[PATCH v3 5/5] ARM: dts: axp209: Add iio-hwmon node for internal temperature

[Jonathan McDowell <noodles@xxxxxxxx>]

This adds a DT node to hook up the internal temperature ADC to the
iio-hwmon driver. The various voltage + current ADCs are consumed and
exposed by their respective drivers, but this is not and is always
available. Naming chosen to match the axp20x_ prefix the power sensors
use.

Signed-off-by: Jonathan McDowell <noodles@xxxxxxxx>
Reviewed-by: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
---
 arch/arm/boot/dts/axp209.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/axp209.dtsi b/arch/arm/boot/dts/axp209.dtsi
index ca240cd6f6c3..469d0f7d5185 100644
--- a/arch/arm/boot/dts/axp209.dtsi
+++ b/arch/arm/boot/dts/axp209.dtsi
@@ -48,6 +48,13 @@
  * http://dl.linux-sunxi.org/AXP/AXP209%20Datasheet%20v1.0_cn.pdf
  */
 
+/ {
+	pmic-temp {
+		compatible = "iio-hwmon";
+		io-channels = <&axp_adc 4>; /* Internal temperature */
+	};
+};
+
 &axp209 {
 	compatible = "x-powers,axp209";
 	interrupt-controller;
-- 
2.39.2