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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0420-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0420-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch41
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0420-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch b/target/linux/bcm27xx/patches-5.4/950-0420-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch
new file mode 100644
index 0000000000..a69feb50b4
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0420-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch
@@ -0,0 +1,41 @@
+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 {