[PATCH 10/10] riscv: dts: spacemit: k1-orangepi-rv2: add SD card support with UHS modes

[Iker Pedrosa]

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
- Add AIB register properties for hardware voltage switching
- Support UHS-I SDR25, SDR50, and SDR104 modes

This enables full SD card functionality including high-speed UHS modes
for improved performance.

Signed-off-by: Iker Pedrosa <ikerpedrosam at gmail.com>
---
 arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
index 414b03f5e6480f05f5d7eeaaa0afb4e86425ae36..f22f7427b3370a6b6c1cd8360b33efc2a285f8d0 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -140,3 +140,24 @@ sd_vqmmc: aldo1 {
 		};
 	};
 };
+
+&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;
+	no-sdio;
+	disable-wp;
+	cap-sd-highspeed;
+	vmmc-supply = <&sd_vmmc>;
+	vqmmc-supply = <&sd_vqmmc>;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	spacemit,aib-mmc1-io-reg = <0xD401E81C>;
+	spacemit,apbc-asfar-reg = <0xD4015050>;
+	spacemit,apbc-assar-reg = <0xD4015054>;
+	status = "okay";
+};

-- 
2.53.0