[PATCH 6/8] arm64: dts: imx8dxl-evk: Describe the PCIe M.2 Key E connector

[Sherry Sun (OSS)]

From: Sherry Sun <sherry.sun@xxxxxxx>

The i.MX8DXL-EVK has the PCIe M.2 Mechanical Key E connector to connect
wireless connectivity cards over PCIe and UART interfaces. Hence,
describe the connector node and link it with the PCIe b Root Port and
LPUART1 nodes through graph port/endpoint.

The M.2 Key E connector is powered by a 3.3V fixed regulator
(reg_audio_3v3), add a reg_3v3 label to avoid confusion.

Signed-off-by: Sherry Sun <sherry.sun@xxxxxxx>
---
 arch/arm64/boot/dts/freescale/imx8dxl-evk.dts | 56 ++++++++++++++-----
 1 file changed, 42 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts b/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
index 1084164d1381..6afee1f1a9fc 100644
--- a/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8dxl-evk.dts
@@ -42,6 +42,37 @@ memory@80000000 {
 		reg = <0x00000000 0x80000000 0 0x40000000>;
 	};
 
+	m2-connector {
+		compatible = "pcie-m2-e-connector";
+		vpcie3v3-supply = <&reg_3v3>;
+		w-disable1-gpios = <&pca6416_1 13 GPIO_ACTIVE_LOW>;
+
+		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 = <&pcieb_port0_ep>;
+				};
+			};
+
+			port@3 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <3>;
+				m2_e_uart_ep: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&lpuart1_ep>;
+				};
+			};
+		};
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -182,15 +213,6 @@ mii_select: regulator-4 {
 		regulator-always-on;
 	};
 
-	reg_pcieb: regulator-pcieb {
-		compatible = "regulator-fixed";
-		regulator-max-microvolt = <3300000>;
-		regulator-min-microvolt = <3300000>;
-		regulator-name = "reg_pcieb";
-		gpio = <&pca6416_1 13 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-	};
-
 	reg_audio_5v: regulator-audio-pwr {
 		compatible = "regulator-fixed";
 		regulator-name = "audio-5v";
@@ -200,7 +222,7 @@ reg_audio_5v: regulator-audio-pwr {
 		regulator-boot-on;
 	};
 
-	reg_audio_3v3: regulator-audio-3v3 {
+	reg_3v3: reg_audio_3v3: regulator-audio-3v3 {
 		compatible = "regulator-fixed";
 		regulator-name = "audio-3v3";
 		regulator-min-microvolt = <3300000>;
@@ -623,8 +645,10 @@ &lpuart1 {
 	pinctrl-0 = <&pinctrl_lpuart1>;
 	status = "okay";
 
-	bluetooth {
-		compatible = "nxp,88w8987-bt";
+	port {
+		lpuart1_ep: endpoint {
+			remote-endpoint = <&m2_e_uart_ep>;
+		};
 	};
 };
 
@@ -690,8 +714,12 @@ &pcie0_ep {
 
 &pcieb_port0 {
 	reset-gpios = <&lsio_gpio4 0 GPIO_ACTIVE_LOW>;
-	vpcie-supply = <&reg_pcieb>;
-	vpcie3v3aux-supply = <&reg_pcieb>;
+
+	port {
+		pcieb_port0_ep: endpoint {
+			remote-endpoint = <&m2_e_pcie_ep>;
+		};
+	};
 };
 
 &sai0 {
-- 
2.50.1