Re: [PATCH 1/3] ia64: convert to use clocksource code

[Peter Keilty <peter.keilty@hp.com>]

john stultz wrote:

> On Thu, 2007-04-26 at 16:26 -0400, Peter Keilty wrote:
>  
>
> > From: Peter Keilty <peter.keilty@hp.com>
> >
> > Initial ia64 conversion to the generic timekeeping/clocksource code.
> >
> > Signed-off-by: Peter Keilty <peter.keilty@hp.com>
> > Signed-off-by: John Stultz <johnstul@us.ibm.com>
> >    
>
> Peter,
> 	Thanks so much for pushing this on! I suspect this patch needs to be
> updated a touch, as I'm not sure if it still compiles in light of recent
> changes...
>
>  
John,

You are correct, you need patch 3/3 for it to compile and run.
I did a patch to the orginal patch, thought that was correct thing to do.
But I can make a new patch 1 from the orginal of ours and my #3.
I would also make an update to the #2 patch from #3 for ntp correct change.
That would be just 2 patches then, the enable_ia64 and remove_interpolater.
What do you think?

>  
>
> > diff --git a/arch/ia64/kernel/cyclone.c b/arch/ia64/kernel/cyclone.c
> > index e00b215..280383b 100644
> > --- a/arch/ia64/kernel/cyclone.c
> > +++ b/arch/ia64/kernel/cyclone.c
> > @@ -3,6 +3,7 @@ #include <linux/smp.h>
> > #include <linux/time.h>
> > #include <linux/errno.h>
> > #include <linux/timex.h>
> > +#include <linux/clocksource.h>
> > #include <asm/io.h>
> >
> > /* IBM Summit (EXA) Cyclone counter code*/
> > @@ -18,13 +19,21 @@ void __init cyclone_setup(void)
> > 	use_cyclone = 1;
> > }
> >
> > +static void __iomem *cyclone_mc_ptr;
> >
> > -struct time_interpolator cyclone_interpolator = {
> > -	.source =	TIME_SOURCE_MMIO64,
> > -	.shift =	16,
> > -	.frequency =	CYCLONE_TIMER_FREQ,
> > -	.drift =	-100,
> > -	.mask =		(1LL << 40) - 1
> > +static cycle_t read_cyclone(void)
> > +{
> > +	return (cycle_t)readq((void __iomem *)cyclone_mc_ptr);
> > +}
> > +
> > +static struct clocksource clocksource_cyclone = {
> > +        .name           = "cyclone",
> > +        .rating         = 300,
> > +        .read           = read_cyclone,
> > +        .mask           = (1LL << 40) - 1,
> >    
>
> Daniel Walker pointed out to me on IRC that CLOCKSOURCE_MASK() should
> probably be used here.
>
>  
>
> > +        .mult           = 0, /*to be caluclated*/
> > +        .shift          = 16,
> > +        .is_continuous  = 1,
> >    
>
> .is_continuous no longer exists. 
>
> You want to use:
> .flags = CLOCK_SOURCE_IS_CONTINUOUS 
>
> This holds for all the clocksources introduced.
>
>
> thanks
> -john
>
>
>  
-
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