linux-kernel - RE: [PATCH] Force enable HPET on (some?) ICH9 boards

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Date:	Mon, 28 Jan 2008 17:12:33 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	"Alistair John Strachan" <alistair@...zero.co.uk>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] Force enable HPET on (some?) ICH9 boards


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.pallipadi@...el.com> 


>-----Original Message-----
>From: Alistair John Strachan [mailto:alistair@...zero.co.uk] 
>Sent: Sunday, January 27, 2008 6:33 AM
>To: Pallipadi, Venkatesh
>Cc: Ingo Molnar; Linux Kernel Mailing List; Alistair John Strachan
>Subject: [PATCH] Force enable HPET on (some?) ICH9 boards
>
>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 <alistair@...zero.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.
>
--
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