linux-kernel - Re: [RFC/PATCH] backlight: hx8357: prepare to conversion to gpiod API

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Message-ID: <YzyZJSwy9xsy69WL@google.com>
Date:   Tue, 4 Oct 2022 13:35:49 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Daniel Thompson <daniel.thompson@...aro.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, Lee Jones <lee@...nel.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [RFC/PATCH] backlight: hx8357: prepare to conversion to gpiod API

On Tue, Oct 04, 2022 at 09:50:25PM +0200, Linus Walleij wrote:
> On Tue, Oct 4, 2022 at 2:54 PM Daniel Thompson
> <daniel.thompson@...aro.org> wrote:
> 
> > > We need to know if i.MX is shipping device trees stored in flash,
> > > or if they bundle it with the kernel.
> >
> > This part is frequently found in add-on boards so it's not purely an
> > i.MX-only question.
> 
> Oh
> 
> > IMHO for not-in-the-soc devices like this the presence of in-kernel DTs
> > isn't enough to make a decision. What is needed is a degree of
> > due-diligence to show that there are no obvious out-of-kernel users.
> 
> OK I think this is a good case to use a special quirk in this case.
> I actually envisioned keeping piling them up, and that they would
> not be innumerable.
> 
> Dmitry, could you fix this? Just patch away in gpiolib-of.c.

Sure, I'll add a few quirks. I wonder what is the best way to merge
this? I can create a bunch of IBs to be pulled, or I can send quirks to
you/Bartosz and once they land send the patches to drivers...

Thanks.

-- 
Dmitry