[PATCH v4 4/4] arm64: dts: qcom: purwa-iot-evk: Describe the PCIe M.2 Key E connector

The Purwa IoT EVK has a PCIe M.2 Mechanical Key E connector for wireless
connectivity cards exposing Wi-Fi over PCIe and Bluetooth over UART.
Purwa inherits hamoa.dtsi via purwa.dtsi and therefore reuses the PCIe
root port compatible and the uart14_ep / pcie4_port0_ep endpoint stub
labels added there.

Describe the connector node with:
- port@0: PCIe for Wi-Fi, linked to pcie4_port0
- port@3: UART for Bluetooth, linked to uart14

This allows the pwrseq-pcie-m2 driver to manage card power and
dynamically create the UART serdev for UART BT variants of the M.2
card.

Remove the chip-specific wcn7850-pmu node, the static bluetooth
serdev under uart14, and the wifi@0 PCI child node, as the M.2
connector approach replaces WCN7850-specific power sequencing with
a chip-agnostic model.

Also remove the now-unused vreg_wcn_0p95 and vreg_wcn_1p9 dummy
fixed regulators whose only consumers were the wcn7850-pmu node.

Signed-off-by: Wei Deng <[email protected]>
---
 arch/arm64/boot/dts/qcom/purwa-iot-evk.dts | 129 +++++++----------------------
 1 file changed, 31 insertions(+), 98 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts b/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
index ad503beec1d3..6fc6fe7c0899 100644
--- a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
@@ -471,32 +471,6 @@ vph_pwr: regulator-vph-pwr {
 		regulator-boot-on;
 	};
 
-	/*
-	 * TODO: These two regulators are actually part of the removable M.2
-	 * card and not the EVK mainboard. Need to describe this differently.
-	 * Functionally it works correctly, because all we need to do is to
-	 * turn on the actual 3.3V supply above.
-	 */
-	vreg_wcn_0p95: regulator-wcn-0p95 {
-		compatible = "regulator-fixed";
-
-		regulator-name = "VREG_WCN_0P95";
-		regulator-min-microvolt = <950000>;
-		regulator-max-microvolt = <950000>;
-
-		vin-supply = <&vreg_wcn_3p3>;
-	};
-
-	vreg_wcn_1p9: regulator-wcn-1p9 {
-		compatible = "regulator-fixed";
-
-		regulator-name = "VREG_WCN_1P9";
-		regulator-min-microvolt = <1900000>;
-		regulator-max-microvolt = <1900000>;
-
-		vin-supply = <&vreg_wcn_3p3>;
-	};
-
 	vreg_wcn_3p3: regulator-wcn-3p3 {
 		compatible = "regulator-fixed";
 
@@ -618,61 +592,40 @@ platform {
 		};
 	};
 
-	wcn7850-pmu {
-		compatible = "qcom,wcn7850-pmu";
-
-		vdd-supply = <&vreg_wcn_0p95>;
-		vddio-supply = <&vreg_l15b_1p8>;
-		vddaon-supply = <&vreg_wcn_0p95>;
-		vdddig-supply = <&vreg_wcn_0p95>;
-		vddrfa1p2-supply = <&vreg_wcn_1p9>;
-		vddrfa1p8-supply = <&vreg_wcn_1p9>;
+	wifi-bt-connector {
+		compatible = "pcie-m2-e-connector";
+		vpcie3v3-supply = <&vreg_wcn_3p3>;
 
-		bt-enable-gpios = <&tlmm 116 GPIO_ACTIVE_HIGH>;
-		wlan-enable-gpios = <&tlmm 117 GPIO_ACTIVE_HIGH>;
+		w-disable1-gpios = <&tlmm 117 GPIO_ACTIVE_LOW>;
+		w-disable2-gpios = <&tlmm 116 GPIO_ACTIVE_LOW>;
 
-		pinctrl-0 = <&wcn_bt_en>, <&wcn_wlan_en>;
+		pinctrl-0 = <&wcn_wlan_en>, <&wcn_bt_en>;
 		pinctrl-names = "default";
 
-		regulators {
-			vreg_pmu_rfa_cmn: ldo0 {
-				regulator-name = "vreg_pmu_rfa_cmn";
-			};
-
-			vreg_pmu_aon_0p59: ldo1 {
-				regulator-name = "vreg_pmu_aon_0p59";
-			};
-
-			vreg_pmu_wlcx_0p8: ldo2 {
-				regulator-name = "vreg_pmu_wlcx_0p8";
-			};
-
-			vreg_pmu_wlmx_0p85: ldo3 {
-				regulator-name = "vreg_pmu_wlmx_0p85";
-			};
-
-			vreg_pmu_btcmx_0p85: ldo4 {
-				regulator-name = "vreg_pmu_btcmx_0p85";
-			};
-
-			vreg_pmu_rfa_0p8: ldo5 {
-				regulator-name = "vreg_pmu_rfa_0p8";
-			};
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
 
-			vreg_pmu_rfa_1p2: ldo6 {
-				regulator-name = "vreg_pmu_rfa_1p2";
-			};
+			port@0 {
+				reg = <0>;
+				#address-cells = <1>;
+				#size-cells = <0>;
 
-			vreg_pmu_rfa_1p8: ldo7 {
-				regulator-name = "vreg_pmu_rfa_1p8";
+				m2_e_pcie_ep: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&pcie4_port0_ep>;
+				};
 			};
 
-			vreg_pmu_pcie_0p9: ldo8 {
-				regulator-name = "vreg_pmu_pcie_0p9";
-			};
+			port@3 {
+				reg = <3>;
+				#address-cells = <1>;
+				#size-cells = <0>;
 
-			vreg_pmu_pcie_1p8: ldo9 {
-				regulator-name = "vreg_pmu_pcie_1p8";
+				m2_e_uart_ep: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&uart14_ep>;
+				};
 			};
 		};
 	};
@@ -1012,21 +965,10 @@ &pcie3_port0 {
 &pcie4_port0 {
 	reset-gpios = <&tlmm 146 GPIO_ACTIVE_LOW>;
 	wake-gpios = <&tlmm 148 GPIO_ACTIVE_LOW>;
+};
 
-	wifi@0 {
-		compatible = "pci17cb,1107";
-		reg = <0x10000 0x0 0x0 0x0 0x0>;
-
-		vddaon-supply = <&vreg_pmu_aon_0p59>;
-		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
-		vddwlmx-supply = <&vreg_pmu_wlmx_0p85>;
-		vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
-		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
-		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
-		vddrfa1p8-supply = <&vreg_pmu_rfa_1p8>;
-		vddpcie0p9-supply = <&vreg_pmu_pcie_0p9>;
-		vddpcie1p8-supply = <&vreg_pmu_pcie_1p8>;
-	};
+&pcie4_port0_ep {
+	remote-endpoint = <&m2_e_pcie_ep>;
 };
 
 &pcie5 {
@@ -1499,19 +1441,10 @@ wcn_usb_sw_n: wcn-usb-sw-n-state {
 
 &uart14 {
 	status = "okay";
+};
 
-	bluetooth {
-		compatible = "qcom,wcn7850-bt";
-		max-speed = <3200000>;
-
-		vddaon-supply = <&vreg_pmu_aon_0p59>;
-		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
-		vddwlmx-supply = <&vreg_pmu_wlmx_0p85>;
-		vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
-		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
-		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
-		vddrfa1p8-supply = <&vreg_pmu_rfa_1p8>;
-	};
+&uart14_ep {
+	remote-endpoint = <&m2_e_uart_ep>;
 };
 
 &uart21 {

-- 
2.34.1