm/boot/dts/axp22x.dtsi

@@ -52,6 +52,10 @@
 	interrupt-controller;
 	#interrupt-cells = <1>;
 
+	axp221_adc: adc {
+		compatible = "x-powers,axp221-adc";
+	};
+
 	regulators {
 		/* Default work frequency for buck regulators */
 		x-powers,dcdc-freq = <3000>;

-- 
2.9.3