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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-11-04 21:39:31 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-11-04 21:39:31 -0500 |
| commit | c2cc87ca9561ddfe744d446789cc10f507e87db9 (patch) | |
| tree | d505fc0110eb1a3d8750ba2f67648c131f0d9aca /arch/i386/kernel/time_hpet.c | |
| parent | ce1eeb95fc4eb25109c00bea3e83a87eeff6b07d (diff) | |
| parent | 7015faa7df829876a0f931cd18aa6d7c24a1b581 (diff) | |
| download | linux-c2cc87ca9561ddfe744d446789cc10f507e87db9.tar.gz linux-c2cc87ca9561ddfe744d446789cc10f507e87db9.tar.bz2 linux-c2cc87ca9561ddfe744d446789cc10f507e87db9.zip | |
Merge branch 'master'
Diffstat (limited to 'arch/i386/kernel/time_hpet.c')
| -rw-r--r-- | arch/i386/kernel/time_hpet.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/i386/kernel/time_hpet.c b/arch/i386/kernel/time_hpet.c index 658c0629ba6a..9caeaa315cd7 100644 --- a/arch/i386/kernel/time_hpet.c +++ b/arch/i386/kernel/time_hpet.c @@ -275,6 +275,7 @@ static unsigned long PIE_freq = DEFAULT_RTC_INT_FREQ; static unsigned long PIE_count; static unsigned long hpet_rtc_int_freq; /* RTC interrupt frequency */ +static unsigned int hpet_t1_cmp; /* cached comparator register */ /* * Timer 1 for RTC, we do not use periodic interrupt feature, @@ -306,10 +307,12 @@ int hpet_rtc_timer_init(void) cnt = hpet_readl(HPET_COUNTER); cnt += ((hpet_tick*HZ)/hpet_rtc_int_freq); hpet_writel(cnt, HPET_T1_CMP); + hpet_t1_cmp = cnt; local_irq_restore(flags); cfg = hpet_readl(HPET_T1_CFG); - cfg |= HPET_TN_ENABLE | HPET_TN_SETVAL | HPET_TN_32BIT; + cfg &= ~HPET_TN_PERIODIC; + cfg |= HPET_TN_ENABLE | HPET_TN_32BIT; hpet_writel(cfg, HPET_T1_CFG); return 1; @@ -319,8 +322,12 @@ static void hpet_rtc_timer_reinit(void) { unsigned int cfg, cnt; - if (!(PIE_on | AIE_on | UIE_on)) + if (unlikely(!(PIE_on | AIE_on | UIE_on))) { + cfg = hpet_readl(HPET_T1_CFG); + cfg &= ~HPET_TN_ENABLE; + hpet_writel(cfg, HPET_T1_CFG); return; + } if (PIE_on && (PIE_freq > DEFAULT_RTC_INT_FREQ)) hpet_rtc_int_freq = PIE_freq; @@ -328,15 +335,10 @@ static void hpet_rtc_timer_reinit(void) hpet_rtc_int_freq = DEFAULT_RTC_INT_FREQ; /* It is more accurate to use the comparator value than current count.*/ - cnt = hpet_readl(HPET_T1_CMP); + cnt = hpet_t1_cmp; cnt += hpet_tick*HZ/hpet_rtc_int_freq; hpet_writel(cnt, HPET_T1_CMP); - - cfg = hpet_readl(HPET_T1_CFG); - cfg |= HPET_TN_ENABLE | HPET_TN_SETVAL | HPET_TN_32BIT; - hpet_writel(cfg, HPET_T1_CFG); - - return; + hpet_t1_cmp = cnt; } /* |