Re: [PATCH v3 4/4] arm64: dts: qcom: Add base PURWA-IOT-EVK board

[Yijie Yang]

On 1/13/2026 6:52 PM, Dmitry Baryshkov wrote:
> On Tue, Jan 13, 2026 at 06:28:16PM +0800, YijieYang wrote:
> > From: Yijie Yang <yijie.yang@xxxxxxxxxxxxxxxx>
> >
> > The PURWA-IOT-EVK is an evaluation platform for IoT products, composed of
> > the Purwa IoT SoM and a carrier board. Together, they form a complete
> > embedded system capable of booting to UART.
> >
> > PURWA-IOT-EVK uses the PS8833 as a retimer for USB0, unlike HAMOA-IOT-EVK.
> > Meanwhile, USB0 bypasses the SBU selector FSUSB42. As a result, the glink
> > topology differs from that of HAMOA-IOT-EVK.
>
> What is "glink topology"?

What I’m referring to here is that the graph composed of glink nodes and 
their peers.

> > Make the following peripherals on the carrier board enabled:
> > - UART
> > - On-board regulators
> > - USB Type-C mux
> > - Pinctrl
> > - Embedded USB (EUSB) repeaters
> > - NVMe
> > - pmic-glink
> > - USB DisplayPorts
> > - Bluetooth
> > - WLAN
> > - Audio
> > - PCIe ports for PCIe3 through PCIe6a
> >
> > Signed-off-by: Yijie Yang <yijie.yang@xxxxxxxxxxxxxxxx>
> > ---
> >   arch/arm64/boot/dts/qcom/Makefile             |   1 +
> >   .../{hamoa-iot-evk.dts => purwa-iot-evk.dts}  | 102 +++++++++++-------
> >   2 files changed, 65 insertions(+), 38 deletions(-)
> >   copy arch/arm64/boot/dts/qcom/{hamoa-iot-evk.dts => purwa-iot-evk.dts} (95%)
> >
> > @@ -1102,9 +1140,7 @@ edp_bl_reg_en: edp-bl-reg-en-state {
> >   		pins = "gpio10";
> >   		function = "normal";
> >   	};
> > -};
> >   
> > -&pmc8380_3_gpios {
>
> This needs to be fixed in hamoa-iot-evk.dtsi.

Will do.

> >   	pm_sde7_aux_3p3_en: pcie-aux-3p3-default-state {
> >   		pins = "gpio8";
> >   		function = "normal";
> > @@ -1171,16 +1207,6 @@ &smb2360_2_eusb2_repeater {
> >   	vdd3-supply = <&vreg_l8b_3p0>;
> >   };
> >   
> > -&spi11 {
> > -	status = "okay";
> > -
> > -	tpm@0 {
> > -		compatible = "st,st33htpm-spi", "tcg,tpm_tis-spi";
>
> No TPM on the board?

It has not been verified yet since this patch set was sent out; I will 
add it.

> > -		reg = <0>;
> > -		spi-max-frequency = <20000000>;
> > -	};
> > -};
> > -
> >   &swr0 {
> >   	status = "okay";
> >   
> > @@ -1470,7 +1496,7 @@ &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 {
> > --
> > 2.34.1

--
Best Regards,
Yijie