[PATCH 6/6] arm64: dts: socfpga: agilex3: enable SD card on SoCDK

[tze . yee . ng]

From: Tze Yee Ng <tze.yee.ng@xxxxxxxxxx>

Enable the micro-SD slot on the Agilex3 SoCDK board:

  - Add the fixed 3.3V card supply and the GPIO-controlled 1.8V/3.3V
    VQMMC I/O regulator.
  - Enable the sdmmc node in 4-bit mode with SDR104 and DDR50 UHS-I
    support and wire up the vmmc/vqmmc supplies.

The board includes socfpga_agilex5.dtsi, so the DDR50 read-path tuning
defaults added there apply here as well.

Signed-off-by: Tze Yee Ng <tze.yee.ng@xxxxxxxxxx>
---
 .../boot/dts/intel/socfpga_agilex3_socdk.dts  | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts b/arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts
index b40f28519334..f46e5c070c0e 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex3_socdk.dts
@@ -45,6 +45,25 @@ memory@80000000 {
 		/* We expect the bootloader to fill in the reg */
 		reg = <0x0 0x80000000 0x0 0x0>;
 	};
+
+	vqmmc_io_reg: regulator-1p8v {
+		compatible = "regulator-gpio";
+		gpios = <&portb 3 GPIO_ACTIVE_HIGH>;
+		gpios-states = <0>;
+		regulator-max-microvolt = <3300000>;
+		regulator-min-microvolt = <1800000>;
+		regulator-name = "vqmmc-io";
+		states = <1800000 0x1>,
+			 <3300000 0x0>;
+	};
+
+	vmmc_reg: regulator-fixed-3p3v {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-max-microvolt = <3300000>;
+		regulator-min-microvolt = <3300000>;
+		regulator-name = "vcc-sd";
+	};
 };
 
 &gmac2 {
@@ -121,6 +140,20 @@ root: partition@c00000 {
 	};
 };
 
+&sdmmc {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	disable-wp;
+	max-frequency = <200000000>;
+	no-mmc;
+	sd-uhs-ddr50;
+	sd-uhs-sdr104;
+	vmmc-supply = <&vmmc_reg>;
+	vqmmc-supply = <&vqmmc_io_reg>;
+
+	status = "okay";
+};
+
 &smmu {
 	status = "okay";
 };
-- 
2.43.7