diff options
| author | Venki Pallipadi <venkatesh.pallipadi@intel.com> | 2007-10-12 23:04:23 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@inhelltoy.tec.linutronix.de> | 2007-10-12 23:04:23 +0200 |
| commit | 59c69f2a51b41e9886b85f61c04e8d0d2a35f37b (patch) | |
| tree | 3512523870b3a34a976777c2cb332bd29d7aab59 | |
| parent | d54bd57d6580250e6551261f3b15c45a9d90c77b (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>
| -rw-r--r-- | arch/x86/kernel/hpet.c | 27 | ||||
| -rw-r--r-- | include/asm-x86/hpet.h | 1 |
2 files changed, 26 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); diff --git a/include/asm-x86/hpet.h b/include/asm-x86/hpet.h index 7c933242365..47de4b8cdda 100644 --- a/include/asm-x86/hpet.h +++ b/include/asm-x86/hpet.h @@ -63,6 +63,7 @@ /* hpet memory map physical address */ extern unsigned long hpet_address; +extern unsigned long force_hpet_address; extern int is_hpet_enabled(void); extern int hpet_enable(void); extern unsigned long hpet_readl(unsigned long a); |