Hi Nicolas,
Am 06.03.20 um 18:44 schrieb Nicolas Saenz Julienne:
> 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";
i think we need to enable CONFIG_REGULATOR_FIXED_VOLTAGE in
bcm2835_defconfig
Best regards
Stefan
> + 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";
> };
