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* [PATCH v2] arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer
@ 2026-08-03 13:27 Xin Liu
  2026-08-03 19:35 ` Dmitry Baryshkov
  0 siblings, 1 reply; 3+ messages in thread
From: Xin Liu @ 2026-08-03 13:27 UTC (permalink / raw)
  To: Bjorn Andersson, Konrad Dybcio, Rob Herring, Krzysztof Kozlowski,
	Conor Dooley
  Cc: linux-arm-msm, devicetree, linux-kernel, xin.liu, tingwei.zhang,
	jie.gan, Guodong Xu

The Hamoa IoT EVK hardware design uses a Parade PS8830 retimer on
I2C3 for USB Type-C port 0. Describe the retimer and route typec0
through it to enable USB 3.0 SuperSpeed and DisplayPort Alt Mode.

Supply the PS8830 from the existing vreg_rtmr0_* rails and remove
their stale "Left unused" annotation.

The FSUSB42 SBU mux chip is present on the PCB but with all signal
lines unconnected (NC), so remove the fsusb42 node and its pinctrl
group.

Tested on the Hamoa IoT EVK:

USB 3.0 SuperSpeed at 5 Gbps on typec0
DisplayPort Alt Mode on typec0

Signed-off-by: Guodong Xu <guodong.xu@oss.qualcomm.com>
Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
---
Changes in v2:
 - Clarify that FSUSB42 is present on PCB but with all signal lines
   unconnected (NC), rather than "won't be populated"
 - Add test results (USB 3.0 SuperSpeed and DisplayPort Alt Mode on typec0)

Link: https://lore.kernel.org/all/20260721074145.1534100-1-xin.liu@oss.qualcomm.com/

 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 108 ++++++++++++---------
 1 file changed, 60 insertions(+), 48 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
index 9fa86bb6438e..a3ca22f9c3e8 100644
--- a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
@@ -126,15 +126,15 @@ port@1 {
 					reg = <1>;
 
 					pmic_glink_ss0_ss_in: endpoint {
-						remote-endpoint = <&usb_1_ss0_qmpphy_out>;
+						remote-endpoint = <&retimer_ss0_ss_out>;
 					};
 				};
 
 				port@2 {
 					reg = <2>;
 
-					pmic_glink_ss0_sbu: endpoint {
-						remote-endpoint = <&usb_1_ss0_sbu_mux>;
+					pmic_glink_ss0_con_sbu_in: endpoint {
+						remote-endpoint = <&retimer_ss0_con_sbu_out>;
 					};
 				};
 			};
@@ -303,7 +303,6 @@ vreg_pcie_3v3_aux: regulator-pcie-3v3-aux {
 		pinctrl-names = "default";
 	};
 
-	/* Left unused as the retimer is not used on this board. */
 	vreg_rtmr0_1p15: regulator-rtmr0-1p15 {
 		compatible = "regulator-fixed";
 
@@ -658,25 +657,6 @@ platform {
 		};
 	};
 
-	usb-1-ss0-sbu-mux {
-		compatible = "onnn,fsusb42", "gpio-sbu-mux";
-
-		enable-gpios = <&tlmm 168 GPIO_ACTIVE_LOW>;
-		select-gpios = <&tlmm 167 GPIO_ACTIVE_HIGH>;
-
-		pinctrl-0 = <&usb_1_ss0_sbu_default>;
-		pinctrl-names = "default";
-
-		mode-switch;
-		orientation-switch;
-
-		port {
-			usb_1_ss0_sbu_mux: endpoint {
-				remote-endpoint = <&pmic_glink_ss0_sbu>;
-			};
-		};
-	};
-
 	wcn7850-pmu {
 		compatible = "qcom,wcn7850-pmu";
 
@@ -793,6 +773,62 @@ retimer_ss2_con_sbu_out: endpoint {
 	};
 };
 
+&i2c3 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	typec-mux@8 {
+		compatible = "parade,ps8830";
+		reg = <0x08>;
+
+		clocks = <&rpmhcc RPMH_RF_CLK4>;
+
+		vdd-supply = <&vreg_rtmr0_1p15>;
+		vdd33-supply = <&vreg_rtmr0_3p3>;
+		vdd33-cap-supply = <&vreg_rtmr0_3p3>;
+		vddar-supply = <&vreg_rtmr0_1p15>;
+		vddat-supply = <&vreg_rtmr0_1p15>;
+		vddio-supply = <&vreg_rtmr0_1p8>;
+
+		reset-gpios = <&pm8550_gpios 10 GPIO_ACTIVE_LOW>;
+
+		pinctrl-0 = <&rtmr0_default>;
+		pinctrl-names = "default";
+
+		orientation-switch;
+		retimer-switch;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				retimer_ss0_ss_out: endpoint {
+					remote-endpoint = <&pmic_glink_ss0_ss_in>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				retimer_ss0_ss_in: endpoint {
+					remote-endpoint = <&usb_1_ss0_qmpphy_out>;
+				};
+			};
+
+			port@2 {
+				reg = <2>;
+
+				retimer_ss0_con_sbu_out: endpoint {
+					remote-endpoint = <&pmic_glink_ss0_con_sbu_in>;
+				};
+			};
+		};
+	};
+};
+
 &i2c5 {
 	clock-frequency = <400000>;
 
@@ -1458,30 +1494,6 @@ usb2_pwr_3p3_reg_en: usb2-pwr-3p3-reg-en-state {
 		bias-disable;
 	};
 
-	usb_1_ss0_sbu_default: usb-1-ss0-sbu-state {
-		mode-pins {
-			pins = "gpio166";
-			function = "gpio";
-			bias-disable;
-			drive-strength = <2>;
-			output-high;
-		};
-
-		oe-n-pins {
-			pins = "gpio168";
-			function = "gpio";
-			bias-disable;
-			drive-strength = <2>;
-		};
-
-		sel-pins {
-			pins = "gpio167";
-			function = "gpio";
-			bias-disable;
-			drive-strength = <2>;
-		};
-	};
-
 	wcd_default: wcd-reset-n-active-state {
 		pins = "gpio191";
 		function = "gpio";
@@ -1578,7 +1590,7 @@ &usb_1_ss0_hsphy {
 };
 
 &usb_1_ss0_qmpphy_out {
-	remote-endpoint = <&pmic_glink_ss0_ss_in>;
+	remote-endpoint = <&retimer_ss0_ss_in>;
 };
 
 &usb_1_ss1_dwc3_hs {
-- 
2.43.0


^ permalink raw reply related	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-08-04  7:05 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2026-08-03 13:27 [PATCH v2] arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer Xin Liu
2026-08-03 19:35 ` Dmitry Baryshkov
2026-08-04  7:04   ` Xin Liu

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