RE: [PATCH v2 1/4] dt-bindings: mfd: Add RZ/V2M PWC

[Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>]

Hi Geert,

Thanks for your feedback!

> From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> Sent: 03 January 2023 08:29
> Subject: Re: [PATCH v2 1/4] dt-bindings: mfd: Add RZ/V2M PWC
> 
> Hi Fabrizio,
> 
> On Wed, Dec 21, 2022 at 10:09 PM Fabrizio Castro
> <fabrizio.castro.jz@xxxxxxxxxxx> wrote:
> > The Renesas RZ/V2M External Power Sequence Controller (PWC)
> > IP is a multi-function device, and it's capable of:
> > * external power supply on/off sequence generation
> > * on/off signal generation for the LPDDR4 core power supply (LPVDD)
> > * key input signals processing
> > * general-purpose output pins
> >
> > Add the corresponding dt-bindings.
> >
> > Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
> > ---
> >
> > v1->v2: I have dropped syscon, simple-mfd, regmap, offset, and the child
> nodes.
> 
> Thanks for the update!
> 
> > +  renesas,rzv2m-pwc-power:
> > +    description: The PWC is used to control the system power supplies.
> > +    type: boolean
> 
> I'm wondering if there is some other way to represent this, e.g.
> using DT topology? Some regulator relation?

Not that I can think of. With respect to power, this IP only generates
control (enable) signals for external regulators, it does not supply
power.

Thanks,
Fab

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-
> m68k.org
> 
> In personal conversations with technical people, I call myself a hacker.
> But
> when I'm talking to journalists I just say "programmer" or something like
> that.
>                                 -- Linus Torvalds