linux-kernel - Re: [PATCH 26/46] ARM: pxa: zylonite: use gpio lookup instead mfp header

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Date:   Tue, 5 Nov 2019 10:28:12 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Linux Input <linux-input@...r.kernel.org>
Subject: Re: [PATCH 26/46] ARM: pxa: zylonite: use gpio lookup instead mfp header

On Fri, Oct 18, 2019 at 5:42 PM Arnd Bergmann <arnd@...db.de> wrote:

> The mach/mfp.h header is only used by this one driver
> for hardcoded gpio numbers. Change that to use a lookup
> table instead.
>
> Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
> Cc: linux-input@...r.kernel.org
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
(...)
> +               GPIO_LOOKUP("gpio-pxa", mfp_to_gpio(MFP_PIN_GPIO15),
> +                           "touch", GPIO_ACTIVE_LOW),

What I tried to do with code like this, when I was ambitious,
was to wind out mfp_to_gpio() as well and either just encode
the offset on gpio-pxa as a define locally.

But this works too, the kernel looks better after than before
and I am not perfectionist, so:
Acked-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij