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SubjectRe: [PATCH v4 1/2] gpio: Add support for IDT 79RC3243x GPIO controller
Hi,

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.

-michael

[1]
https://elixir.bootlin.com/linux/v5.12/source/drivers/gpio/gpio-regmap.c#L257

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