[PATCH 5/5] arm64: dts: qcom: gaokun3: Add Embedded Controller node

[Pengyu Luo <mitltlatltl@gmail.com>]

The Embedded Controller in the Huawei Matebook E Go (s8280xp)
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 ports, orientation switches and the QMP combo PHY.

Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
---
 .../boot/dts/qcom/sc8280xp-huawei-gaokun3.dts | 139 ++++++++++++++++++
 1 file changed, 139 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-huawei-gaokun3.dts b/arch/arm64/boot/dts/qcom/sc8280xp-huawei-gaokun3.dts
index 09b95f89e..09ca9a560 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-huawei-gaokun3.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-huawei-gaokun3.dts
@@ -28,6 +28,7 @@ / {
 
 	aliases {
 		i2c4 = &i2c4;
+		i2c15 = &i2c15;
 		serial1 = &uart2;
 	};
 
@@ -216,6 +217,40 @@ map1 {
 		};
 	};
 
+	usb0-sbu-mux {
+			compatible = "pericom,pi3usb102", "gpio-sbu-mux";
+
+			select-gpios = <&tlmm 164 GPIO_ACTIVE_HIGH>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&usb0_sbu_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-names = "default";
+			pinctrl-0 = <&usb1_sbu_default>;
+
+			orientation-switch;
+
+			port {
+				usb1_sbu_mux: endpoint {
+						remote-endpoint = <&ucsi1_sbu>;
+				};
+			};
+	};
+
 	wcn6855-pmu {
 		compatible = "qcom,wcn6855-pmu";
 
@@ -584,6 +619,81 @@ touchscreen@4f {
 
 };
 
+&i2c15 {
+	clock-frequency = <400000>;
+
+	pinctrl-0 = <&i2c15_default>;
+	pinctrl-names = "default";
+
+	status = "okay";
+
+	embedded-controller@38 {
+		compatible = "huawei,sc8280xp-gaokun-ec", "huawei,gaokun-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_ss_in: endpoint {
+						remote-endpoint = <&usb_0_qmpphy_out>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+
+					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_ss_in: endpoint {
+						remote-endpoint = <&usb_1_qmpphy_out>;
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+
+					ucsi1_sbu: endpoint {
+						remote-endpoint = <&usb1_sbu_mux>;
+					};
+				};
+			};
+		};
+	};
+};
+
 &mdss0 {
 	status = "okay";
 };
@@ -1025,6 +1135,10 @@ &usb_0_qmpphy_dp_in {
 	remote-endpoint = <&mdss0_dp0_out>;
 };
 
+&usb_0_qmpphy_out {
+	remote-endpoint = <&ucsi0_ss_in>;
+};
+
 &usb_1 {
 	status = "okay";
 };
@@ -1054,6 +1168,10 @@ &usb_1_qmpphy_dp_in {
 	remote-endpoint = <&mdss0_dp1_out>;
 };
 
+&usb_1_qmpphy_out {
+	remote-endpoint = <&ucsi1_ss_in>;
+};
+
 &usb_2 {
 	status = "okay";
 };
@@ -1177,6 +1295,13 @@ i2c4_default: i2c4-default-state {
 		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 +1426,20 @@ tx-pins {
 		};
 	};
 
+	usb0_sbu_default: usb0-sbu-state {
+		pins = "gpio164";
+		function = "gpio";
+		bias-disable;
+		drive-strength = <16>;
+	};
+
+	usb1_sbu_default: usb1-sbu-state {
+		pins = "gpio47";
+		function = "gpio";
+		bias-disable;
+		drive-strength = <16>;
+	};
+
 	wcd_default: wcd-default-state {
 		reset-pins {
 			pins = "gpio106";
-- 
2.47.1