riscv: dts: spacemit: k1-musepi-pro: add SD card support with UHS modes

Update the Muse Pi Pro devicetree with SD card support to match what
was done for the OrangePi RV2 in [1]. More precisely:

- Enable sdhci0 controller with 4-bit bus width
- Configure card detect GPIO with internal pull-up support
- 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)

[1] https://lore.kernel.org/linux-riscv/20260316-orangepi-sd-card-uhs-v3-0-aefd3b7832df@gmail.com/T/#

Tested-by: Andre Heider <a.heider@gmail.com>
Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Signed-off-by: Iker Pedrosa <ikerpedrosam@gmail.com>
Signed-off-by: Andre Heider <a.heider@gmail.com>
Link: https://lore.kernel.org/linux-riscv/20260316-orangepi-sd-card-uhs-v3-0-aefd3b7832df@gmail.com/T/#
Link: https://patch.msgid.link/20260520130624.1763487-1-a.heider@gmail.com
Signed-off-by: Yixun Lan <dlan@kernel.org>

diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 4aef287353cab6b3cd6898328e70d36403a4c9dd..0d809e4ad3b1f711c3f3a4c497215e9547984b2e 100644 (file)
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -19,6 +19,8 @@
                serial0 = &uart0;
                i2c2 = &i2c2;
                i2c8 = &i2c8;
+               mmc0 = &emmc;
+               mmc1 = &sdhci0;
        };
 
        chosen {
@@ -218,7 +220,7 @@
                                regulator-always-on;
                        };
 
-                       aldo1 {
+                       aldo1: aldo1 {
                                regulator-min-microvolt = <500000>;
                                regulator-max-microvolt = <3400000>;
                                regulator-boot-on;
@@ -384,3 +386,21 @@
                reset-gpios = <&gpio K1_GPIO(123) GPIO_ACTIVE_LOW>; /* HUB_RST */
        };
 };
+
+&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 | GPIO_PULL_UP)>;
+       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";
+};