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 <quentin.sch...@free-electrons.com>
---

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

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