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Date: Thu, 28 Mar 2024 11:03:23 -0700
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: David Lechner <dlechner@baylibre.com>
Cc: Jonathan Corbet <corbet@lwn.net>, Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, Jean Delvare <jdelvare@suse.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Support Opensource <support.opensource@diasemi.com>,
	Cosmin Tanislav <cosmin.tanislav@analog.com>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Michael Hennerich <Michael.Hennerich@analog.com>,
	Jonathan Cameron <jic23@kernel.org>,
	Antoniu Miclaus <antoniu.miclaus@analog.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-hwmon@vger.kernel.org, linux-iio@vger.kernel.org,
	linux-staging@lists.linux.dev, linux-input@vger.kernel.org
Subject: Re: [PATCH RFC 1/7] regulator: devres: add APIs for reference
 supplies
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References: <20240327-regulator-get-enable-get-votlage-v1-0-5f4517faa059@baylibre.com>
 <20240327-regulator-get-enable-get-votlage-v1-1-5f4517faa059@baylibre.com>
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In-Reply-To: <20240327-regulator-get-enable-get-votlage-v1-1-5f4517faa059@baylibre.com>

On Wed, Mar 27, 2024 at 06:18:50PM -0500, David Lechner wrote:
> A common use case for regulators is to supply a reference voltage to an
> analog input or output device. This adds two new devres APIs to get,
> enable, and get the voltage in a single call. This allows eliminating
> boilerplate code in drivers that use reference supplies in this way.
> 
> devm_regulator_get_enable_get_voltage() is intended for cases where the
> supply is required to provide an external reference voltage.
> 
> devm_regulator_get_optional_enable_get_voltage() is intended for cases
> where the supply is optional and device typically uses an internal
> reference voltage if the supply is not available.

So because we decided that we could not have devm_regulator_enable()
because of (IMO) contrived example of someone totally mixing up the devm
and non-devm APIs we now have to make more and more devm- variants
simply because we do not have access to the regulator structure with
devm_regulator_get_enable() and so all normal APIs are not available.

This is quite bad honestly. Mark, could we please reverse this
shortsighted decision and have normal devm_regulator_enable() operating
on a regulator?

Thanks.

-- 
Dmitry