arm64: dts: rockchip: Add sdio node to rock-5b

Enable SDIO on Radxa ROCK 5 Model B M.2 Key E. Add sdio node and alias as mmc2.
Add regulator for the 3.3 V rail bringing it up during boot. Make sure EKEY_EN
is muxed as GPIO.
Signed-off-by: Tamás Szűcs <tszucs@protonmail.ch>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230924203740.65744-1-tszucs@protonmail.chSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts

@@ -12,6 +12,7 @@ / {
 	aliases {
 		mmc0 = &sdhci;
 		mmc1 = &sdmmc;
+		mmc2 = &sdio;
 		serial2 = &uart2;
 	};
 
@@ -113,6 +114,21 @@ vcc_1v1_nldo_s3: vcc-1v1-nldo-s3-regulator {
 		regulator-max-microvolt = <1100000>;
 		vin-supply = <&vcc5v0_sys>;
 	};
+
+	vcc3v3_wf: vcc3v3-wf-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc3v3_wf";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		enable-active-high;
+		gpios = <&gpio1 RK_PD2 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&vcc3v3_wf_en>;
+		startup-delay-us = <50000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
 };
 
 &combphy0_ps {
@@ -319,6 +335,12 @@ vcc5v0_host_en: vcc5v0-host-en {
 			rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	m2e {
+		vcc3v3_wf_en: vcc3v3-wf-en {
+			rockchip,pins = <1 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
 };
 
 &pwm1 {
@@ -355,6 +377,27 @@ &sdmmc {
 	status = "okay";
 };
 
+&sdio {
+	max-frequency = <200000000>;
+	no-sd;
+	no-mmc;
+	non-removable;
+	bus-width = <4>;
+	cap-sdio-irq;
+	disable-wp;
+	keep-power-in-suspend;
+	wakeup-source;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	vmmc-supply = <&vcc3v3_wf>;
+	vqmmc-supply = <&vcc_1v8_s3>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdiom0_pins>;
+	status = "okay";
+};
+
 &spi2 {
 	status = "okay";
 	assigned-clocks = <&cru CLK_SPI2>;