[PATCH v8 8/9] riscv: dts: spacemit: k1-bananapi-f3: add SD card support with UHS modes

[Aurelien Jarno]

Hi,

On 2026-04-13 10:02, Iker Pedrosa wrote:
> Add complete SD card controller support with UHS high-speed modes.
> 
> - Enable sdhci0 controller with 4-bit bus width
> - Configure card detect GPIO with inversion
> - Connect vmmc-supply to buck4 for 3.3V card power
> - Connect vqmmc-supply to aldo1 for 1.8V/3.3V I/O switching
> - Add dual pinctrl states for voltage-dependent pin configuration
> - Support UHS-I SDR25, SDR50, and SDR104 modes
> 
> This enables full SD card functionality including high-speed UHS modes
> for improved performance.
> 
> Suggested-by: Anand Moon <linux.amoon at gmail.com>
> Tested-by: Anand Moon <linux.amoon at gmail.com>
> Signed-off-by: Iker Pedrosa <ikerpedrosam at gmail.com>
> ---
>  arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 24 ++++++++++++++++++++++--
>  1 file changed, 22 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> index 5790d927b93d..a7d88564630f 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> @@ -220,7 +220,7 @@ buck3_1v8: buck3 {
>  				regulator-always-on;
>  			};
>  
> -			buck4 {
> +			buck4: buck4 {
>  				regulator-min-microvolt = <500000>;
>  				regulator-max-microvolt = <3300000>;
>  				regulator-ramp-delay = <5000>;
> @@ -241,7 +241,7 @@ buck6 {
>  				regulator-always-on;
>  			};
>  
> -			aldo1 {
> +			aldo1: aldo1 {
>  				regulator-min-microvolt = <500000>;
>  				regulator-max-microvolt = <3400000>;
>  				regulator-boot-on;
> @@ -367,3 +367,23 @@ hub_3_0: hub at 2 {
>  		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
>  	};
>  };
> +
> +&sdhci0 {
> +	pinctrl-names = "default", "uhs";
> +	pinctrl-0 = <&mmc1_cfg>;
> +	pinctrl-1 = <&mmc1_uhs_cfg>;
> +	bus-width = <4>;
> +	cd-gpios = <&gpio K1_GPIO(80) GPIO_ACTIVE_HIGH>;
> +	cd-inverted;
> +	broken-cd;

Card detect is marked as broken as a proper definition requires pull-up 
support in pinctrl. Support for that went into 7.1, so I guess it's not 
safe to use the proper definition. That means using the following 
changes on to of this patch:

--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -406,9 +406,7 @@ &sdhci0 {
 	pinctrl-0 = <&mmc1_cfg>;
 	pinctrl-1 = <&mmc1_uhs_cfg>;
 	bus-width = <4>;
-	cd-gpios = <&gpio K1_GPIO(80) GPIO_ACTIVE_HIGH>;
-	cd-inverted;
-	broken-cd;
+	cd-gpios = <&gpio K1_GPIO(80) (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
 	no-mmc;
 	no-sdio;
 	disable-wp;

Regards
Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien at aurel32.net                     http://aurel32.net