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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 {
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