linux-kernel - [PATCH] arm64: dts: mediatek: add mmc2 support for mt8365-evk

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Message-Id: <20250109-mmc2-support-v1-1-9b9d1b1ae35d@baylibre.com>
Date: Fri, 10 Jan 2025 12:10:46 +0100
From: Alexandre Mergnat <amergnat@...libre.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 macpaul.Lin@...iatek.com
Cc: vsatoes@...libre.com, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, 
 Alexandre Mergnat <amergnat@...libre.com>
Subject: [PATCH] arm64: dts: mediatek: add mmc2 support for mt8365-evk

Adds support for the MMC2 interface on the MT8365 EVK board.
It introduces a fixed regulator for the MMC2 VDD33 supply and configures
the MMC2 node with a 4-bit bus width, high-speed capabilities, UHS
modes, and appropriate power supplies. Enabled SDIO IRQ, wakeup source,
and kept power during suspend for wireless chip functionality.

Signed-off-by: Alexandre Mergnat <amergnat@...libre.com>
---
 arch/arm64/boot/dts/mediatek/mt8365-evk.dts | 85 +++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8365-evk.dts b/arch/arm64/boot/dts/mediatek/mt8365-evk.dts
index 7d90112a7e27..309dc76322d4 100644
--- a/arch/arm64/boot/dts/mediatek/mt8365-evk.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8365-evk.dts
@@ -53,6 +53,15 @@ memory@...00000 {
 		reg = <0 0x40000000 0 0xc0000000>;
 	};
 
+	mmc2_vdd33: mmc2_vdd33-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "mmc2_vdd33";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&pio 121 0>;
+		enable-active-high;
+	};
+
 	usb_otg_vbus: regulator-0 {
 		compatible = "regulator-fixed";
 		regulator-name = "otg_vbus";
@@ -197,6 +206,28 @@ &mmc1 {
 	status = "okay";
 };
 
+&mmc2 {
+	assigned-clock-parents = <&topckgen CLK_TOP_MSDCPLL>;
+	assigned-clocks = <&topckgen CLK_TOP_MSDC50_2_SEL>;
+	bus-width = <4>;
+	cap-sd-highspeed;
+	cap-sdio-irq;
+	hs400-ds-delay = <0x12012>;
+	keep-power-in-suspend;
+	max-frequency = <200000000>;
+	non-removable;
+	pinctrl-0 = <&mmc2_default_pins>;
+	pinctrl-1 = <&mmc2_uhs_pins>;
+	pinctrl-names = "default", "state_uhs";
+	sd-uhs-sdr104;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	vmmc-supply = <&mmc2_vdd33>;
+	vqmmc-supply = <&mt6357_vcn18_reg>;
+	wakeup-source;
+	status = "okay";
+};
+
 &mt6357_pmic {
 	interrupts-extended = <&pio 145 IRQ_TYPE_LEVEL_HIGH>;
 	interrupt-controller;
@@ -410,6 +441,60 @@ cmd-dat-pins {
 		};
 	};
 
+	mmc2_default_pins: mmc2-default-pins {
+		clk-pins {
+			pinmux = <MT8365_PIN_81_MSDC2_CLK__FUNC_MSDC2_CLK>;
+			drive-strength = <4>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_10>;
+		};
+
+		cmd-dat-pins {
+			pinmux = <MT8365_PIN_82_MSDC2_DAT0__FUNC_MSDC2_DAT0>,
+				 <MT8365_PIN_83_MSDC2_DAT1__FUNC_MSDC2_DAT1>,
+				 <MT8365_PIN_84_MSDC2_DAT2__FUNC_MSDC2_DAT2>,
+				 <MT8365_PIN_85_MSDC2_DAT3__FUNC_MSDC2_DAT3>,
+				 <MT8365_PIN_80_MSDC2_CMD__FUNC_MSDC2_CMD>;
+			input-enable;
+			drive-strength = <4>;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_01>;
+		};
+
+		sys-en-pins {
+			pinmux = <MT8365_PIN_120_DMIC1_CLK__FUNC_GPIO120>;
+			output-low;
+		};
+	};
+
+	mmc2_uhs_pins: mmc2-uhs-pins {
+		clk-pins {
+			pinmux = <MT8365_PIN_81_MSDC2_CLK__FUNC_MSDC2_CLK>;
+			drive-strength = <8>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_10>;
+		};
+
+		cmd-dat-pins {
+			pinmux = <MT8365_PIN_82_MSDC2_DAT0__FUNC_MSDC2_DAT0>,
+				 <MT8365_PIN_83_MSDC2_DAT1__FUNC_MSDC2_DAT1>,
+				 <MT8365_PIN_84_MSDC2_DAT2__FUNC_MSDC2_DAT2>,
+				 <MT8365_PIN_85_MSDC2_DAT3__FUNC_MSDC2_DAT3>,
+				 <MT8365_PIN_80_MSDC2_CMD__FUNC_MSDC2_CMD>;
+			input-enable;
+			drive-strength = <8>;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_01>;
+		};
+
+		ds-pins {
+			pinmux = <MT8365_PIN_86_MSDC2_DSL__FUNC_MSDC2_DSL>;
+			drive-strength = <8>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_10>;
+		};
+
+		sys-en-pins {
+			pinmux = <MT8365_PIN_120_DMIC1_CLK__FUNC_GPIO120>;
+			output-high;
+		};
+	};
+
 	uart0_pins: uart0-pins {
 		pins {
 			pinmux = <MT8365_PIN_35_URXD0__FUNC_URXD0>,

---
base-commit: 9d89551994a430b50c4fffcb1e617a057fa76e20
change-id: 20250109-mmc2-support-96b3ea516186

Best regards,
-- 
Alexandre Mergnat <amergnat@...libre.com>