linux-kernel - [PATCH v1 05/10] arm64: dts: imx8mm-verdin: comment about i2c level shifter

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Message-Id: <20220324155649.285924-6-marcel@ziswiler.com>
Date:   Thu, 24 Mar 2022 16:56:44 +0100
From:   Marcel Ziswiler <marcel@...wiler.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Andrejs Cainikovs <andrejs.cainikovs@...adex.com>,
        Arnd Bergmann <arnd@...db.de>,
        Fabio Estevam <festevam@...il.com>,
        Frank Rowand <frowand.list@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        NXP Linux Team <linux-imx@....com>,
        Olof Johansson <olof@...om.net>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 05/10] arm64: dts: imx8mm-verdin: comment about i2c level shifter

From: Marcel Ziswiler <marcel.ziswiler@...adex.com>

Add a note about the bootloader being expected to switch on the I2C
level shifter for the TLA2024 ADC behind this PMIC.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@...adex.com>
---

 arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
index 599b620ae04d..4542c99ce906 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
@@ -337,6 +337,11 @@ pca9450: pmic@25 {
 		reg = <0x25>;
 		sd-vsel-gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
 
+		/*
+		 * The bootloader is expected to switch on the I2C level shifter for the TLA2024 ADC
+		 * behind this PMIC.
+		 */
+
 		regulators {
 			reg_vdd_soc: BUCK1 {
 				nxp,dvs-run-voltage = <850000>;
-- 
2.34.1