linux-kernel - Re: [PATCH v2] mfd: stmpe: switch to using gpiod API

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Message-ID: <CACRpkdY1DmywF3UdzBQHSp6N_uwK5MK93Do8TkKExtCVVQHZ2w@mail.gmail.com>
Date:   Tue, 6 Sep 2022 20:58:40 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Lee Jones <lee@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] mfd: stmpe: switch to using gpiod API

On Tue, Sep 6, 2022 at 8:35 PM Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:

> This patch switches the driver away from legacy gpio/of_gpio API to
> gpiod API, and removes use of of_get_named_gpio_flags() which I want to
> make private to gpiolib.
>
> We also need to patch relevant DTS files, as the original code relied on
> the fact that of_get_named_gpio_flags() would fetch any data encoded in
> GPIO flags, even if it does not reflect valid flags for a GPIO.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

> ---
>
> v1->v2:
>  - add DTS changes, as noticed by Francesco Dolcini.
>
> I guess we could do a dance of changing stmpe to check the flags coming
> from DTS and try to distinguish IRQ flags from proper GPIO flags, then
> have a separate patch changing DTSes, and finally a 2nd patch to stmpe
> to use GPIOD API, but I am hoping we could apply this in one go...

It's a mess, let's just apply it and forget about it. It's one of those
trees falling in the forest and noone is there to hear it fall-type of
things.

Yours,
Linus Walleij