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From:   Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
To:     Rob Herring <robh+dt@kernel.org>,
        =?UTF-8?q?Andreas=20F=C3=A4rber?= <afaerber@suse.de>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc:     devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-actions@lists.infradead.org
Subject: [PATCH 09/10] arm: dts: owl-s500-roseapplepi: Add uSD support
Date:   Fri, 26 Jun 2020 02:34:21 +0300
Message-Id: <521e5024f355c006d7abc8fe30d5cae63a9601f1.1593124368.git.cristian.ciocaltea@gmail.com>
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References: <cover.1593124368.git.cristian.ciocaltea@gmail.com>
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Add uSD support for RoseapplePi SBC using a fixed regulator as a
temporary solution until PMIC support becomes available.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
---
 arch/arm/boot/dts/owl-s500-roseapplepi.dts | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm/boot/dts/owl-s500-roseapplepi.dts b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
index 800edf5d2d12..0a916b6c83a8 100644
--- a/arch/arm/boot/dts/owl-s500-roseapplepi.dts
+++ b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
@@ -14,6 +14,7 @@ / {
 	model = "Roseapple Pi";
 
 	aliases {
+		mmc0 = &mmc0;
 		serial2 = &uart2;
 	};
 
@@ -25,6 +26,55 @@ memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x80000000>; /* 2GB */
 	};
+
+	/* 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;
+	};
+};
+
+&pinctrl {
+	mmc0_default: mmc0_default {
+		pinmux {
+			groups = "sd0_d0_mfp", "sd0_d1_mfp", "sd0_d2_d3_mfp",
+				 "sd0_cmd_mfp", "sd0_clk_mfp";
+			function = "sd0";
+		};
+
+		drv_pinconf {
+			groups = "sd0_d0_d3_drv", "sd0_cmd_drv", "sd0_clk_drv";
+			drive-strength = <8>;
+		};
+
+		bias0_pinconf {
+			pins = "sd0_d0", "sd0_d1", "sd0_d2",
+			       "sd0_d3", "sd0_cmd";
+			bias-pull-up;
+		};
+
+		bias1_pinconf {
+			pins = "sd0_clk";
+			bias-pull-down;
+		};
+	};
+};
+
+/* uSD */
+&mmc0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_default>;
+	no-sdio;
+	no-mmc;
+	no-1-8-v;
+	cd-gpios = <&pinctrl 117 GPIO_ACTIVE_LOW>;
+	bus-width = <4>;
+	vmmc-supply = <&sd_vcc>;
+	vqmmc-supply = <&sd_vcc>;
 };
 
 &twd_timer {
-- 
2.27.0