From: Mark Brown <broonie@kernel.org>
To: Michael Walle <michael@walle.cc>
Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>
Subject: Re: [PATCH 1/2] regmap: add regmap_might_sleep()
Date: Fri, 30 Apr 2021 16:19:09 +0100 [thread overview]
Message-ID: <20210430151908.GC5981@sirena.org.uk> (raw)
In-Reply-To: <20210430130645.31562-1-michael@walle.cc>
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On Fri, Apr 30, 2021 at 03:06:44PM +0200, Michael Walle wrote:
> Sometimes a driver needs to know if the underlying regmap could sleep.
> For example, consider the gpio-regmap driver which needs to fill the
> gpiochip->can_sleep property.
Whatever is creating the regmap really ought to know what device it's
dealing with...
> It might be possible to pass this information via the
> gpio_regmap_config, but this has the following drawbacks. First, that
> property is redundant and both places might contratict each other. And
> secondly, the driver might not even know the type of the regmap because
> it just gets an opaque pointer by querying the device tree.
If it's a generic GPIO driver from a code correctness point of view it's
always got a risk of sleeping...
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next prev parent reply other threads:[~2021-04-30 15:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-30 13:06 [PATCH 1/2] regmap: add regmap_might_sleep() Michael Walle
2021-04-30 13:06 ` [PATCH 2/2] gpio: regmap: use new regmap_might_sleep() Michael Walle
2021-04-30 15:19 ` Mark Brown [this message]
2021-04-30 16:01 ` [PATCH 1/2] regmap: add regmap_might_sleep() Michael Walle
2021-04-30 17:26 ` Mark Brown
2021-04-30 22:10 ` Michael Walle
2021-05-06 12:43 ` Mark Brown
2021-05-06 13:35 ` Michael Walle
2021-05-06 15:53 ` Mark Brown
-- strict thread matches above, loose matches on Subject: below --
2022-11-21 15:08 Michael Walle
2022-11-22 19:43 ` Mark Brown
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