[PATCH] Force enable HPET on (some?) ICH9 boards

[Alistair John Strachan]

Some consumer ICH9 boards (such as the Abit IP35 Pro) do not provide a BIOS
option for enabling the HPET. The same ICH workaround used for 6,7,8 can be
applied to 9. Here I enable the only PCI id that was visible on my system.

I have confirmed the HPETs work both from userspace and as a clocksource for
the running kernel (2.6.24 here) after applying this patch.

Force enabled HPET at base address 0xfed00000
hpet clockevent registered
hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0
hpet0: 4 64-bit timers, 14318180 Hz

Signed-off-by: Alistair John Strachan <alis...@devzero.co.uk>

---
arch/x86/kernel/quirks.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index fab30e1..150ba29 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -162,6 +162,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
ich_force_enable_hpet);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
ich_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7,
+ ich_force_enable_hpet);


static struct pci_dev *cached_dev;

--
Cheers,
Alistair.

137/1 Warrender Park Road, Edinburgh, UK.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majo...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

[Pallipadi, Venkatesh]

Patch looks good.
If BIOS does not report HPET on more of such systems we may have to add
other chipsets in ICH9 family (ICH9_8, ...) as well.

Acked-by: Venkatesh Pallipadi <venkatesh...@intel.com>

[Alistair John Strachan]

On Tuesday 29 January 2008 01:12:33 Pallipadi, Venkatesh wrote:
> Patch looks good.
> If BIOS does not report HPET on more of such systems we may have to add
> other chipsets in ICH9 family (ICH9_8, ...) as well.
>
> Acked-by: Venkatesh Pallipadi <venkatesh...@intel.com>

Hi Ingo,

Are you going to pick this patch up via the x86 tree, or shall I forward it to
Andrew or trivial@?

Do you want me to re-send with Venki's ack?

[Ingo Molnar]

* Alistair John Strachan <alis...@devzero.co.uk> wrote:

> Are you going to pick this patch up via the x86 tree, or shall I
> forward it to Andrew or trivial@?
>
> Do you want me to re-send with Venki's ack?

no need, we merged your improvement via x86.git and it is now in Linus's
latest tree:

commit dff244af014144e4ac87dfc5b6e450dc8832710e
Author: Alistair John Strachan <alis...@devzero.co.uk>
Date: Wed Jan 30 13:33:39 2008 +0100

x86: force enable HPET on (some?) ICH9 boards

it should first show up in v2.6.25-rc1. Thanks,

Ingo