lkml.org 
[lkml]   [2019]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] ASoC: fsl_sai: add IRQF_SHARED
Hi Daniel,

Am 2019-12-05 09:43, schrieb Daniel Baluta:
> On Fri, Nov 29, 2019 at 12:40 AM Michael Walle <michael@walle.cc>
> wrote:
>>
>> The LS1028A SoC uses the same interrupt line for adjacent SAIs. Use
>> IRQF_SHARED to be able to use these SAIs simultaneously.
>
> Hi Michael,
>
> Thanks for the patch. We have a similar change inside our internal tree
> (it is on my long TODO list to upstream :D).
>
> We add the shared flag conditionally on a dts property.
>
> Do you think it is a good idea to always add shared flag? I'm thinking
> on SAI IP integrations where the interrupt is edge triggered.

Mhh, I don't really get the point to make the flag conditionally. If
there is only one user, the flag won't hurt, correct?

If there are two users, we need the flag anyway.

> AFAIK edge triggered interrupts do not get along very well
> with sharing an interrupt line.

So in that case you shouldn't use shared edge triggered interrupts in
the
SoC in the first place, I guess.

-michael

\
 
 \ /
  Last update: 2019-12-05 10:19    [W:0.048 / U:0.920 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site