linux-kernel - [PATCH v1 3/5] arm64: dts: imx8-apalis: specify adc reference voltage regulator

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Message-ID: <20251027093133.2344267-4-max.oss.09@gmail.com>
Date: Mon, 27 Oct 2025 10:30:09 +0100
From: max.oss.09@...il.com
To: Max Krummenacher <max.krummenacher@...adex.com>,
	Stefan Eichenberger <stefan.eichenberger@...adex.com>
Cc: Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 3/5] arm64: dts: imx8-apalis: specify adc reference voltage regulator

From: Max Krummenacher <max.krummenacher@...adex.com>

This sets in_voltage_scale to calculate the measured voltage from the
raw digital value of the ADC.

Signed-off-by: Max Krummenacher <max.krummenacher@...adex.com>
---

 arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
index 686fce7443bb..abf6d543380c 100644
--- a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
@@ -284,11 +284,13 @@ &asrc0 {
 &adc0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_adc0>;
+	vref-supply = <&reg_vref_1v8>;
 };
 
 &adc1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_adc1>;
+	vref-supply = <&reg_vref_1v8>;
 };
 
 &cpu_alert0 {
-- 
2.42.0