linux-kernel - Re: [PATCH 3/6] gpio: Add GPIO support for the ST Multi-Function eXpander

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Date:   Thu, 22 Feb 2018 15:33:31 +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 3/6] gpio: Add GPIO support for the ST Multi-Function
 eXpander



On 02/22/2018 02:47 PM, Linus Walleij wrote:
> On Thu, Feb 8, 2018 at 3:27 PM, Amelie Delaunay <amelie.delaunay@...com> wrote:
> 
>> ST Multi-Function eXpander (MFX) can be used as GPIO expander.
>> It has 16 fast GPIOs and can have 8 extra alternate GPIOs
>> when other MFX features are not enabled.
>>
>> Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
> 
> As mentioned I think this driver needs to:
> 
> - Move to drivers/pinctrl/pinctrl-stmfx.c similar to the sx150x controller.
> - Pass a regmap around instead of the custom accessor functions.

I study this right now!
Thanks,
Amelie

> - Maybe refactor and reuse STMPE infrastructure
> 
> Yours,
> Linus Walleij
>