From 2e7281e60a6b592c193903034c40fc57458fe874 Mon Sep 17 00:00:00 2001
From: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Date: Sun, 5 Jan 2025 18:13:43 +0200
Subject: [PATCH] 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>
---
 .../boot/dts/exynos/exynos8895-dreamlte.dts   | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

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 @@
 	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 @@
 		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>;
+	};
 };
-- 
2.51.0