arm64: dts: qcom: gaokun3: Add Embedded Controller node

The Embedded Controller in the Huawei Matebook E Go is accessible on &i2c15
and provides battery and adapter status, port orientation status, as well
as HPD event notifications for two USB Type-C port, etc.

Add the EC to the device tree and describe the relationship among
the type-c connectors, role switches, orientation switches and the QMP
combo PHY.

Signed-off-by: Pengyu Luo <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Konrad Dybcio <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Ilpo Järvinen <[email protected]>
Signed-off-by: Ilpo Järvinen <[email protected]>

Author: right-0903

arch/arm64/boot/dts/qcom/sc8280xp-huawei-gaokun3.dts

@@ -28,6 +28,7 @@
 
 	aliases {
 		i2c4 = &i2c4;
+		i2c15 = &i2c15;
 		serial1 = &uart2;
 	};
 
@@ -216,6 +217,40 @@
 		};
 	};
 
+	usb0-sbu-mux {
+		compatible = "pericom,pi3usb102", "gpio-sbu-mux";
+
+		select-gpios = <&tlmm 164 GPIO_ACTIVE_HIGH>;
+
+		pinctrl-0 = <&usb0_sbu_default>;
+		pinctrl-names = "default";
+
+		orientation-switch;
+
+		port {
+			usb0_sbu_mux: endpoint {
+				remote-endpoint = <&ucsi0_sbu>;
+			};
+		};
+	};
+
+	usb1-sbu-mux {
+		compatible = "pericom,pi3usb102", "gpio-sbu-mux";
+
+		select-gpios = <&tlmm 47 GPIO_ACTIVE_HIGH>;
+
+		pinctrl-0 = <&usb1_sbu_default>;
+		pinctrl-names = "default";
+
+		orientation-switch;
+
+		port {
+			usb1_sbu_mux: endpoint {
+				remote-endpoint = <&ucsi1_sbu>;
+			};
+		};
+	};
+
 	wcn6855-pmu {
 		compatible = "qcom,wcn6855-pmu";
 
@@ -584,6 +619,97 @@
 
 };
 
+&i2c15 {
+	clock-frequency = <400000>;
+
+	pinctrl-0 = <&i2c15_default>;
+	pinctrl-names = "default";
+
+	status = "okay";
+
+	embedded-controller@38 {
+		compatible = "huawei,gaokun3-ec";
+		reg = <0x38>;
+
+		interrupts-extended = <&tlmm 107 IRQ_TYPE_LEVEL_LOW>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		connector@0 {
+			compatible = "usb-c-connector";
+			reg = <0>;
+			power-role = "dual";
+			data-role = "dual";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					ucsi0_hs_in: endpoint {
+						remote-endpoint = <&usb_0_dwc3_hs>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+
+					ucsi0_ss_in: endpoint {
+						remote-endpoint = <&usb_0_qmpphy_out>;
+					};
+				};
+
+				port@2 {
+					reg = <2>;
+
+					ucsi0_sbu: endpoint {
+						remote-endpoint = <&usb0_sbu_mux>;
+					};
+				};
+			};
+		};
+
+		connector@1 {
+			compatible = "usb-c-connector";
+			reg = <1>;
+			power-role = "dual";
+			data-role = "dual";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					ucsi1_hs_in: endpoint {
+						remote-endpoint = <&usb_1_dwc3_hs>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+
+					ucsi1_ss_in: endpoint {
+						remote-endpoint = <&usb_1_qmpphy_out>;
+					};
+				};
+
+				port@2 {
+					reg = <2>;
+
+					ucsi1_sbu: endpoint {
+						remote-endpoint = <&usb1_sbu_mux>;
+					};
+				};
+			};
+		};
+	};
+};
+
 &mdss0 {
 	status = "okay";
 };
@@ -1004,6 +1130,10 @@
 	dr_mode = "host";
 };
 
+&usb_0_dwc3_hs {
+	remote-endpoint = <&ucsi0_hs_in>;
+};
+
 &usb_0_hsphy {
 	vdda-pll-supply = <&vreg_l9d>;
 	vdda18-supply = <&vreg_l1c>;
@@ -1025,6 +1155,10 @@
 	remote-endpoint = <&mdss0_dp0_out>;
 };
 
+&usb_0_qmpphy_out {
+	remote-endpoint = <&ucsi0_ss_in>;
+};
+
 &usb_1 {
 	status = "okay";
 };
@@ -1033,6 +1167,10 @@
 	dr_mode = "host";
 };
 
+&usb_1_dwc3_hs {
+	remote-endpoint = <&ucsi1_hs_in>;
+};
+
 &usb_1_hsphy {
 	vdda-pll-supply = <&vreg_l4b>;
 	vdda18-supply = <&vreg_l1c>;
@@ -1054,6 +1192,10 @@
 	remote-endpoint = <&mdss0_dp1_out>;
 };
 
+&usb_1_qmpphy_out {
+	remote-endpoint = <&ucsi1_ss_in>;
+};
+
 &usb_2 {
 	status = "okay";
 };
@@ -1177,6 +1319,13 @@
 		bias-disable;
 	};
 
+	i2c15_default: i2c15-default-state {
+		pins = "gpio36", "gpio37";
+		function = "qup15";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
 	mode_pin_active: mode-pin-state {
 		pins = "gpio26";
 		function = "gpio";
@@ -1301,6 +1450,20 @@
 		};
 	};
 
+	usb0_sbu_default: usb0-sbu-state {
+		pins = "gpio164";
+		function = "gpio";
+		drive-strength = <16>;
+		bias-disable;
+	};
+
+	usb1_sbu_default: usb1-sbu-state {
+		pins = "gpio47";
+		function = "gpio";
+		drive-strength = <16>;
+		bias-disable;
+	};
+
 	wcd_default: wcd-default-state {
 		reset-pins {
 			pins = "gpio106";