lkml.org 
[lkml]   [2022]   [May]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [RFC v2 10/39] gpio: add HAS_IOPORT dependencies
On Fri, Apr 29, 2022 at 5:37 PM William Breathitt Gray
<william.gray@linaro.org> wrote:
> On Fri, Apr 29, 2022 at 04:46:00PM +0200, Niklas Schnelle wrote:

> > Good question. As far as I can see most (all?) of these have "select
> > ISA_BUS_API" which is "def_bool ISA". Now "config ISA" seems to
> > currently be repeated in architectures and doesn't have an explicit
> > HAS_IOPORT dependency (it maybe should have one). But it does only make
> > sense on architectures with HAS_IOPORT set.
>
> There is such a thing as ISA DMA, but you'll still need to initialize
> the device via the IO Port bus first, so perhaps setting HAS_IOPORT for
> "config ISA" is the right thing to do: all ISA devices are expected to
> communicate in some way via ioport.

Adding that dependency seems like the right solution to me.

Yours,
Linus Walleij

\
 
 \ /
  Last update: 2022-05-01 23:56    [W:0.163 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site