linux-kernel - [PATCH 2/3] ARM: dts: meson8b: ec100: enable the SDHC controller

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Message-Id: <20200620163654.37207-3-martin.blumenstingl@googlemail.com>
Date:   Sat, 20 Jun 2020 18:36:53 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-amlogic@...ts.infradead.org, khilman@...libre.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 2/3] ARM: dts: meson8b: ec100: enable the SDHC controller

EC-100 has built-in eMMC flash which is hard-wired to 3.3V VCC (which
means it's limited to high-speed MMC modes). Enable the SDHC controller
to access the contents of the eMMC flash.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 arch/arm/boot/dts/meson8b-ec100.dts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/meson8b-ec100.dts b/arch/arm/boot/dts/meson8b-ec100.dts
index 163a200d5a7b..ed06102a4014 100644
--- a/arch/arm/boot/dts/meson8b-ec100.dts
+++ b/arch/arm/boot/dts/meson8b-ec100.dts
@@ -27,6 +27,11 @@ memory {
 		reg = <0x40000000 0x40000000>;
 	};
 
+	emmc_pwrseq: emmc-pwrseq {
+		compatible = "mmc-pwrseq-emmc";
+		reset-gpios = <&gpio BOOT_9 GPIO_ACTIVE_LOW>;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys-polled";
 		#address-cells = <1>;
@@ -299,6 +304,26 @@ &saradc {
 	vref-supply = <&vcc_1v8>;
 };
 
+&sdhc {
+	status = "okay";
+
+	pinctrl-0 = <&sdxc_c_pins>;
+	pinctrl-names = "default";
+
+	bus-width = <8>;
+	max-frequency = <50000000>;
+
+	cap-mmc-highspeed;
+	disable-wp;
+	non-removable;
+	no-sdio;
+
+	mmc-pwrseq = <&emmc_pwrseq>;
+
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vcc_3v3>;
+};
+
 &sdio {
 	status = "okay";
 
-- 
2.27.0