Re: [PATCH] regulator: core: Still free GPIOs using gpio_free()

From: Linus Walleij
Date: Tue Jul 08 2014 - 04:33:34 EST

On Tue, Jul 1, 2014 at 2:27 PM, Mark Brown <broonie@xxxxxxxxxx> wrote:
> On Tue, Jul 01, 2014 at 09:24:22PM +0900, Alexandre Courbot wrote:
>> On Tue, Jul 1, 2014 at 9:11 PM, Mark Brown <broonie@xxxxxxxxxx> wrote:
>> > Huh, good point (though it still seems a bit neater to match up the
>> > request and release functions I guess). Linus?
>> Yeah it's a nice habit to free the GPIOs using the same interface as
>> the one used to obtain them. Although if we are to allow the regulator
>> framework to request GPIO through both the integer and descriptor
>> interfaces, we certainly don't want to track that information forever.
>> On top of that we want to limit the use of gpio_to_desc() and
>> desc_to_gpio() in drivers as much as possible, so I'd say I prefer to
>> see gpiod_free() used no matter where the GPIO came from.
> Right, but Linus said we didn't need this conversion to descriptors so
> I'm a bit confused as to what the issue he was raising was.

Now I'm probably confusing myself...

All drivers should as far as possible use descriptors internally, doing
things like gpio_to_desc() only for backward-compatibility where
necessary, with the intent of eventually ridding the integer interfaces

It may be an eternal project, but hey, we are atleast two of us
pursuing it.

Linus Walleij
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