Re: [PATCH v2 1/2] dt-bindings: soc: tegra: Document Nvidia Tegra modem pwrseq

[Bartosz Golaszewski]

On Tue, May 26, 2026 at 2:29 PM Svyatoslav Ryhel <clamor95@xxxxxxxxx> wrote:
>
> вт, 26 трав. 2026 р. о 14:14 Bartosz Golaszewski <brgl@xxxxxxxxxx> пише:
> >
> > On Tue, 26 May 2026 12:03:59 +0200, Svyatoslav Ryhel <clamor95@xxxxxxxxx> said:
> > > вт, 26 трав. 2026 р. о 12:51 Bartosz Golaszewski <brgl@xxxxxxxxxx> пише:
> > >>
> > >> On Sat, May 23, 2026 at 10:51 AM Svyatoslav Ryhel <clamor95@xxxxxxxxx> wrote:
> > >> >
> > >> > Document the Tegra modem pwseq used by various devices based on the Nvidia
> > >> > Tegra SoC, describing its usage. The power sequence provides interaction
> > >> > between the modem and SoC-specific interface configurations.
> > >> >
> > >> > Signed-off-by: Svyatoslav Ryhel <clamor95@xxxxxxxxx>
> > >> > ---
> > >>
> > >> ...
> > >>
> > >> > +
> > >> > +examples:
> > >> > +  - |
> > >> > +    #include <dt-bindings/gpio/gpio.h>
> > >> > +
> > >> > +    pwrseq-modem {
> > >> > +        compatible = "nvidia,tegra-modem-pwrseq";
> > >> > +
> > >> > +        enable-gpios = <&gpio 165 GPIO_ACTIVE_HIGH>;
> > >> > +        power-supply = <&vdd_3v3_vbat>;
> > >> > +
> > >> > +        nvidia,usb-bus = <&usb2>;
> > >> > +    };
> > >> > --
> > >> > 2.51.0
> > >> >
> > >>
> > >> I assume there's no such component as the tegra modem *pwrseq*?
> > >
> > > Hardware component, I assume no.
> > >
> > >> What is the relationship between this node and the "infineon,xmm6260"
> > >> compatible node?
> > >>
> > >
> > > The xmm6260 has a phandle reference to it. Since there is consumer
> > > matching logic in the pwrseq driver I am leaning towards removing this
> > > node entirely. This patches is still in non-final stage and I would
> > > like to hear any opinions on the way to improving it.
> > >
> >
> > The node attached to the pwrseq provider device should represent a real
> > hardware component. Are the enable-gpios and power-supply lines connected
> > to the modem package?
>
> Yes, enable-gpio is connected to the modem and signals that USB is set
> and ready to work with the modem, while power-supply is an optional
> supply connected to the modem's vbus input.
>

The modem is a hard-wired USB device? Do you implement it as a
platform driver or a USB driver?

Is there a connector of any kind that could be used as the HW
component represented by the pwrseq device?

Bart