linux-kernel - Re: [PATCH] ARM: dts: microchip: sama7d65: Force SDMMC Legacy mode

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Message-ID: <b7089f9a-92d9-4652-b571-b749637c609f@microchip.com>
Date: Fri, 22 Aug 2025 16:56:35 +0200
From: Nicolas Ferre <nicolas.ferre@...rochip.com>
To: <Ryan.Wanner@...rochip.com>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, Aubin Constans <Aubin.Constans@...rochip.com>
CC: <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: microchip: sama7d65: Force SDMMC Legacy mode

On 19/08/2025 at 19:05, Ryan.Wanner@...rochip.com wrote:
> From: Ryan Wanner <Ryan.Wanner@...rochip.com>
> 
> The SDMMC in this IP currently only supports legacy mode

... but we're working on it ;-)

> due to a hardware quirk, setting the flags to reflect the limitation.
> 
> Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>

That's fair enough for the time being:
Acked-by: Nicolas Ferre <nicolas.ferre@...rochip.com>

Regards,
   Nicolas

> ---
>   arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
> index 7eaf6ca233ec..d086437f5e6f 100644
> --- a/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
> +++ b/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
> @@ -387,6 +387,8 @@ &rtt {
>   
>   &sdmmc1 {
>   	bus-width = <4>;
> +	no-1-8-v;
> +	sdhci-caps-mask = <0x0 0x00200000>;
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&pinctrl_sdmmc1_default>;
>   	status = "okay";