950-0405-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch

From ade82688b687b3340ca5e7883646ad51291d49cd Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 30 Jul 2019 12:37:02 +0100
Subject: [PATCH] ARM: dts: Declare RPi 4B SD card power regulator

Later revisions of the Raspberry Pi 4B have a separate control over the
SD card power. Expose that control to Linux as a fixed regulator with
a GPIO enable.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 11 +++++++++++
 3 files changed, 13 insertions(+), 2 deletions(-)

--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
@@ -122,6 +122,16 @@
 		states = <1800000 0x1
 			  3300000 0x0>;
 	};
+
+	sd_vcc_reg: sd_vcc_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc-sd";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		enable-active-high;
+		gpio = <&expgpio 6 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 &sdhost {
@@ -132,6 +142,7 @@
 	status = "okay";
 	broken-cd;
 	vqmmc-supply = <&sd_io_1v8_reg>;
+	vmmc-supply = <&sd_vcc_reg>;
 };
 
 &genet {