From de242bf1972967d773484bf5ea2ee3c5f96c07d5 Mon Sep 17 00:00:00 2001
From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Date: Mon, 23 Feb 2026 21:51:07 +0530
Subject: [PATCH] arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s: Describe
 PCIe M.2 1620 LGA connector

Lenovo Thinkpad T14s is found to have a soldered down version of M.2 1620
LGA connector. Though, there is no 1620 LGA form factor defined in the M.2
spec, it looks very similar to the M.2 Key M connector by supporting both
WiFi and BT interfaces.

Hence, add the M.2 1620 LGA connector node with fallback to Key E.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
---
 .../qcom/x1e78100-lenovo-thinkpad-t14s.dtsi   | 93 ++++++++++++++++++-
 1 file changed, 92 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
index 1605a79374cd..f8916b62c359 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
@@ -21,6 +21,10 @@
 	compatible = "lenovo,thinkpad-t14s", "qcom,x1e78100", "qcom,x1e80100";
 	chassis-type = "laptop";
 
+	aliases {
+		serial0 = &uart14;
+	};
+
 	wcd938x: audio-codec {
 		compatible = "qcom,wcd9385-codec";
 
@@ -361,6 +365,22 @@
 		regulator-boot-on;
 	};
 
+	vreg_wcn_3p3: regulator-wcn-3p3 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "VREG_WCN_3P3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&tlmm 214 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&wcn_sw_en>;
+		pinctrl-names = "default";
+
+		regulator-boot-on;
+	};
+
 	vreg_wwan: regulator-wwan {
 		compatible = "regulator-fixed";
 
@@ -504,7 +524,7 @@
 		};
 	};
 
-	connector {
+	connector-0 {
 		compatible = "pcie-m2-m-connector";
 		vpcie3v3-supply = <&vreg_nvme>;
 
@@ -525,6 +545,45 @@
 			};
 		};
 	};
+
+	connector-1 {
+		compatible = "pcie-m2-1620-lga-connector", "pcie-m2-e-connector";
+		vpcie3v3-supply = <&vreg_wcn_3p3>;
+		vpcie1v8-supply = <&vreg_l15b_1p8>;
+		w-disable1-gpios = <&tlmm 117 GPIO_ACTIVE_LOW>;
+		w-disable2-gpios = <&tlmm 116 GPIO_ACTIVE_LOW>;
+		pinctrl-0 = <&wcn_wlan_bt_en>;
+		pinctrl-names = "default";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				reg = <0>;
+
+				m2_e_pcie_ep: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&pcie4_port0_ep>;
+				};
+			};
+
+			port@3 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				reg = <3>;
+
+				m2_e_uart_ep: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&uart14_ep>;
+				};
+			};
+		};
+	};
 };
 
 &apps_rsc {
@@ -1338,8 +1397,16 @@
 };
 
 &pcie4_port0 {
+	compatible = "pciclass,0604";
+
 	reset-gpios = <&tlmm 146 GPIO_ACTIVE_LOW>;
 	wake-gpios = <&tlmm 148 GPIO_ACTIVE_LOW>;
+
+	port {
+		pcie4_port0_ep: endpoint {
+			remote-endpoint = <&m2_e_pcie_ep>;
+		};
+	};
 };
 
 &pcie5 {
@@ -1769,6 +1836,20 @@
 		output-low;
 	};
 
+	wcn_sw_en: wcn-sw-en-state {
+		pins = "gpio214";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
+	wcn_wlan_bt_en: wcn-wlan-en-state {
+		pins = "gpio117", "gpio116";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	wwan_sw_en: wwan-sw-en-state {
 		pins = "gpio221";
 		function = "gpio";
@@ -1777,6 +1858,16 @@
 	};
 };
 
+&uart14 {
+	status = "okay";
+
+	port {
+		uart14_ep: endpoint {
+			remote-endpoint = <&m2_e_uart_ep>;
+		};
+	};
+};
+
 &usb_1_ss0_hsphy {
 	vdd-supply = <&vreg_l3j_0p8>;
 	vdda12-supply = <&vreg_l2j_1p2>;