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[ARM] realview: fix broadcast tick support

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Having discussed broadcast tick support with Thomas Glexiner, the
broadcast tick devices should be registered with a higher rating
than the global tick device, and it should have the ONESHOT and
PERIODIC feature flags set.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Thomas Glexiner <tglx@linutronix.de>
This commit is contained in:
Russell King 2009-05-17 17:00:47 +01:00 committed by Russell King
parent 78d236c2b3
commit ee348d5a1d
3 changed files with 6 additions and 14 deletions
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8
arch/arm/mach-realview/core.c
View File

@ -750,14 +750,6 @@ void __init realview_timer_init(unsigned int timer_irq)
{
u32 val;
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
/*
* The dummy clock device has to be registered before the main device
* so that the latter will broadcast the clock events
*/
local_timer_setup();
#endif
/*
* set clock frequency:
* REALVIEW_REFCLK is 32KHz

6
arch/arm/mach-realview/localtimer.c
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@ -189,8 +189,10 @@ void __cpuinit local_timer_setup(void)
struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
clk->name = "dummy_timer";
clk->features = CLOCK_EVT_FEAT_DUMMY;
clk->rating = 200;
clk->features = CLOCK_EVT_FEAT_ONESHOT |
CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_DUMMY;
clk->rating = 400;
clk->mult = 1;
clk->set_mode = dummy_timer_set_mode;
clk->broadcast = smp_timer_broadcast;

6
arch/arm/mach-realview/platsmp.c
View File

@ -217,11 +217,9 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
if (max_cpus > ncores)
max_cpus = ncores;
#ifdef CONFIG_LOCAL_TIMERS
#if defined(CONFIG_LOCAL_TIMERS) || defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
/*
* Enable the local timer for primary CPU. If the device is
* dummy (!CONFIG_LOCAL_TIMERS), it was already registers in
* realview_timer_init
* Enable the local timer or broadcast device for the boot CPU.
*/
local_timer_setup();
#endif