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| author | John Stultz <johnstul@us.ibm.com> | 2010-07-13 17:56:27 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-07-27 12:40:55 +0200 |
| commit | f12a15be63d1de9a35971f35f06b73088fa25c3a (patch) | |
| tree | 444084a06e776f005d52d3214fb35b91b3a8345d | |
| parent | 0fb86b06298b6cd3205cac2e68a499f269282dac (diff) | |
| download | linux-f12a15be63d1de9a35971f35f06b73088fa25c3a.tar.gz linux-f12a15be63d1de9a35971f35f06b73088fa25c3a.tar.xz | |
x86: Convert common clocksources to use clocksource_register_hz/khz
This converts the most common of the x86 clocksources over to use
clocksource_register_hz/khz.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <1279068988-21864-11-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/kernel/hpet.c | 13 | ||||
| -rw-r--r-- | arch/x86/kernel/tsc.c | 5 | ||||
| -rw-r--r-- | drivers/clocksource/acpi_pm.c | 9 |
3 files changed, 12 insertions, 15 deletions
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index ba390d731175..33dbcc4ec5ff 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -16,7 +16,6 @@ #include <asm/hpet.h> #define HPET_MASK CLOCKSOURCE_MASK(32) -#define HPET_SHIFT 22 /* FSEC = 10^-15 NSEC = 10^-9 */ @@ -787,7 +786,6 @@ static struct clocksource clocksource_hpet = { .rating = 250, .read = read_hpet, .mask = HPET_MASK, - .shift = HPET_SHIFT, .flags = CLOCK_SOURCE_IS_CONTINUOUS, .resume = hpet_resume_counter, #ifdef CONFIG_X86_64 @@ -798,6 +796,7 @@ static struct clocksource clocksource_hpet = { static int hpet_clocksource_register(void) { u64 start, now; + u64 hpet_freq; cycle_t t1; /* Start the counter */ @@ -832,9 +831,15 @@ static int hpet_clocksource_register(void) * mult = (hpet_period * 2^shift)/10^6 * mult = (hpet_period << shift)/FSEC_PER_NSEC */ - clocksource_hpet.mult = div_sc(hpet_period, FSEC_PER_NSEC, HPET_SHIFT); - clocksource_register(&clocksource_hpet); + /* Need to convert hpet_period (fsec/cyc) to cyc/sec: + * + * cyc/sec = FSEC_PER_SEC/hpet_period(fsec/cyc) + * cyc/sec = (FSEC_PER_NSEC * NSEC_PER_SEC)/hpet_period + */ + hpet_freq = FSEC_PER_NSEC * NSEC_PER_SEC; + do_div(hpet_freq, hpet_period); + clocksource_register_hz(&clocksource_hpet, (u32)hpet_freq); return 0; } diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 9faf91ae1841..ce8e50239332 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -751,7 +751,6 @@ static struct clocksource clocksource_tsc = { .read = read_tsc, .resume = resume_tsc, .mask = CLOCKSOURCE_MASK(64), - .shift = 22, .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_MUST_VERIFY, #ifdef CONFIG_X86_64 @@ -845,8 +844,6 @@ __cpuinit int unsynchronized_tsc(void) static void __init init_tsc_clocksource(void) { - clocksource_tsc.mult = clocksource_khz2mult(tsc_khz, - clocksource_tsc.shift); if (tsc_clocksource_reliable) clocksource_tsc.flags &= ~CLOCK_SOURCE_MUST_VERIFY; /* lower the rating if we already know its unstable: */ @@ -854,7 +851,7 @@ static void __init init_tsc_clocksource(void) clocksource_tsc.rating = 0; clocksource_tsc.flags &= ~CLOCK_SOURCE_IS_CONTINUOUS; } - clocksource_register(&clocksource_tsc); + clocksource_register_khz(&clocksource_tsc, tsc_khz); } #ifdef CONFIG_X86_64 diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c index 72a633a6ec98..cfb0f5278415 100644 --- a/drivers/clocksource/acpi_pm.c +++ b/drivers/clocksource/acpi_pm.c @@ -68,10 +68,7 @@ static struct clocksource clocksource_acpi_pm = { .rating = 200, .read = acpi_pm_read, .mask = (cycle_t)ACPI_PM_MASK, - .mult = 0, /*to be calculated*/ - .shift = 22, .flags = CLOCK_SOURCE_IS_CONTINUOUS, - }; @@ -190,9 +187,6 @@ static int __init init_acpi_pm_clocksource(void) if (!pmtmr_ioport) return -ENODEV; - clocksource_acpi_pm.mult = clocksource_hz2mult(PMTMR_TICKS_PER_SEC, - clocksource_acpi_pm.shift); - /* "verify" this timing source: */ for (j = 0; j < ACPI_PM_MONOTONICITY_CHECKS; j++) { udelay(100 * j); @@ -220,7 +214,8 @@ static int __init init_acpi_pm_clocksource(void) if (verify_pmtmr_rate() != 0) return -ENODEV; - return clocksource_register(&clocksource_acpi_pm); + return clocksource_register_hz(&clocksource_acpi_pm, + PMTMR_TICKS_PER_SEC); } /* We use fs_initcall because we want the PCI fixups to have run |