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From:   Fabrizio Castro <fabrizio.castro.jz@renesas.com>
To:     Geert Uytterhoeven <geert@linux-m68k.org>
CC:     Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Sebastian Reichel <sre@kernel.org>, Lee Jones <lee@kernel.org>,
        "linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
        Chris Paterson <Chris.Paterson2@renesas.com>,
        Biju Das <biju.das@bp.renesas.com>,
        "linux-renesas-soc@vger.kernel.org" 
        <linux-renesas-soc@vger.kernel.org>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Jacopo Mondi <jacopo@jmondi.org>
Subject: RE: [PATCH v2 1/4] dt-bindings: mfd: Add RZ/V2M PWC
Thread-Topic: [PATCH v2 1/4] dt-bindings: mfd: Add RZ/V2M PWC
Thread-Index: AQHZFYCKWr09zSoo0UegvxITN4qezq6Mb/GAgAB861A=
Date:   Tue, 3 Jan 2023 16:29:18 +0000
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Hi Geert,

Thanks for your feedback!

> From: Geert Uytterhoeven <geert@linux-m68k.org>
> Sent: 03 January 2023 08:29
> Subject: Re: [PATCH v2 1/4] dt-bindings: mfd: Add RZ/V2M PWC
>=20
> Hi Fabrizio,
>=20
> On Wed, Dec 21, 2022 at 10:09 PM Fabrizio Castro
> <fabrizio.castro.jz@renesas.com> 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@renesas.com>
> > ---
> >
> > v1->v2: I have dropped syscon, simple-mfd, regmap, offset, and the chil=
d
> nodes.
>=20
> Thanks for the update!
>=20
> > +  renesas,rzv2m-pwc-power:
> > +    description: The PWC is used to control the system power supplies.
> > +    type: boolean
>=20
> 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

>=20
> Gr{oetje,eeting}s,
>=20
>                         Geert
>=20
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-
> m68k.org
>=20
> 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