[PATCH v3 6/6] arm64: dts: qcom: gaokun3: Add Embedded Controller node

Pengyu Luo
2025-01-13T17:53:22Z

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 <mitltlatltl@gmail.com>
---
.../boot/dts/qcom/sc8280xp-huawei-gaokun3.dts | 163 ++++++++++++++++++
1 file changed, 163 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..1667c7157 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-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 @@ touchscreen@4f {

};

+&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 @@ &usb_0_dwc3 {
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 @@ &usb_0_qmpphy_dp_in {
remote-endpoint = <&mdss0_dp0_out>;
};

+&usb_0_qmpphy_out {
+ remote-endpoint = <&ucsi0_ss_in>;
+};
+
&usb_1 {
status = "okay";
};
@@ -1033,6 +1167,10 @@ &usb_1_dwc3 {
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 @@ &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 +1319,13 @@ 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 +1450,20 @@ tx-pins {
};
};

+ 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";
--
2.47.1