linux-kernel - Re: [PATCH 5/6] mtd: rawnand: ams-delta: use GPIO lookup table

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Message-ID: <CAHp75VdNUW6KoM6oupyQ80A1WVRk7vewwDt6WEZOyjrAUifqRg@mail.gmail.com>
Date:   Sat, 19 May 2018 00:21:14 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Janusz Krzysztofik <jmkrzyszt@...il.com>
Cc:     Tony Lindgren <tony@...mide.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Mark Brown <broonie@...nel.org>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Richard Weinberger <richard@....at>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Jarkko Nikula <jarkko.nikula@...mer.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-input <linux-input@...r.kernel.org>,
        "open list:MEMORY TECHNOLOGY..." <linux-mtd@...ts.infradead.org>,
        linux-fbdev@...r.kernel.org,
        ALSA Development Mailing List <alsa-devel@...a-project.org>
Subject: Re: [PATCH 5/6] mtd: rawnand: ams-delta: use GPIO lookup table

On Sat, May 19, 2018 at 12:09 AM, Janusz Krzysztofik
<jmkrzyszt@...il.com> wrote:

> +       gpiod_rdy = devm_gpiod_get_optional(&pdev->dev, "rdy", GPIOD_IN);
> +       if (!IS_ERR_OR_NULL(gpiod_rdy)) {

So, is it optional or not at the end?
If it is, why do we check for NULL?

>                 this->dev_ready = ams_delta_nand_ready;
>         } else {
>                 this->dev_ready = NULL;
>                 pr_notice("Couldn't request gpio for Delta NAND ready.\n");

dev_notice() ?

>         }

> +err_gpiod:
> +       if (err == -ENODEV || err == -ENOENT)
> +               err = -EPROBE_DEFER;

Hmm...

-- 
With Best Regards,
Andy Shevchenko