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SubjectRe: [PATCH v4 1/2] gpio: Add support for IDT 79RC3243x GPIO controller
Am 2021-04-28 13:07, schrieb Andy Shevchenko:
> On Wed, Apr 28, 2021 at 1:51 AM Michael Walle <michael@walle.cc> wrote:
>> Am 2021-04-26 12:29, schrieb Andy Shevchenko:
>> > On Mon, Apr 26, 2021 at 12:55 PM Thomas Bogendoerfer
>> > <tsbogend@alpha.franken.de> wrote:
>> >
>> > 2) there is gpio-regmap generic code, that may be worth
>> > considering.
>>
>> This driver uses memory mapped registers. While that is
>> also possible with gpio-regmap, there is one drawback:
>> it assumes gpiochip->can_sleep = true for now, see [1].
>> Unfortunately, there is no easy way to ask the regmap
>> if its mmio/fastio.
>
> I don't see how it is an impediment.

You'd have to use the *_cansleep() variants with the gpios,
which cannot be used everywhere, no?

-michael

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