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From:   Amit Singh Tomar <amittomer25@gmail.com>
To:     andre.przywara@arm.com, afaerber@suse.de,
        manivannan.sadhasivam@linaro.org, robh+dt@kernel.org
Cc:     cristian.ciocaltea@gmail.com, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-actions@lists.infradead.org, devicetree@vger.kernel.org
Subject: [PATCH v3 10/10] arm64: dts: actions: Add uSD support for Cubieboard7
Date:   Tue,  2 Jun 2020 23:03:12 +0530
Message-Id: <1591119192-18538-11-git-send-email-amittomer25@gmail.com>
In-Reply-To: <1591119192-18538-1-git-send-email-amittomer25@gmail.com>
References: <1591119192-18538-1-git-send-email-amittomer25@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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>
---
Changes since v2:
	* No change.
Changes since v1:
        * No change.
Changes since RFC:
        * No change.
---
 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 b1a34f95d44c..2bb29bc683ef 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>
 #include <dt-bindings/power/owl-s700-powergate.h>
-- 
2.7.4