Messages in this thread | | | Date | Wed, 28 Apr 2021 13:57:17 +0200 | From | Michael Walle <> | Subject | Re: [PATCH v4 1/2] gpio: Add support for IDT 79RC3243x GPIO controller |
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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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