[PATCH] arm64: dts: imx943-evk: Describe the PCIe M.2 Key E connector

[Sherry Sun (OSS)]

From: Sherry Sun <sherry.sun at nxp.com>

The i.MX943-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 0 Root Port and
LPUART6 nodes through graph port/endpoint.

Since currently the M.2 driver doesn't support SD-UART interface, for the
supported SD-UART IW612 M.2 module on imx943-evk board, need to add back
the WLAN regulator and bluetooth child node.

Signed-off-by: Sherry Sun <sherry.sun at nxp.com>
---
 .../boot/dts/freescale/imx943-evk-sdwifi.dtso      | 25 ++++++++++
 arch/arm64/boot/dts/freescale/imx943-evk.dts       | 55 ++++++++++++++++------
 2 files changed, 66 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx943-evk-sdwifi.dtso b/arch/arm64/boot/dts/freescale/imx943-evk-sdwifi.dtso
index 59cc1c27b9b9..b95304fd60aa 100644
--- a/arch/arm64/boot/dts/freescale/imx943-evk-sdwifi.dtso
+++ b/arch/arm64/boot/dts/freescale/imx943-evk-sdwifi.dtso
@@ -6,10 +6,35 @@
 /dts-v1/;
 /plugin/;
 
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	reg_usdhc3_vmmc: regulator-usdhc3 {
+		compatible = "regulator-fixed";
+		regulator-name = "WLAN_EN";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&reg_m2_pwr>;
+		gpio = <&pcal6416_i2c3_u46 5 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+};
+
+&lpuart6 {
+	bluetooth {
+		compatible = "nxp,88w8987-bt";
+	};
+};
+
+&m2_connector {
+	status = "disabled";
+};
+
 &pcie0 {
 	status = "disabled";
 };
 
 &usdhc3 {
+	vmmc-supply = <&reg_usdhc3_vmmc>;
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts b/arch/arm64/boot/dts/freescale/imx943-evk.dts
index 64660f94f4e9..e1f6d64d3a3f 100644
--- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts
@@ -77,6 +77,37 @@ dmic: dmic {
 		#sound-dai-cells = <0>;
 	};
 
+	m2_connector: m2-connector {
+		compatible = "pcie-m2-e-connector";
+		vpcie3v3-supply = <&reg_m2_pwr>;
+		w-disable1-gpios = <&pcal6416_i2c3_u46 5 GPIO_ACTIVE_LOW>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port at 0 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <0>;
+				m2_e_pcie_ep: endpoint at 0 {
+					reg = <0>;
+					remote-endpoint = <&pcie0_port0_ep>;
+				};
+			};
+
+			port at 3 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <3>;
+				m2_e_uart_ep: endpoint at 0 {
+					reg = <0>;
+					remote-endpoint = <&lpuart6_ep>;
+				};
+			};
+		};
+	};
+
 	reg_m2_pwr: regulator-m2-pwr {
 		compatible = "regulator-fixed";
 		regulator-name = "M.2-power";
@@ -102,16 +133,6 @@ reg_slot_pwr: regulator-slot-pwr {
 		enable-active-high;
 	};
 
-	reg_m2_wlan: regulator-wlan {
-		compatible = "regulator-fixed";
-		regulator-name = "WLAN_EN";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-		vin-supply = <&reg_m2_pwr>;
-		gpio = <&pcal6416_i2c3_u46 5 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-	};
-
 	reg_usdhc2_vmmc: regulator-usdhc2 {
 		compatible = "regulator-fixed";
 		off-on-delay-us = <12000>;
@@ -694,8 +715,10 @@ &lpuart6 {
 	pinctrl-names = "default";
 	status = "okay";
 
-	bluetooth {
-		compatible = "nxp,88w8987-bt";
+	port {
+		lpuart6_ep: endpoint {
+			remote-endpoint = <&m2_e_uart_ep>;
+		};
 	};
 };
 
@@ -1175,7 +1198,12 @@ &pcie0 {
 
 &pcie0_port0 {
 	reset-gpios = <&pcal6416_i2c3_u46 3 GPIO_ACTIVE_LOW>;
-	vpcie3v3aux-supply = <&reg_m2_wlan>;
+
+	port {
+		pcie0_port0_ep: endpoint {
+			remote-endpoint = <&m2_e_pcie_ep>;
+		};
+	};
 };
 
 &pcie0_ep {
@@ -1288,7 +1316,6 @@ &usdhc3 {
 	pinctrl-1 = <&pinctrl_usdhc3>;
 	pinctrl-names = "default", "sleep";
 	bus-width = <4>;
-	vmmc-supply = <&reg_m2_wlan>;
 	mmc-pwrseq = <&usdhc3_pwrseq>;
 	keep-power-in-suspend;
 	non-removable;

---
base-commit: e6664f2b33db9b6811eb4cec109f06cb2b4f458d
change-id: 20260818-imx943_m2-6fa2615f56a2

Best regards,
-- 
Sherry Sun <sherry.sun at nxp.com>