riscv: dts: spacemit: k1-orangepi-rv2: add SD card support with UHS modes

Add complete SD card controller support with UHS high-speed modes.

- Enable sdhci0 controller with 4-bit bus width
- Configure card detect GPIO with GPIO_ACTIVE_LOW logic
- 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
- Add stable MMC device aliases (mmc0 = eMMC, mmc1 = SD card)

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>
Link: https://patch.msgid.link/20260515-orangepi-sd-card-uhs-v10-2-094af27e310d@gmail.com
Signed-off-by: Yixun Lan <dlan@kernel.org>

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
index c95ca38e3d4a1e92f51989065f59b801bb1db996..bd40bc9011e298fcba5f66de1625c75d7fa659c6 100644 (file)
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -17,6 +17,8 @@
                serial0 = &uart0;
                ethernet0 = &eth0;
                ethernet1 = &eth1;
+               mmc0 = &emmc;
+               mmc1 = &sdhci0;
        };
 
        chosen {
@@ -202,7 +204,7 @@
                                regulator-always-on;
                        };
 
-                       aldo1 {
+                       aldo1: aldo1 {
                                regulator-min-microvolt = <500000>;
                                regulator-max-microvolt = <3400000>;
                                regulator-boot-on;
@@ -319,3 +321,21 @@
                vdd-supply = <&vcc_5v0>;
        };
 };
+
+&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_LOW>;
+       no-mmc;
+       no-sdio;
+       disable-wp;
+       cap-sd-highspeed;
+       vmmc-supply = <&buck4_3v3>;
+       vqmmc-supply = <&aldo1>;
+       sd-uhs-sdr25;
+       sd-uhs-sdr50;
+       sd-uhs-sdr104;
+       status = "okay";
+};