[PATCH v10 05/17] riscv: dts: spacemit: k1-bananapi-f3: add SD card support with UHS modes

From: Iker Pedrosa <[email protected]>

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 and 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)

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

Suggested-by: Anand Moon <[email protected]>
Tested-by: Anand Moon <[email protected]>
Tested-by: Margherita Milani <[email protected]>
Tested-by: Aurelien Jarno <[email protected]>
Reviewed-by: Aurelien Jarno <[email protected]>
Signed-off-by: Iker Pedrosa <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Yixun Lan <[email protected]>

[ upstream commit: c76e2f058cbcab84e4a703f26857a58bdf6a0042 ]

(cherry picked from commit 3efd965004f1604c204001dcead9a44f729d5d58)
---
 dts/upstream/src/riscv/spacemit/k1-bananapi-f3.dts | 24 ++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/dts/upstream/src/riscv/spacemit/k1-bananapi-f3.dts b/dts/upstream/src/riscv/spacemit/k1-bananapi-f3.dts
index 9429189354d6..9beb8947f12c 100644
--- a/dts/upstream/src/riscv/spacemit/k1-bananapi-f3.dts
+++ b/dts/upstream/src/riscv/spacemit/k1-bananapi-f3.dts
@@ -17,6 +17,8 @@
 		spi3 = &spi3;
 		i2c2 = &i2c2;
 		i2c8 = &i2c8;
+		mmc0 = &emmc;
+		mmc1 = &sdhci0;
 	};
 
 	chosen {
@@ -221,7 +223,7 @@
 				regulator-always-on;
 			};
 
-			buck4 {
+			buck4: buck4 {
 				regulator-min-microvolt = <500000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-ramp-delay = <5000>;
@@ -242,7 +244,7 @@
 				regulator-always-on;
 			};
 
-			aldo1 {
+			aldo1: aldo1 {
 				regulator-min-microvolt = <500000>;
 				regulator-max-microvolt = <3400000>;
 				regulator-boot-on;
@@ -374,3 +376,21 @@
 		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
 	};
 };
+
+&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>;
+	vqmmc-supply = <&aldo1>;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	status = "okay";
+};

-- 
2.51.0