diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/timer-ep93xx.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/timer-ep93xx.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/arm/mach-ep93xx/timer-ep93xx.c b/arch/arm/mach-ep93xx/timer-ep93xx.c index 9edaa754b689..ac48ac1fd16d 100644 --- a/arch/arm/mach-ep93xx/timer-ep93xx.c +++ b/arch/arm/mach-ep93xx/timer-ep93xx.c @@ -18,15 +18,14 @@ * is free-running, and can't generate interrupts. * * The 508 kHz timers are ideal for use for the timer interrupt, as the - * most common values of HZ divide 508 kHz nicely. We pick one of the 16 - * bit timers (timer 1) since we don't need more than 16 bits of reload - * value as long as HZ >= 8. + * most common values of HZ divide 508 kHz nicely. We pick the 32 bit + * timer (timer 3) to get as long sleep intervals as possible when using + * CONFIG_NO_HZ. * * The higher clock rate of timer 4 makes it a better choice than the - * other timers for use in gettimeoffset(), while the fact that it can't - * generate interrupts means we don't have to worry about not being able - * to use this timer for something else. We also use timer 4 for keeping - * track of lost jiffies. + * other timers for use as clock source and for sched_clock(), providing + * a stable 40 bit time base. + ************************************************************************* */ #define EP93XX_TIMER_REG(x) (EP93XX_TIMER_BASE + (x)) #define EP93XX_TIMER1_LOAD EP93XX_TIMER_REG(0x00) |