From: Ryan Wanner <Ryan.Wanner@microchip.com>

The SDMMC in this IP currently only supports legacy mode
due to a hardware quirk, setting the flags to reflect the limitation.

Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
---
 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";
-- 
2.43.0

On 19/08/2025 at 19:05, Ryan.Wanner@microchip.com wrote:
> From: Ryan Wanner <Ryan.Wanner@microchip.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@microchip.com>

That's fair enough for the time being:
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.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";