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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-20 17:32:09 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-20 17:32:09 (GMT) |
commit | 161f7a7161191ab9c2e97f787829ef8dd2b95771 (patch) | |
tree | 9776d3f963c7f0d247b7fb324eab4811a1302f67 /drivers/clocksource/scx200_hrt.c | |
parent | 2ba68940c893c8f0bfc8573c041254251bb6aeab (diff) | |
parent | a078c6d0e6288fad6d83fb6d5edd91ddb7b6ab33 (diff) | |
download | linux-fsl-qoriq-161f7a7161191ab9c2e97f787829ef8dd2b95771.tar.xz |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer changes for v3.4 from Ingo Molnar
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits)
ntp: Fix integer overflow when setting time
math: Introduce div64_long
cs5535-clockevt: Allow the MFGPT IRQ to be shared
cs5535-clockevt: Don't ignore MFGPT on SMP-capable kernels
x86/time: Eliminate unused irq0_irqs counter
clocksource: scx200_hrt: Fix the build
x86/tsc: Reduce the TSC sync check time for core-siblings
timer: Fix bad idle check on irq entry
nohz: Remove ts->Einidle checks before restarting the tick
nohz: Remove update_ts_time_stat from tick_nohz_start_idle
clockevents: Leave the broadcast device in shutdown mode when not needed
clocksource: Load the ACPI PM clocksource asynchronously
clocksource: scx200_hrt: Convert scx200 to use clocksource_register_hz
clocksource: Get rid of clocksource_calc_mult_shift()
clocksource: dbx500: convert to clocksource_register_hz()
clocksource: scx200_hrt: use pr_<level> instead of printk
time: Move common updates to a function
time: Reorder so the hot data is together
time: Remove most of xtime_lock usage in timekeeping.c
ntp: Add ntp_lock to replace xtime_locking
...
Diffstat (limited to 'drivers/clocksource/scx200_hrt.c')
-rw-r--r-- | drivers/clocksource/scx200_hrt.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/drivers/clocksource/scx200_hrt.c b/drivers/clocksource/scx200_hrt.c index 27f4d96..64f9e82 100644 --- a/drivers/clocksource/scx200_hrt.c +++ b/drivers/clocksource/scx200_hrt.c @@ -49,9 +49,6 @@ static cycle_t read_hrt(struct clocksource *cs) return (cycle_t) inl(scx200_cb_base + SCx200_TIMER_OFFSET); } -#define HRT_SHIFT_1 22 -#define HRT_SHIFT_27 26 - static struct clocksource cs_hrt = { .name = "scx200_hrt", .rating = 250, @@ -63,6 +60,7 @@ static struct clocksource cs_hrt = { static int __init init_hrt_clocksource(void) { + u32 freq; /* Make sure scx200 has initialized the configuration block */ if (!scx200_cb_present()) return -ENODEV; @@ -71,7 +69,7 @@ static int __init init_hrt_clocksource(void) if (!request_region(scx200_cb_base + SCx200_TIMER_OFFSET, SCx200_TIMER_SIZE, "NatSemi SCx200 High-Resolution Timer")) { - printk(KERN_WARNING NAME ": unable to lock timer region\n"); + pr_warn("unable to lock timer region\n"); return -ENODEV; } @@ -79,19 +77,13 @@ static int __init init_hrt_clocksource(void) outb(HR_TMEN | (mhz27 ? HR_TMCLKSEL : 0), scx200_cb_base + SCx200_TMCNFG_OFFSET); - if (mhz27) { - cs_hrt.shift = HRT_SHIFT_27; - cs_hrt.mult = clocksource_hz2mult((HRT_FREQ + ppm) * 27, - cs_hrt.shift); - } else { - cs_hrt.shift = HRT_SHIFT_1; - cs_hrt.mult = clocksource_hz2mult(HRT_FREQ + ppm, - cs_hrt.shift); - } - printk(KERN_INFO "enabling scx200 high-res timer (%s MHz +%d ppm)\n", - mhz27 ? "27":"1", ppm); + freq = (HRT_FREQ + ppm); + if (mhz27) + freq *= 27; + + pr_info("enabling scx200 high-res timer (%s MHz +%d ppm)\n", mhz27 ? "27":"1", ppm); - return clocksource_register(&cs_hrt); + return clocksource_register_hz(&cs_hrt, freq); } module_init(init_hrt_clocksource); |