linux-kernel - [PATCH v1] arm64: dts: imx8mp-verdin: Label ldo5 and link to usdhc2

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Date: Tue,  9 Jan 2024 13:16:27 +0100
From: Philippe Schenker <dev@...henker.ch>
To: devicetree@...r.kernel.org,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>
Cc: Francesco Dolcini <francesco@...cini.it>,
	Philippe Schenker <philippe.schenker@...ulsing.ch>,
	Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	NXP Linux Team <linux-imx@....com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh+dt@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] arm64: dts: imx8mp-verdin: Label ldo5 and link to usdhc2

From: Philippe Schenker <philippe.schenker@...ulsing.ch>

This commit labels LDO5 as `reg_vdd_sdio` in `imx8mp-verdin.dtsi` to
facilitate changing its voltage to 1.8V, necessary for an SDIO
peripheral that requires 1.8V at default and high-speed modes.

Additionally, it links `reg_vdd_sdio` to `&usdhc2`, aligning with the
hardware configuration specified in the datasheet.

Signed-off-by: Philippe Schenker <philippe.schenker@...ulsing.ch>

---

 arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
index 04f2083c4ab2..837db8961ba7 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
@@ -535,7 +535,7 @@ LDO4 {
 				regulator-name = "On-module +V3.3_ADC (LDO4)";
 			};
 
-			LDO5 {
+			reg_vdd_sdio: LDO5 {
 				regulator-max-microvolt = <3300000>;
 				regulator-min-microvolt = <1800000>;
 				regulator-name = "On-module +V3.3_1.8_SD (LDO5)";
@@ -873,6 +873,7 @@ &usdhc2 {
 	pinctrl-2 = <&pinctrl_usdhc2_200mhz>, <&pinctrl_usdhc2_cd>;
 	pinctrl-3 = <&pinctrl_usdhc2_sleep>, <&pinctrl_usdhc2_cd_sleep>;
 	vmmc-supply = <&reg_usdhc2_vmmc>;
+	vqmmc-supply = <&reg_vdd_sdio>;
 };
 
 /* On-module eMMC */
-- 
2.34.1