linux-kernel - [PATCH 3/3] ARM: dts: axp209: Add iio-hwmon node for internal temperature

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Message-ID: <a40b6d46209f9b5626cd5a147c31daf5d19c9439.1681580558.git.noodles@earth.li>
Date:   Sat, 15 Apr 2023 18:47:05 +0100
From:   Jonathan McDowell <noodles@...th.li>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] ARM: dts: axp209: Add iio-hwmon node for internal
 temperature

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@...th.li>
---
 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..f00b5a7ec106 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
  */
 
+/ {
+	axp20x_temp {
+		compatible = "iio-hwmon";
+		io-channels = <&axp_adc 4>; /* Internal temperature */
+	};
+};
+
 &axp209 {
 	compatible = "x-powers,axp209";
 	interrupt-controller;
-- 
2.39.2