[PATCH v7 7/9] riscv: dts: spacemit: k1-orangepi-rv2: add SD card support with UHS modes

Iker Pedrosa
2026-04-13T07:26:45Z

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.

Tested-by: Anand Moon <linux.amoon@gmail.com>
Tested-by: Trevor Gamblin <tgamblin@baylibre.com>
Tested-by: Michael Opdenacker <michael.opdenacker@rootcommit.com>
Tested-by: Vincent Legoll <legoll@online.fr>
Signed-off-by: Iker Pedrosa <ikerpedrosam@gmail.com>
---
arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
index 9c417a483f6b..95cfb4681ced 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -140,3 +140,22 @@ aldo1: aldo1 {
};
};
};
+
+&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;
+ no-mmc;
+ no-sdio;
+ disable-wp;
+ cap-sd-highspeed;
+ vmmc-supply = <&buck4>;
+ vqmmc-supply = <&aldo1>;
+ sd-uhs-sdr25;
+ sd-uhs-sdr50;
+ sd-uhs-sdr104;
+ status = "okay";
+};

--
2.53.0