From: Chen-Yu Tsai <wenst@chromium.org>
Date: Mon, 2 Mar 2026 05:31:06 +0000 (+0800)
Subject: arm64: dts: mediatek: mt8195-cherry: add WiFi PCIe and BT USB power supplies
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c5d91b3d0eeed3925dd43f834afcc19a11aa9fd;p=thirdparty%2Fkernel%2Flinux.git

arm64: dts: mediatek: mt8195-cherry: add WiFi PCIe and BT USB power supplies

The MT8195 Cherry design features an M.2 E-key slot wired up with PCIe
and USB for a WiFi+BT adapter. Previously the power was just enabled
all the time with a default pinctrl setting that set the GPIO pin high.

With the PCIe slot description DT binding in place, the power supplies
can at least be added and tied to the PCIe and USB hosts. Once the
M.2 E-key binding is merged, this description can be further converted
to an M.2 E-key.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index 6e99122c65ac0..f1ff64a84267c 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -83,6 +83,17 @@
 		vin-supply = <&pp3300_z2>;
 	};
 
+	pp3300_wlan: regulator-pp3300-wlan {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pp3300_wlan_en_pin>;
+		regulator-name = "pp3300_wlan";
+		/* load switch */
+		enable-active-high;
+		gpio = <&pio 58 GPIO_ACTIVE_HIGH>;
+		vin-supply = <&pp3300_z2>;
+	};
+
 	/* system wide 3.3V power rail */
 	pp3300_z2: regulator-pp3300-z2 {
 		compatible = "regulator-fixed";
@@ -760,10 +771,25 @@
 };
 
 &pcie1 {
-	status = "okay";
-
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie1_pins_default>;
+	status = "okay";
+
+	pcie@0 {
+		compatible = "pciclass,0604";
+		reg = <0 0 0 0 0>;
+		device_type = "pci";
+		num-lanes = <1>;
+		vpcie3v3-supply = <&pp3300_wlan>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		ranges;
+
+		wifi@0 {
+			reg = <0 0 0 0 0>;
+			wakeup-source;
+		};
+	};
 };
 
 &pio {
@@ -1179,12 +1205,6 @@
 	};
 
 	pio_default: pio-default-pins {
-		pins-wifi-enable {
-			pinmux = <PINMUX_GPIO58__FUNC_GPIO58>;
-			output-high;
-			drive-strength = <14>;
-		};
-
 		pins-low-power-pd {
 			pinmux = <PINMUX_GPIO25__FUNC_GPIO25>,
 				 <PINMUX_GPIO26__FUNC_GPIO26>,
@@ -1222,6 +1242,12 @@
 		};
 	};
 
+	pp3300_wlan_en_pin: pp3300-wlan-en-pins {
+		pins-en {
+			pinmux = <PINMUX_GPIO58__FUNC_GPIO58>;
+		};
+	};
+
 	rt1019p_pins_default: rt1019p-default-pins {
 		pins-amp-sdb {
 			pinmux = <PINMUX_GPIO100__FUNC_GPIO100>;
@@ -1570,11 +1596,10 @@
 };
 
 &xhci3 {
-	status = "okay";
-
 	/* MT7921's USB Bluetooth has issues with USB2 LPM */
 	usb2-lpm-disable;
-	vbus-supply = <&usb_vbus>;
+	vbus-supply = <&pp3300_wlan>;
+	status = "okay";
 };
 
 #include <arm/cros-ec-keyboard.dtsi>