Messages in this thread | | | Date | Wed, 28 Apr 2021 00:51:41 +0200 | From | Michael Walle <> | Subject | Re: [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
| |