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

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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>
This commit is contained in:
Trevor Gamblin 2026-05-20 15:06:23 +02:00 committed by Yixun Lan
parent 844c291973
commit 85e4c5733c
1 changed files with 21 additions and 1 deletions
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22
arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
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@ -19,6 +19,8 @@ aliases {
serial0 = &uart0;
i2c2 = &i2c2;
i2c8 = &i2c8;
mmc0 = &emmc;
mmc1 = &sdhci0;
};
chosen {
@ -218,7 +220,7 @@ buck6 {
regulator-always-on;
};
aldo1 {
aldo1: aldo1 {
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@ -384,3 +386,21 @@ hub_3_0: hub@2 {
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";
};