lkml.org 
[lkml]   [2013]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/5] clocksource: Add Allwinner SoCs HS timers driver
On 10/10/13 12:13, Maxime Ripard wrote:
> On Wed, Sep 25, 2013 at 04:16:14PM -0700, Stephen Boyd wrote:
>> On 09/25/13 07:03, Maxime Ripard wrote:
>>> + sun5i_clockevent.cpumask = cpumask_of(0);
>> Can this timer interrupt any CPU or is it hardwired to CPU0? If the
>> interrupt can go to any CPU this should be cpu_possible_mask instead.
> I've changed the few other things you spotted, but this one making the
> timer unusable.
>
> I think what happens here is that we have the A31 I've tested these
> patches on is a quad-core SoC. As such, the device tree has 4 CPUs
> declared. However, we don't have any SMP support for it now. So we end
> up having 4 cpus set as possible, and only one online (the boot cpu),
> which isn't working.

Can you explain more why it isn't working? Is the timer being rejected
in favor of another timer?

>
> Would using cpu_online_mask work in our case?

It may work but it's probably hiding a problem with CONFIG_SMP=y

--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation



\
 
 \ /
  Last update: 2013-10-11 01:21    [W:0.916 / U:0.592 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site