Re: [PATCH v3 7/7] riscv: dts: spacemit: k1-bananapi-f3: add SD card support with UHS modes

[Aurelien Jarno <aurelien@aurel32.net>]

Hi,

On 2026-03-16 15:03, 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@gmail.com>
> Signed-off-by: Iker Pedrosa <ikerpedrosam@gmail.com>
> ---
>  arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 23 +++++++++++++++++++++--
>  1 file changed, 21 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 404b69c47b91f8c37d74a3031dbad0d94a28d1b4..a7d480d01ccc0439dbf456ed5a81f467af68056a 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> @@ -222,7 +222,7 @@ buck3_1v8: buck3 {
>  				regulator-always-on;
>  			};
>  
> -			buck4 {
> +			buck4: buck4 {
>  				regulator-min-microvolt = <500000>;
>  				regulator-max-microvolt = <3300000>;
>  				regulator-ramp-delay = <5000>;
> @@ -243,7 +243,7 @@ buck6 {
>  				regulator-always-on;
>  			};
>  
> -			aldo1 {
> +			aldo1: aldo1 {
>  				regulator-min-microvolt = <500000>;
>  				regulator-max-microvolt = <3400000>;
>  				regulator-boot-on;
> @@ -369,3 +369,22 @@ hub_3_0: hub@2 {
>  		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
>  	};
>  };
> +
> +&sdhci0 {
> +	pinctrl-names = "default", "state_uhs";
> +	pinctrl-0 = <&mmc1_cfg>;
> +	pinctrl-1 = <&mmc1_uhs_cfg>;
> +	bus-width = <4>;
> +	cd-gpios = <&gpio K1_GPIO(80) GPIO_ACTIVE_HIGH>;
> +	cd-inverted;

Thanks for this driver. Unfortunately, this is not correct for the 
Banana PI F3. The OrangePi RV2 buffers the signal from the SD card 
connector through a transistor, inverting the signal. On the Banana PI 
F3, the signal goes directly to the GPIO, and does not even have a 
pull-up.

With the following change, I have been able to get the patchset working 
as expected:

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index a7d480d01ccc0..72b0f75f936aa 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -375,8 +375,7 @@ &sdhci0 {
 	pinctrl-0 = <&mmc1_cfg>;
 	pinctrl-1 = <&mmc1_uhs_cfg>;
 	bus-width = <4>;
-	cd-gpios = <&gpio K1_GPIO(80) GPIO_ACTIVE_HIGH>;
-	cd-inverted;
+	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@aurel32.net                     http://aurel32.net