diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-10-16 01:27:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:08 -0700 |
| commit | 791a644a8d73a9b95515f074afbb3caa0a9964fa (patch) | |
| tree | 507b52d335416096b71c078d7af037530403633b /arch/um | |
| parent | 31ccc1f524b626abcf5e043ad32b881219223c34 (diff) | |
uml: clocksource support
Add clocksource support.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/kernel/time.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c index 01678487b99..3cb7135e5c4 100644 --- a/arch/um/kernel/time.c +++ b/arch/um/kernel/time.c @@ -97,6 +97,21 @@ static irqreturn_t um_timer(int irq, void *dev) return IRQ_HANDLED; } +static cycle_t itimer_read(void) +{ + return os_nsecs(); +} + +static struct clocksource itimer_clocksource = { + .name = "itimer", + .rating = 300, + .read = itimer_read, + .mask = CLOCKSOURCE_MASK(64), + .mult = 1, + .shift = 0, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + static void __init setup_itimer(void) { int err; @@ -111,6 +126,11 @@ static void __init setup_itimer(void) clockevent_delta2ns(60 * HZ, &itimer_clockevent); itimer_clockevent.min_delta_ns = clockevent_delta2ns(1, &itimer_clockevent); + err = clocksource_register(&itimer_clocksource); + if (err) { + printk(KERN_ERR "clocksource_register returned %d\n", err); + return; + } clockevents_register_device(&itimer_clockevent); } |