linux-kernel - Re: [PATCH v2] gpiolib: Defer on non-DT find_chip_by

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Message-ID: <CACRpkdZ4P+PhKCb=2rmT5unrzJLkYkCiWDBDMptxZVp7OdcGBg@mail.gmail.com>
Date:   Mon, 9 Jul 2018 15:18:04 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Janusz Krzysztofik <jmkrzyszt@...il.com>
Cc:     Boris Brezillon <boris.brezillon@...tlin.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [PATCH v2] gpiolib: Defer on non-DT find_chip_by_name() failure

On Wed, Jul 4, 2018 at 12:18 AM Janusz Krzysztofik <jmkrzyszt@...il.com> wrote:

> Avoid replication of error code conversion in non-DT GPIO consumers'
> code by returning -EPROBE_DEFER from gpiod_find() in case a chip
> identified by its label in a registered lookup table is not ready.
>
> See https://lkml.org/lkml/2018/5/30/176 for example case.
>
> Suggested-by: Boris Brezillon <boris.brezillon@...tlin.com>
> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@...il.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@...tlin.com>
> ---
> Changelog
> v2: fix typo (latar -> later) - thanks Boris and Andy for catching this

Patch applied as the discussion seems to conclude this should
work fine, I hope we will notice if it doesn't!

Yours,
Linus Walleij