linux-kernel - Re: [PATCH v2 11/11] ARM: dts: bcm2711: Add vmmc regulator in emmc2

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Message-ID: <3bd022a6-922f-c20a-8d07-383817549960@i2se.com>
Date:   Mon, 9 Mar 2020 21:00:00 +0100
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        adrian.hunter@...el.com, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>
Cc:     phil@...pberrypi.com, linux-mmc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, f.fainelli@...il.com,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 11/11] ARM: dts: bcm2711: Add vmmc regulator in emmc2

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@...e.de>
> ---
>  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";
>  };