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

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Message-ID: <5CAB3DF8.7020505@st.com>
Date:   Mon, 8 Apr 2019 12:26:33 +0000
From:   Pascal PAILLET-LME <p.paillet@...com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
CC:     "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

Hello!

Le 04/08/2019 02:05 PM, Linus Walleij a écrit :
> On Wed, Apr 3, 2019 at 3:41 PM Pascal PAILLET-LME <p.paillet@...com> wrote:
>
>> This patch adds stpmic1 support on stm32mp157c ed1 board.
>> The STPMIC1 is a PMIC from STMicroelectronics. The STPMIC1 integrates 10
>> regulators, 3 power switches, a watchdog and an input for a power on key.
>>
>> Signed-off-by: Pascal Paillet <p.paillet@...com>
> OK
>
>> +       /delete-property/dmas;
>> +       /delete-property/dma-names;
> Maybe you can add a comment both to the commit message and the
> DTS file as to why you are doing this?
>
> 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.
> Yours,
> Linus Walleij
>

thank you,
Best Regards,
Pascal