linux-kernel - Re: [PATCH 1/3] ARM: dts: stm32: add stpmic1 support on stm32mp157c ed1 board

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Message-ID: <CACRpkdY1Vd_xDgoF8NaJ85Dy+ub0-GPTdU9sttB5uzmJnRXw2g@mail.gmail.com>
Date:   Mon, 8 Apr 2019 15:06:52 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Pascal PAILLET-LME <p.paillet@...com>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "horms+renesas@...ge.net.au" <horms+renesas@...ge.net.au>,
        "olof@...om.net" <olof@...om.net>, "arnd@...db.de" <arnd@...db.de>,
        "geert+renesas@...der.be" <geert+renesas@...der.be>,
        "biju.das@...renesas.com" <biju.das@...renesas.com>,
        Yannick FERTRE <yannick.fertre@...com>,
        "m.szyprowski@...sung.com" <m.szyprowski@...sung.com>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] ARM: dts: stm32: add stpmic1 support on stm32mp157c
 ed1 board

On Mon, Apr 8, 2019 at 2:26 PM Pascal PAILLET-LME <p.paillet@...com> wrote:

> > I hope you are not trying to work around a bug in the driver by
> > stripping out DMA configuration from the device tree, because then
> > it is probably a better idea to fix the bug.

> This is not a workaround. The PMIC can use the DMA over I2C bus.
> Our goal is to avoid using a DMA channel for a consumer that generates a
> very few traffic. Dma channels may lack for other use cases.
>
> If you agree, you can add the to the commit message.

OK I understand, then also write it directly in the dts as a comment,
so people understand why it is being removed when they just look
in the device tree.

Yours,
Linus Walleij