linux-kernel - Re: [PATCH 4/6] ARM: dts: stm32: add MFX support on I2C1 on stm32746g-eval

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Message-ID: <9d66c639-7f3e-86f3-e744-237b4be31d09@st.com>
Date:   Thu, 22 Feb 2018 15:34:28 +0000
From:   Amelie DELAUNAY <amelie.delaunay@...com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 4/6] ARM: dts: stm32: add MFX support on I2C1 on
 stm32746g-eval



On 02/22/2018 02:54 PM, Linus Walleij wrote:
> On Thu, Feb 8, 2018 at 3:27 PM, Amelie Delaunay <amelie.delaunay@...com> wrote:
> 
>> MFX is used as gpio expander on stm32746g-eval.
>>
>> Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
> 
> (...)
>> +       mfx: mfx@42 {
>> +               compatible = "st,mfx";
>> +               reg = <0x42>;
>> +               interrupts = <8 1>;
>> +               interrupt-parent = <&gpioi>;
>> +               interrupt-controller;
>> +               #interrupt-cells = <1>;
>> +
>> +               mfxgpio: mfx_gpio {
>> +                       compatible = "st,mfx-gpio";
>> +                       interrupts = <0>;
>> +                       interrupt-parent = <&mfx>;
>> +                       gpio-controller;
>> +                       #gpio-cells = <2>;
> 
> So I think this node should contain some pin config states
> that can  be referenced by the drivers to set up push/pull
> etc. Probably it can use just standard pin config properties
> like sx150x.
> 

I will check that point.

Regards,
Amelie

> Yours,
> Linus Walleij
>