Re: [PATCH v2] arm64: dts: qcom: hamoa-iot-evk: switch typec0 to PS8830 retimer
Xin Liu <[email protected]>
| Newsgroups | gmane.linux.ports.arm.msm,gmane.linux.drivers.devicetree,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
On 8/4/2026 3:35 AM, Dmitry Baryshkov wrote: > On Mon, Aug 03, 2026 at 06:27:47AM -0700, 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. > Why is it still present on the PCB? The FSUSB42 is retained on the PCB as a fallback for the PS8830's SBU mux function. Should the PS8830's SBU path encounter any issues, the FSUSB42 can be activated with a simple rework to quickly switch to a discrete solution, avoiding a full board respin. Thanks, Xin >> 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 <[email protected]> >> Signed-off-by: Xin Liu <[email protected]> > Reviewed-by: Dmitry Baryshkov <[email protected]> > >