From mboxrd@z Thu Jan  1 00:00:00 1970
From: Amelie DELAUNAY <amelie.delaunay@st.com>
Subject: Re: [PATCH 4/6] ARM: dts: stm32: add MFX support on I2C1 on
 stm32746g-eval
Date: Thu, 22 Feb 2018 15:34:28 +0000
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To: Linus Walleij <linus.walleij@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>, "open list:OPEN FIRMWARE AND FLATTENED DEVICE
 TREE BINDINGS" <devicetree@vger.kernel.org>, Alexandre TORGUE <alexandre.torgue@st.com>, Russell King <linux@armlinux.org.uk>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>, Rob Herring <robh+dt@kernel.org>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Lee Jones <lee.jones@linaro.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>
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On 02/22/2018 02:54 PM, Linus Walleij wrote:
> On Thu, Feb 8, 2018 at 3:27 PM, Amelie Delaunay <amelie.delaunay@st.com> wrote:
> 
>> MFX is used as gpio expander on stm32746g-eval.
>>
>> Signed-off-by: Amelie Delaunay <amelie.delaunay@st.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
>