Hi,
Am 2021-04-26 12:29, schrieb Andy Shevchenko:
On Mon, Apr 26, 2021 at 12:55 PM Thomas Bogendoerfer
<tsbogend@xxxxxxxxxxxxxxxx> 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
