[PATCH 3/3] riscv: dts: spacemit: k3-deepcomputing-fml13v05: Enable SD card support

[Sandie Cao]

Hi, Troy:

> From: "Troy Mitchell"<troy.mitchell at linux.spacemit.com>
> Date:  Wed, Sep 23, 2026, 10:23
> On Tue, Sep 22, 2026 at 07:04:50PM +0800, Sandie Cao wrote:
> > @@ -184,6 +185,24 @@ &combophy {
> > [...]
> > +&sdhci0 {
> > +        pinctrl-names = "default","uhs";
> > +        pinctrl-0 = <&mmc1_cfg>;
> > +        pinctrl-1 = <&mmc1_uhs_cfg>;
> > +        bus-width = <4>;
> > +        cd-gpios = <&gpio K3_GPIO(88) GPIO_ACTIVE_LOW>;
> 
> Does GPIO88 have an external pull-up? The SDK DTS [1] also includes
> mmc1_cd_cfg in both pinctrl states, with a pull-up and 3.3 V configuration.
> Neither mmc1_cfg nor mmc1_uhs_cfg covers this pin. Is that configuration
> unnecessary on this board?
> 

FML13V05 SD card slot is inside the board, it doesn't need cd-gpio, FML13V05 Keeps GPIO88 to low, Then SD card is always on for SD Card driver.

We check the vmmc-supply is p3v3. We have the same SDK DTS config with k3_com260[1] , so, this patch follows the SD card patch of k3_com260 dts[2].
 
If this is not correct, we will change it.

Link: https://github.com/spacemit-com/linux-6.18/blob/k3-br-v1.0.y/arch/riscv/boot/dts/spacemit/k3_com260.dtsi [1]
https://lore.kernel.org/all/20260610-07-k3-enable-sd-v1-1-196ae29bd091@kernel.org/ [2]

Best regards
Sandie

> > +        no-mmc;
> > +        no-sdio;
> > +        disable-wp;
> > +        cap-sd-highspeed;
> > +        vmmc-supply = <&aldo4>;
> > +        vqmmc-supply = <&aldo1>;
> 
> Could you confirm which rail supplies the card's VDD? The SDK DTS [1]
> uses p3v3 for vmmc rather than aldo4. Does that RPMI regulator map to
> ALDO4, or is the card powered by a different rail?
> 
> Link: https://github.com/spacemit-com/linux-6.18/blob/k3-br-v1.0.y/arch/riscv/boot/dts/spacemit/k3-deepcomputing-fml13v05.dts [1]
> 
> -- 
> Troy Mitchell
>