[PATCH RFC 8/8] arm64: dts: actions: Add uSD support for Cubieboard7

[Amit Singh Tomar <amittomer25@gmail.com>]

This commit adds uSD support for Cubieboard7 board based on Actions Semi
S700 SoC. SD0 is connected to uSD slot. Since there is no PMIC support
added yet, fixed regulator has been used as a regulator node.

Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com>
---
 arch/arm64/boot/dts/actions/s700-cubieboard7.dts | 41 ++++++++++++++++++++++++
 arch/arm64/boot/dts/actions/s700.dtsi            |  1 +
 2 files changed, 42 insertions(+)

diff --git a/arch/arm64/boot/dts/actions/s700-cubieboard7.dts b/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
index 63e375cd9eb4..ec117eb12f3a 100644
--- a/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
+++ b/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
@@ -13,6 +13,7 @@
 
 	aliases {
 		serial3 = &uart3;
+		mmc0 = &mmc0;
 	};
 
 	chosen {
@@ -28,6 +29,23 @@
 		device_type = "memory";
 		reg = <0x1 0xe0000000 0x0 0x0>;
 	};
+
+	/* Fixed regulator used in the absence of PMIC */
+	vcc_3v1: vcc-3v1 {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.1V";
+		regulator-min-microvolt = <3100000>;
+		regulator-max-microvolt = <3100000>;
+	};
+
+	/* Fixed regulator used in the absence of PMIC */
+	sd_vcc: sd-vcc {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.1V";
+		regulator-min-microvolt = <3100000>;
+		regulator-max-microvolt = <3100000>;
+		regulator-always-on;
+	};
 };
 
 &i2c0 {
@@ -81,6 +99,14 @@
 			bias-pull-up;
 		};
 	};
+
+	mmc0_default: mmc0_default {
+		pinmux {
+			groups = "sd0_d0_mfp", "sd0_d1_mfp", "sd0_d2_d3_mfp",
+				 "sd0_cmd_mfp", "sd0_clk_mfp";
+			function = "sd0";
+		};
+	};
 };
 
 &timer {
@@ -90,3 +116,18 @@
 &uart3 {
 	status = "okay";
 };
+
+/* uSD */
+&mmc0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_default>;
+	cd-gpios = <&pinctrl 120 GPIO_ACTIVE_LOW>;
+	no-sdio;
+	no-mmc;
+	no-1-8-v;
+	bus-width = <4>;
+	vmmc-supply = <&sd_vcc>;
+	vqmmc-supply = <&sd_vcc>;
+};
+
diff --git a/arch/arm64/boot/dts/actions/s700.dtsi b/arch/arm64/boot/dts/actions/s700.dtsi
index 3f1fc3e48415..8a541dd48f61 100644
--- a/arch/arm64/boot/dts/actions/s700.dtsi
+++ b/arch/arm64/boot/dts/actions/s700.dtsi
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/clock/actions,s700-cmu.h>
+#include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/reset/actions,s700-reset.h>
 
-- 
2.7.4