linux-kernel - Re: [PATCH] clocksource: vf_pit_timer: fix pit_read_sched

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Date:	Tue, 15 Apr 2014 23:53:31 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
cc:	Xiubo Li <Li.Xiubo@...escale.com>, shawn.guo@...aro.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clocksource: vf_pit_timer: fix pit_read_sched_clock

On Tue, 15 Apr 2014, Daniel Lezcano wrote:
> On 04/15/2014 12:48 PM, Xiubo Li wrote:
> > The pit_read_sched_clock mean to getting the current counter value,
> > and the vf pit timer is a down count timer, this should return
> > the counter value or the cycles elapsed.
> > 
> > Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
> > ---
> >   drivers/clocksource/vf_pit_timer.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/clocksource/vf_pit_timer.c
> > b/drivers/clocksource/vf_pit_timer.c
> > index 02821b0..a918bc4 100644
> > --- a/drivers/clocksource/vf_pit_timer.c
> > +++ b/drivers/clocksource/vf_pit_timer.c
> > @@ -54,7 +54,7 @@ static inline void pit_irq_acknowledge(void)
> > 
> >   static u64 pit_read_sched_clock(void)
> >   {
> > -	return __raw_readl(clksrc_base + PITCVAL);
> > +	return ~__raw_readl(clksrc_base + PITCVAL);
> >   }
> > 
> >   static int __init pit_clocksource_init(unsigned long rate)
> > 
> 
> Hi Xiubo,
> 
> thanks for the patch but this has already been fixed [1] and is available in
> the timers/urgent branch.

It's in Linus tree already and tagged for stable.

Thanks,

	tglx
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