The SD card power can be controlled trough a pin routed into the board's
external GPIO expander. Turn that into a regulator and provide it to
emmc2.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
---
arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
index b0ea8233b636..a2da058396fe 100644
--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
@@ -55,6 +55,16 @@ sd_io_1v8_reg: sd_io_1v8_reg {
3300000 0x0>;
status = "okay";
};
+
+ 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>;
+ };
};
&firmware {
@@ -173,6 +183,7 @@ brcmf: wifi@1 {
/* EMMC2 is used to drive the SD card */
&emmc2 {
vqmmc-supply = <&sd_io_1v8_reg>;
+ vmmc-supply = <&sd_vcc_reg>;
broken-cd;
status = "okay";
};
--
2.25.1
