linux-kernel - Re: [PATCH 18/48] ARM: pxa: hx4700: use gpio descriptors for audio

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Message-ID: <CACRpkdac8dGKSEmc-HpgooJefrDtiKK+_A1Mv7AJM8yQV9UY-w@mail.gmail.com>
Date:   Sun, 1 May 2022 23:41:04 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     robert.jarzmik@...e.fr, linux-arm-kernel@...ts.infradead.org,
        Arnd Bergmann <arnd@...db.de>, Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Philipp Zabel <philipp.zabel@...il.com>,
        Lubomir Rintel <lkundrak@...sk>,
        Paul Parsons <lost.distance@...oo.com>,
        Tomas Cech <sleep_walker@...e.com>,
        Sergey Lapin <slapin@...fans.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Helge Deller <deller@....de>, Mark Brown <broonie@...nel.org>,
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        linux-pm@...r.kernel.org, linux-input@...r.kernel.org,
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Subject: Re: [PATCH 18/48] ARM: pxa: hx4700: use gpio descriptors for audio

On Tue, Apr 19, 2022 at 6:41 PM Arnd Bergmann <arnd@...nel.org> wrote:

> From: Arnd Bergmann <arnd@...db.de>
>
> The audio driver should not use a hardwired gpio number
> from the header. Change it to use a lookup table.
>
> Cc: Philipp Zabel <philipp.zabel@...il.com>
> Cc: Paul Parsons <lost.distance@...oo.com>
> Acked-by: Mark Brown <broonie@...nel.org>
> Acked-by: Robert Jarzmik <robert.jarzmik@...e.fr>
> Cc: alsa-devel@...a-project.org
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

(...)
> +static struct gpiod_lookup_table hx4700_audio_gpio_table = {
> +       .dev_id = "hx4700-audio",
> +       .table = {
> +               GPIO_LOOKUP("gpio-pxa", GPIO75_HX4700_EARPHONE_nDET,
> +                           "earphone-ndet", GPIO_ACTIVE_HIGH),

This looks wrong. The n in nDET in the end of the name of the GPIO line
means active low does it not?

What I usually do when I see this is to properly set it to
GPIO_ACTIVE_LOW in the descriptor table, then invert the logic
where it's getting used.

Also rename to earphone-det instead of -ndet

> +               GPIO_LOOKUP("gpio-pxa", GPIO92_HX4700_HP_DRIVER,
> +                           "hp-driver", GPIO_ACTIVE_HIGH),
> +               GPIO_LOOKUP("gpio-pxa", GPIO107_HX4700_SPK_nSD,
> +                           "spk-nsd", GPIO_ACTIVE_HIGH),

Same here. Rename spk-sd

Yours,
Linus Walleij