linux-kernel - Re: [PATCH v2 2/8] ARM: dts: microchip: sam9x60ek: Add power-supply properties for sdmmc nodes

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Date: Tue, 6 Feb 2024 07:54:48 +0200
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Mihai Sain <mihai.sain@...rochip.com>, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/8] ARM: dts: microchip: sam9x60ek: Add power-supply
 properties for sdmmc nodes

Hi, Mihai,

On 05.02.2024 10:00, Mihai Sain wrote:
> The sdmmc0 and sdmmc1 controllers are powered from 3.3V regulator.
> Add vmmc-supply and vqmmc-supply properties to sdmmc nodes.
> The sdmmc controller from SAM9X60 MPU doesn't support the IO voltage signaling/switching required by the UHS sd-card.

Please wrap the line at 75 chars (see [1]).

Thank you,
Claudiu Beznea

[1]
https://www.kernel.org/doc/html/v4.17/process/submitting-patches.html#the-canonical-patch-format.

> In order to use the sd high-speed mode, keep vqmmc at 3V3.
> 
> Signed-off-by: Mihai Sain <mihai.sain@...rochip.com>
> ---
>  arch/arm/boot/dts/microchip/at91-sam9x60ek.dts | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/microchip/at91-sam9x60ek.dts b/arch/arm/boot/dts/microchip/at91-sam9x60ek.dts
> index f3cbb675cea4..b19a0956dc97 100644
> --- a/arch/arm/boot/dts/microchip/at91-sam9x60ek.dts
> +++ b/arch/arm/boot/dts/microchip/at91-sam9x60ek.dts
> @@ -560,6 +560,8 @@ &sdmmc0 {
>  	status = "okay";
>  	cd-gpios = <&pioA 23 GPIO_ACTIVE_LOW>;
>  	disable-wp;
> +	vmmc-supply = <&vdd1_3v3>;
> +	vqmmc-supply = <&vdd1_3v3>;
>  };
>  
>  &sdmmc1 {
> @@ -568,6 +570,8 @@ &sdmmc1 {
>  	pinctrl-0 = <&pinctrl_sdmmc1_default>;
>  	no-1-8-v;
>  	non-removable;
> +	vmmc-supply = <&vdd1_3v3>;
> +	vqmmc-supply = <&vdd1_3v3>;
>  	status = "disabled"; /* Conflict with flx4. */
>  };
>