[PATCH v3 0/3] arm64: dts: qcom: PS8830 retimer clock fixes and typec0 enablement

[PATCH v3 0/3] arm64: dts: qcom: PS8830 retimer clock fixes and typec0 enablement

[Xin Liu]

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.

Compared with v2, two new patches (1/3 and 2/3) are added. During the
v2 review [1], Konrad pointed out a suspicious clock reference. Further
checking confirmed that every PS8830 retimer on both Purwa and Hamoa
has its own on-board 25 MHz crystal wired to its XI/XO pins, so the
existing clock properties in the DTS are wrong and should be fixed.

[1] https://lore.kernel.org/all/049be278-8958-4d04-8501-7fb60d2169cc@oss.qualcomm.com/

Patch 1/3: Purwa, switch the three PS8830 nodes to on-board crystals (Fixes).
Patch 2/3: Hamoa, same for the two existing PS8830 nodes (Fixes).
Patch 3/3: Hamoa, add the typec0 PS8830 on I2C3 and drop the unused FSUSB42.

Tested on the Hamoa IoT EVK:
  - USB 3.0 SuperSpeed at 5 Gbps on typec0
  - DisplayPort Alt Mode on typec0

This series is based on the qcom tree's for-next branch
(git://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git for-next).

BR,
Xin Liu


Changes in v3:
 - Add purwa-iot-evk clock fix patch (1/3): replace RPMH RF clocks with
   per-retimer fixed-clock nodes inside a new clocks {} container node
 - Add hamoa-iot-evk clock fix patch (2/3): same fix for the two existing
   PS8830 retimers on hamoa
 - Replace RPMH RF clock in hamoa typec0 patch (3/3) with fixed-clock node
   inside the existing clocks {} container node
 - Split previous single hamoa patch into a clock fix (2/3) and the typec0
   feature patch (3/3)
- Link to v2: https://lore.kernel.org/all/20260803132753.994619-1-xin.liu@oss.qualcomm.com/

Changes in v2:
 - Updated the commit message to clarify that FSUSB42 is present on
   PCB but with all signal lines unconnected (NC), rather than
   "won't be populated"

Note: Changes in v2 and the Link above apply to patch 3/3 only.

- Link to v1: https://lore.kernel.org/all/20260721074145.1534100-1-xin.liu@oss.qualcomm.com/

Xin Liu (3):
  arm64: dts: qcom: purwa-iot-evk: use on-board crystal for PS8830
    retimers
  arm64: dts: qcom: hamoa-iot-evk: use on-board crystal for PS8830
    retimers
  arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer

 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 130 +++++++++++++--------
 arch/arm64/boot/dts/qcom/purwa-iot-evk.dts |  27 ++++-
 2 files changed, 103 insertions(+), 54 deletions(-)

--
2.43.0

base-commit: a9d7ced84989ec05be09b4b8428759ef60450a0f

[PATCH v3 1/3] arm64: dts: qcom: purwa-iot-evk: use on-board crystal for PS8830 retimers

[Xin Liu]

On the Purwa IoT EVK, each PS8830 retimer has its own 25 MHz crystal
wired to the retimer's XI/XO pins. The reference clock does not come
from the PMIC, so the RPMH_RF_CLK4/5 references in the retimer nodes
are wrong: they keep those RF clocks enabled for nothing and describe a
connection that does not exist on the board.

Remove the stale "Left unused" annotation from the vreg_rtmr0 regulators
as the retimer is actively used.

Fixes: 9ed20e877239 ("arm64: dts: qcom: Add base PURWA-IOT-EVK board")
Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
---
v3: New patch.
---
 arch/arm64/boot/dts/qcom/purwa-iot-evk.dts | 27 ++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts b/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
index 6fc6fe7c0899..4380a46b33b2 100644
--- a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
@@ -60,6 +60,26 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	clocks {
+		clk_rtmr0_xo: clock-rtmr0-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+
+		clk_rtmr1_xo: clock-rtmr1-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+
+		clk_rtmr2_xo: clock-rtmr2-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+	};
+
 	connector3 {
 		compatible = "usb-a-connector";
 		label = "USB-3-Type-A";
@@ -295,7 +315,6 @@ 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";
 
@@ -639,7 +658,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x08>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK5>;
+		clocks = <&clk_rtmr2_xo>;
 
 		vdd-supply = <&vreg_rtmr2_1p15>;
 		vdd33-supply = <&vreg_rtmr2_3p3>;
@@ -696,7 +715,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x8>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK4>;
+		clocks = <&clk_rtmr0_xo>;
 
 		vdd-supply = <&vreg_rtmr0_1p15>;
 		vdd33-supply = <&vreg_rtmr0_3p3>;
@@ -801,7 +820,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x8>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK4>;
+		clocks = <&clk_rtmr1_xo>;
 
 		vdd-supply = <&vreg_rtmr1_1p15>;
 		vdd33-supply = <&vreg_rtmr1_3p3>;
-- 
2.43.0

[PATCH v3 2/3] arm64: dts: qcom: hamoa-iot-evk: use on-board crystal for PS8830 retimers

[Xin Liu]

On the Hamoa IoT EVK, each of the two existing PS8830 retimers has its
own 25 MHz crystal wired to the retimer's XI/XO pins. The reference
clock does not come from the PMIC, so the RPMH_RF_CLK4/5 references in
the retimer nodes are wrong: they keep those RF clocks enabled for
nothing and describe a connection that does not exist on the board.

Fixes: c11645afb0e2 ("arm64: dts: qcom: Add base HAMOA-IOT-EVK board")
Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
---
v3: New patch.
---
 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
index 776bded3a312..57c8ae2e7d4c 100644
--- a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
@@ -35,6 +35,18 @@ mcp2518fd_osc: clock-40000000 {
 			clock-frequency = <40000000>;
 			#clock-cells = <0>;
 		};
+
+		clk_rtmr1_xo: clock-rtmr1-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+
+		clk_rtmr2_xo: clock-rtmr2-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
 	};
 
 	wcd938x: audio-codec {
@@ -699,7 +711,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x08>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK5>;
+		clocks = <&clk_rtmr2_xo>;
 
 		vdd-supply = <&vreg_rtmr2_1p15>;
 		vdd33-supply = <&vreg_rtmr2_3p3>;
@@ -814,7 +826,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x8>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK4>;
+		clocks = <&clk_rtmr1_xo>;
 
 		vdd-supply = <&vreg_rtmr1_1p15>;
 		vdd33-supply = <&vreg_rtmr1_3p3>;
-- 
2.43.0

[PATCH v3 3/3] arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer

[Xin Liu]

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. The chip is retained as a hardware fallback: should the PS8830's
SBU path encounter issues, the FSUSB42 can be activated with a simple
rework, avoiding a full board respin.

Co-developed-by: Guodong Xu <guodong.xu@oss.qualcomm.com>
Signed-off-by: Guodong Xu <guodong.xu@oss.qualcomm.com>
Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
v3: Replace RPMH_RF_CLK4 reference with a fixed-clock node; split off
    clock fix into a separate patch (2/3).
v2: Updated the commit message to clarify that FSUSB42 is present on
    PCB but with all signal lines unconnected (NC).
---
 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 114 ++++++++++++---------
 1 file changed, 66 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 57c8ae2e7d4c..a4a2a1fccf11 100644
--- a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
@@ -36,6 +36,12 @@ mcp2518fd_osc: clock-40000000 {
 			#clock-cells = <0>;
 		};
 
+		clk_rtmr0_xo: clock-rtmr0-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+
 		clk_rtmr1_xo: clock-rtmr1-xo {
 			compatible = "fixed-clock";
 			clock-frequency = <25000000>;
@@ -138,15 +144,15 @@ 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>;
 					};
 				};
 			};
@@ -315,7 +321,6 @@ 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";
 
@@ -644,25 +649,6 @@ 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>;
-			};
-		};
-	};
-
 	wifi-bt-connector {
 		compatible = "pcie-m2-e-connector";
 		vpcie3v3-supply = <&vreg_wcn_3p3>;
@@ -759,6 +745,62 @@ retimer_ss2_con_sbu_out: endpoint {
 	};
 };
 
+&i2c3 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	typec-mux@8 {
+		compatible = "parade,ps8830";
+		reg = <0x08>;
+
+		clocks = <&clk_rtmr0_xo>;
+
+		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>;
 
@@ -1413,30 +1455,6 @@ 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";
@@ -1524,7 +1542,7 @@ &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

Re: [PATCH v3 1/3] arm64: dts: qcom: purwa-iot-evk: use on-board crystal for PS8830 retimers

[Konrad Dybcio]

On 9/14/26 12:12 PM, Xin Liu wrote:
> On the Purwa IoT EVK, each PS8830 retimer has its own 25 MHz crystal
> wired to the retimer's XI/XO pins. The reference clock does not come
> from the PMIC, so the RPMH_RF_CLK4/5 references in the retimer nodes
> are wrong: they keep those RF clocks enabled for nothing and describe a
> connection that does not exist on the board.
> 
> Remove the stale "Left unused" annotation from the vreg_rtmr0 regulators
> as the retimer is actively used.
> 
> Fixes: 9ed20e877239 ("arm64: dts: qcom: Add base PURWA-IOT-EVK board")
> Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH v3 2/3] arm64: dts: qcom: hamoa-iot-evk: use on-board crystal for PS8830 retimers

[Konrad Dybcio]

On 9/14/26 12:12 PM, Xin Liu wrote:
> On the Hamoa IoT EVK, each of the two existing PS8830 retimers has its
> own 25 MHz crystal wired to the retimer's XI/XO pins. The reference
> clock does not come from the PMIC, so the RPMH_RF_CLK4/5 references in
> the retimer nodes are wrong: they keep those RF clocks enabled for
> nothing and describe a connection that does not exist on the board.
> 
> Fixes: c11645afb0e2 ("arm64: dts: qcom: Add base HAMOA-IOT-EVK board")
> Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH v3 3/3] arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer

[Konrad Dybcio]

On 9/14/26 12:12 PM, Xin Liu wrote:
> 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. The chip is retained as a hardware fallback: should the PS8830's
> SBU path encounter issues, the FSUSB42 can be activated with a simple
> rework, avoiding a full board respin.
> 
> Co-developed-by: Guodong Xu <guodong.xu@oss.qualcomm.com>
> Signed-off-by: Guodong Xu <guodong.xu@oss.qualcomm.com>
> Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---

[...]

> +&i2c3 {
> +	clock-frequency = <400000>;
> +	status = "okay";

In case you need to resend, please add a \n before 'status'

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad