linux-kernel - [PATCH v3 4/5] arm64: tegra: Add vmmc-supply regulator for Jetson AGX Xavier SDMMC1

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Date:   Wed, 14 Oct 2020 19:56:26 +0200
From:   Tamás Szűcs <tszucs@...tonmail.ch>
To:     Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        JC Kuo <jckuo@...dia.com>, Vidya Sagar <vidyas@...dia.com>,
        Sameer Pujar <spujar@...dia.com>, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Tamás Szűcs <tszucs@...tonmail.ch>
Subject: [PATCH v3 4/5] arm64: tegra: Add vmmc-supply regulator for Jetson AGX Xavier SDMMC1

Create regulator for VDD_3V3_SD and add it to SDMMC1. When vmmc-supply is
undefined the initialization sequence specified in aliases is disregarded.

Signed-off-by: Tamás Szűcs <tszucs@...tonmail.ch>
---
 arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi b/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi
index 31b5f00a7547..604a2c8a7478 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi
@@ -78,6 +78,8 @@
 			bus-width = <4>;
 			cd-gpios = <&gpio TEGRA194_MAIN_GPIO(G, 7) GPIO_ACTIVE_LOW>;
 			disable-wp;
+
+			vmmc-supply = <&vdd_3v3_sd>;
 		};
 
 		/* SDMMC4 (eMMC) */
@@ -356,4 +358,14 @@
 		gpio = <&gpio TEGRA194_MAIN_GPIO(Z, 1) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
+
+	vdd_3v3_sd: regulator@5 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_3V3_SD";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio TEGRA194_MAIN_GPIO(A, 0) GPIO_ACTIVE_HIGH>;
+		regulator-boot-on;
+		enable-active-high;
+	};
 };
-- 
2.20.1