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authorVenki Pallipadi <venkatesh.pallipadi@intel.com>2007-10-12 23:04:23 +0200
committerThomas Gleixner <tglx@inhelltoy.tec.linutronix.de>2007-10-12 23:04:23 +0200
commit59c69f2a51b41e9886b85f61c04e8d0d2a35f37b (patch)
tree3512523870b3a34a976777c2cb332bd29d7aab59 /arch/x86/kernel/hpet.c
parentd54bd57d6580250e6551261f3b15c45a9d90c77b (diff)
x86: HPET try to activate force detected hpet
Enable HPET later during boot, after the force detect in PCI quirks. Also add a call to repeat the force enabling at resume time. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Andi Kleen <ak@suse.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/hpet.c')
-rw-r--r--arch/x86/kernel/hpet.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index ce3bcc4334d..a6c68915d2a 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -164,6 +164,7 @@ static struct clock_event_device hpet_clockevent = {
.set_next_event = hpet_legacy_next_event,
.shift = 32,
.irq = 0,
+ .rating = 50,
};
static void hpet_start_counter(void)
@@ -178,6 +179,17 @@ static void hpet_start_counter(void)
hpet_writel(cfg, HPET_CFG);
}
+static void hpet_resume_device(void)
+{
+ ich_force_hpet_resume();
+}
+
+static void hpet_restart_counter(void)
+{
+ hpet_resume_device();
+ hpet_start_counter();
+}
+
static void hpet_enable_legacy_int(void)
{
unsigned long cfg = hpet_readl(HPET_CFG);
@@ -299,7 +311,7 @@ static struct clocksource clocksource_hpet = {
.mask = HPET_MASK,
.shift = HPET_SHIFT,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
- .resume = hpet_start_counter,
+ .resume = hpet_restart_counter,
#ifdef CONFIG_X86_64
.vread = vread_hpet,
#endif
@@ -412,10 +424,21 @@ out_nohpet:
*/
static __init int hpet_late_init(void)
{
- if (!is_hpet_capable())
+ if (boot_hpet_disable)
return -ENODEV;
+ if (!hpet_address) {
+ if (!force_hpet_address)
+ return -ENODEV;
+
+ hpet_address = force_hpet_address;
+ hpet_enable();
+ if (!hpet_virt_address)
+ return -ENODEV;
+ }
+
hpet_reserve_platform_timers(hpet_readl(HPET_ID));
+
return 0;
}
fs_initcall(hpet_late_init);