ARM: dts: meson8b-odroidc1: add microSD support

The Odroid C1 features a microSD slot. This patch adds the necessary
DT bindings to support it.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm/boot/dts/meson8b-odroidc1.dts

@@ -54,6 +54,7 @@ / {
 
 	aliases {
 		serial0 = &uart_AO;
+		mmc0 = &sd_card_slot;
 	};
 
 	memory {
@@ -69,6 +70,37 @@ blue {
 			default-state = "off";
 		};
 	};
+
+	tflash_vdd: regulator-tflash_vdd {
+		/*
+		 * signal name from schematics: TFLASH_VDD_EN
+		 */
+		compatible = "regulator-fixed";
+
+		regulator-name = "TFLASH_VDD";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&gpio GPIOY_12 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	tf_io: gpio-regulator-tf_io {
+		compatible = "regulator-gpio";
+
+		regulator-name = "TF_IO";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+
+		/*
+		 * signal name from schematics: TF_3V3N_1V8_EN
+		 */
+		gpios = <&gpio_ao GPIOAO_3 GPIO_ACTIVE_HIGH>;
+		gpios-states = <0>;
+
+		states = <3300000 0
+			  1800000 1>;
+	};
 };
 
 &uart_AO {
@@ -100,6 +132,32 @@ &usb1 {
 	status = "okay";
 };
 
+&sdio {
+	status = "okay";
+
+	pinctrl-0 = <&sd_b_pins>;
+	pinctrl-names = "default";
+
+	/* SD card */
+	sd_card_slot: slot@1 {
+		compatible = "mmc-slot";
+		reg = <1>;
+		status = "okay";
+
+		bus-width = <4>;
+		no-sdio;
+		cap-mmc-highspeed;
+		cap-sd-highspeed;
+		disable-wp;
+
+		cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_HIGH>;
+		cd-inverted;
+
+		vmmc-supply = <&tflash_vdd>;
+		vqmmc-supply = <&tf_io>;
+	};
+};
+
 &ethmac {
 	status = "okay";
 

arch/arm/boot/dts/meson8b.dtsi

@@ -206,6 +206,14 @@ mux {
 				function = "ethernet";
 			};
 		};
+
+		sd_b_pins: sd-b {
+			mux {
+				groups = "sd_d0_b", "sd_d1_b", "sd_d2_b",
+					"sd_d3_b", "sd_clk_b", "sd_cmd_b";
+				function = "sd_b";
+			};
+		};
 	};
 };