From: Lee Jones <lee@kernel.org>
To: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
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>,
Geert Uytterhoeven <geert+renesas@glider.be>,
"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 2/4] mfd: Add RZ/V2M PWC core driver
Date: Wed, 4 Jan 2023 16:05:02 +0000 [thread overview]
Message-ID: <Y7WjrrSvLanjNhyX@google.com> (raw)
In-Reply-To: <TYWPR01MB877591E80CE112429DE3FC9BC2F59@TYWPR01MB8775.jpnprd01.prod.outlook.com>
> > > > If you do not have any resources to share, you can simply register
> > each
> > > > of the devices via Device Tree. I do not see a valid reason to force
> > a
> > > > parent / child relationship for your use-case.
> > >
> > > There would probably be overlapping on the same memory region, which
> > would
> > > lead to ioremapping the same region multiple times, which is something
> > > I would prefer to avoid if possible.
> >
> > Okay, so you *do* have shared resources.
> >
> > In which case, why is simple-mfd not working for you?
>
> The corresponding dt-bindings got rejected, unfortunately. I had to drop
> simple-mfd as a result of dropping the children of my simple-mfd DT node.
You have to write DT bindings to be OS agnostic.
They *must* match the H/W. Little else matters.
How we interpret those in Linux is flexible however.
--
Lee Jones [李琼斯]
next prev parent reply other threads:[~2023-01-04 16:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-21 21:09 [PATCH v2 0/4] Driver support for RZ/V2M PWC Fabrizio Castro
2022-12-21 21:09 ` [PATCH v2 1/4] dt-bindings: mfd: Add " Fabrizio Castro
2022-12-22 18:09 ` Rob Herring
2023-01-03 8:29 ` Geert Uytterhoeven
2023-01-03 16:29 ` Fabrizio Castro
2022-12-21 21:09 ` [PATCH v2 2/4] mfd: Add RZ/V2M PWC core driver Fabrizio Castro
2023-01-03 8:36 ` Geert Uytterhoeven
2023-01-03 12:05 ` Fabrizio Castro
2023-01-03 12:10 ` Geert Uytterhoeven
2023-01-03 15:00 ` Fabrizio Castro
2023-01-03 12:52 ` Lee Jones
2023-01-03 15:46 ` Fabrizio Castro
2023-01-04 14:34 ` Lee Jones
2023-01-04 15:46 ` Fabrizio Castro
2023-01-04 16:05 ` Lee Jones [this message]
2022-12-21 21:09 ` [PATCH v2 3/4] gpio: Add support for the Renesas RZ/V2M PWC GPIOs Fabrizio Castro
2022-12-29 0:40 ` Linus Walleij
2022-12-21 21:09 ` [PATCH v2 4/4] power: reset: Add new driver for RZ/V2M PWC poweroff Fabrizio Castro
2023-01-02 19:22 ` Sebastian Reichel
2023-01-03 8:26 ` Geert Uytterhoeven
2023-01-05 17:33 ` Fabrizio Castro
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