From: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Date: Sun, 5 Jan 2025 16:13:43 +0000 (+0200)
Subject: arm64: dts: exynos8895-dreamlte: enable support for microSD storage
X-Git-Tag: next-20250206~87^2^3~1
X-Git-Url: https://gentwo.org/gitweb/?a=commitdiff_plain;h=2e7281e60a6b592c193903034c40fc57458fe874;p=linux%2F.git

arm64: dts: exynos8895-dreamlte: enable support for microSD storage

Enable MMC for the Samsung Galaxy S8, used as external microSD card
storage. Since the main PMIC is currently not supported, assume the
required regulators are enabled by the previous bootloader.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Link: https://lore.kernel.org/r/20250105161344.420749-6-ivo.ivanov.ivanov1@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---

diff --git a/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts b/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts
index 3a376ab2bb9e..6c4f8d4a9cc4 100644
--- a/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts
+++ b/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts
@@ -16,6 +16,10 @@ / {
 	compatible = "samsung,dreamlte", "samsung,exynos8895";
 	chassis-type = "handset";
 
+	aliases {
+		mmc0 = &mmc;
+	};
+
 	chosen {
 		#address-cells = <2>;
 		#size-cells = <1>;
@@ -95,6 +99,27 @@ &oscclk {
 	clock-frequency = <26000000>;
 };
 
+&mmc {
+	pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_bus1 &sd2_bus4 &sd2_cd>;
+	pinctrl-names = "default";
+
+	bus-width = <4>;
+	card-detect-delay = <200>;
+	cd-gpios = <&gpa1 5 GPIO_ACTIVE_LOW>;
+	clock-frequency = <800000000>;
+	disable-wp;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+
+	/* TODO: Add regulators once PMIC is implemented */
+
+	samsung,dw-mshc-ciu-div = <3>;
+	samsung,dw-mshc-ddr-timing = <1 2>;
+	samsung,dw-mshc-sdr-timing = <0 3>;
+
+	status = "okay";
+};
+
 &pinctrl_alive {
 	key_power: key-power-pins {
 		samsung,pins = "gpa2-4";
@@ -123,4 +148,11 @@ key_wink: key-wink-pins {
 		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
 		samsung,pin-drv = <EXYNOS7_PIN_DRV_LV1>;
 	};
+
+	sd2_cd: sd2-cd-pins {
+		samsung,pins = "gpa1-5";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
+		samsung,pin-drv = <EXYNOS7_PIN_DRV_LV4>;
+	};
 };