Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[linux-2.6-omap-h63xx.git] / arch / i386 / kernel / time_hpet.c

diff --git a/arch/i386/kernel/time_hpet.c b/arch/i386/kernel/time_hpet.c
index 658c0629ba6aa9e9d2062cd9111ba14a3b888e0c..14a1376fedd1423710f64893ec5e6894a26507ff 100644 (file)
--- a/arch/i386/kernel/time_hpet.c
+++ b/arch/i386/kernel/time_hpet.c
@@ -18,7 +18,6 @@
 #include <asm/apic.h>
 
 #include <linux/timex.h>
-#include <linux/config.h>
 
 #include <asm/hpet.h>
 #include <linux/hpet.h>
@@ -259,8 +258,6 @@ __setup("hpet=", hpet_setup);
 #include <linux/mc146818rtc.h>
 #include <linux/rtc.h>
 
-extern irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
-
 #define DEFAULT_RTC_INT_FREQ   64
 #define RTC_NUM_INTS           1
 
@@ -275,6 +272,7 @@ 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 +304,12 @@ 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 +319,12 @@ 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 +332,10 @@ 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;
 }
 
 /*