From: Aurelien Jarno <aurelien@aurel32.net>
Date: Tue, 19 May 2026 04:12:38 +0000 (+0200)
Subject: riscv: dts: spacemit: enable SD card support on Milk-V Jupiter
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=60b5e027c8c8cab69ad9cc7cab71ee795963e7b1;p=thirdparty%2Flinux.git

riscv: dts: spacemit: enable SD card support on Milk-V Jupiter

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

- Enable sdhci0 controller with 4-bit bus width
- Configure card detect GPIO with pull-up
- 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
- Alias it as mmc1

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Yixun Lan <dlan@kernel.org>
Link: https://patch.msgid.link/20260519041458.3287843-5-aurelien@aurel32.net
Signed-off-by: Yixun Lan <dlan@kernel.org>
---

diff --git a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
index 1a833e716cb68..beebf804197e2 100644
--- a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
@@ -17,6 +17,7 @@
 		i2c2 = &i2c2;
 		i2c8 = &i2c8;
 		mmc0 = &emmc;
+		mmc1 = &sdhci0;
 		serial0 = &uart0;
 	};
 
@@ -250,7 +251,7 @@
 				regulator-always-on;
 			};
 
-			aldo1 {
+			aldo1: aldo1 {
 				regulator-min-microvolt = <500000>;
 				regulator-max-microvolt = <3400000>;
 				regulator-boot-on;
@@ -385,6 +386,24 @@
 	};
 };
 
+&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 | 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";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_2_cfg>;