Re: [PATCH v3 2/2] arm64: dts: qcom: Add PCIe3 and PCIe5 regulators for HAMAO-IOT-EVK board

[Ziyue Zhang]

On 11/13/2025 5:16 AM, Dmitry Baryshkov wrote:
> On Wed, Nov 12, 2025 at 05:03:16PM +0800, Ziyue Zhang wrote:
> > HAMAO IoT EVK uses PCIe5 to connect an SDX65 module for WWAN functionality
> > and PCIe3 to connect a SATA controller. These interfaces require multiple
> > voltage rails: PCIe5 needs 3.3V supplied by vreg_wwan, while PCIe3 requires
> > 12V, 3.3V, and 3.3V AUX rails, controlled via PMIC GPIOs.
> >
> > Add the required fixed regulators with related pin configuration, and
> > connect them to the PCIe3 and PCIe5 ports to ensure proper power for the
> > SDX65 module and SATA controller.
> >
> > Signed-off-by: Ziyue Zhang <ziyue.zhang@xxxxxxxxxxxxxxxx>
> > Reviewed-by: Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
> > ---
> >   arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 83 ++++++++++++++++++++++
> >   1 file changed, 83 insertions(+)
> >
> > +&pmc8380_3_gpios {
> > +	pm_sde7_aux_3p3_en: pcie-aux-3p3-default-state {
> What is sde7? Other than that:
>
>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
Hi Dmitry

I’m not sure what “sde7” refers to specifically. I saw this name in the

schematic, and the pin is labeled PM_SDE7_AUX_3P3, so I used that naming

in the DT.


BRs

Ziyue

> > +		pins = "gpio8";
> > +		function = "normal";
> > +		output-enable;
> > +		output-high;
> > +		bias-pull-down;
> > +		power-source = <0>;
> > +	};
> > +
> > +	pm_sde7_main_3p3_en: pcie-main-3p3-default-state {
> > +		pins = "gpio6";
> > +		function = "normal";
> > +		output-enable;
> > +		output-high;
> > +		bias-pull-down;
> > +		power-source = <0>;
> > +	};
> > +};
> > +
> >   &pmc8380_5_gpios {
> >   	usb0_pwr_1p15_reg_en: usb0-pwr-1p15-reg-en-state {
> >   		pins = "gpio8";
> > --
> > 2.34.1