From: "Udo A. Steinberg" <us15@os.inf.tu-dresden.de>

ICH3 and ICH4 have undocumented HPET capabilities.  This patch enables HPET
for platforms based around these ICHs.  

Tested on various ICH3 and ICH4 platforms.

Because HPET is not officially documented for ICH3/4 and may not have been
validated by chipset folks, we're on thin ice here. I'd recommend testing 
this patch in -hrt or -mm for a while and wait for success/failure reports
before feeding it upstream.

Signed-off-by: Udo A. Steinberg <us15@os.inf.tu-dresden.de>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
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>
---

 arch/i386/kernel/quirks.c |    8 ++++++++
 1 files changed, 8 insertions(+)

diff -puN arch/i386/kernel/quirks.c~hpet-force-enable-on-ich34 arch/i386/kernel/quirks.c
--- a/arch/i386/kernel/quirks.c~hpet-force-enable-on-ich34
+++ a/arch/i386/kernel/quirks.c
@@ -232,6 +232,14 @@ static void old_ich_force_enable_hpet(st
 	printk(KERN_DEBUG "Failed to force enable HPET\n");
 }
 
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
+                         old_ich_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
+                         old_ich_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
+                         old_ich_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12,
+                         old_ich_force_enable_hpet);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
                          old_ich_force_enable_hpet);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
_