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| author | Dimitri Sivanich <sivanich@sgi.com> | 2009-10-14 09:18:48 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-14 18:27:10 +0200 |
| commit | 8c28de4d011f37b2893ecfcec9a985c0e9bd786f (patch) | |
| tree | 6c5e4a3e454c1f63beec662607fe8f24019014f5 /arch | |
| parent | e47938b1faaf9e9041ae842a878901001ce20ea1 (diff) | |
| download | blackbird-op-linux-8c28de4d011f37b2893ecfcec9a985c0e9bd786f.tar.gz blackbird-op-linux-8c28de4d011f37b2893ecfcec9a985c0e9bd786f.zip | |
x86: UV RTC: Add clocksource only boot option
Add clocksource only boot option for UV RTC.
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
LKML-Reference: <20091014141848.GC11048@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/uv_time.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/arch/x86/kernel/uv_time.c b/arch/x86/kernel/uv_time.c index ec14889628e0..c6324ad7c0d9 100644 --- a/arch/x86/kernel/uv_time.c +++ b/arch/x86/kernel/uv_time.c @@ -75,6 +75,7 @@ struct uv_rtc_timer_head { static struct uv_rtc_timer_head **blade_info __read_mostly; static int uv_rtc_enable; +static int uv_rtc_evt_enable; /* * Hardware interface routines @@ -342,6 +343,14 @@ static int __init uv_enable_rtc(char *str) } __setup("uvrtc", uv_enable_rtc); +static int __init uv_enable_evt_rtc(char *str) +{ + uv_rtc_evt_enable = 1; + + return 1; +} +__setup("uvrtcevt", uv_enable_evt_rtc); + static __init void uv_rtc_register_clockevents(struct work_struct *dummy) { struct clock_event_device *ced = &__get_cpu_var(cpu_ced); @@ -358,16 +367,20 @@ static __init int uv_rtc_setup_clock(void) if (!uv_rtc_enable || !is_uv_system() || generic_interrupt_extension) return -ENODEV; - generic_interrupt_extension = uv_rtc_interrupt; - clocksource_uv.mult = clocksource_hz2mult(sn_rtc_cycles_per_second, clocksource_uv.shift); rc = clocksource_register(&clocksource_uv); - if (rc) { - generic_interrupt_extension = NULL; + if (rc) + printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc); + else + printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n", + sn_rtc_cycles_per_second/(unsigned long)1E6); + + if (rc || !uv_rtc_evt_enable) return rc; - } + + generic_interrupt_extension = uv_rtc_interrupt; /* Setup and register clockevents */ rc = uv_rtc_allocate_timers(); |
