diff options
| author | Peter Neubauer <pneubauer@bluerwhite.org> | 2014-09-12 13:06:13 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-09-16 02:53:35 +0200 |
| commit | 2e151c70dfb0075ff83bec305c52a9da1ba49089 (patch) | |
| tree | 432d86d673c33e7c13c37a8f2f68d7997dde48de /arch/x86/kernel/quirks.c | |
| parent | x86/iosf: Add debugfs support (diff) | |
| download | linux-2e151c70dfb0075ff83bec305c52a9da1ba49089.tar.xz linux-2e151c70dfb0075ff83bec305c52a9da1ba49089.zip | |
x86: HPET force enable for e6xx based systems
As the Soekris net6501 and other e6xx based systems do not have
any ACPI implementation, HPET won't get enabled.
This patch enables HPET on such platforms.
[ 0.430149] pci 0000:00:01.0: Force enabled HPET at 0xfed00000
[ 0.644838] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
Original patch by Peter Neubauer (http://www.mail-archive.com/soekris-tech@lists.soekris.com/msg06462.html)
slightly modified by Conrad Kostecki <ck@conrad-kostecki.de> and massaged
accoring to Thomas Gleixners <tglx@linutronix.de> by me.
Suggested-by: Conrad Kostecki <ck@conrad-kostecki.de>
Signed-off-by: Eric Sesterhenn <eric.sesterhenn@lsexperts.de>
Cc: Peter Neubauer <pneubauer@bluerwhite.org>
Link: http://lkml.kernel.org/r/5412D3A5.2030909@lsexperts.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/quirks.c')
| -rw-r--r-- | arch/x86/kernel/quirks.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c index ff898bbf579d..176a0f99d4da 100644 --- a/arch/x86/kernel/quirks.c +++ b/arch/x86/kernel/quirks.c @@ -498,6 +498,24 @@ void force_hpet_resume(void) } /* + * According to the datasheet e6xx systems have the HPET hardwired to + * 0xfed00000 + */ +static void e6xx_force_enable_hpet(struct pci_dev *dev) +{ + if (hpet_address || force_hpet_address) + return; + + force_hpet_address = 0xFED00000; + force_hpet_resume_type = NONE_FORCE_HPET_RESUME; + dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at " + "0x%lx\n", force_hpet_address); + return; +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E6XX_CU, + e6xx_force_enable_hpet); + +/* * HPET MSI on some boards (ATI SB700/SB800) has side effect on * floppy DMA. Disable HPET MSI on such platforms. * See erratum #27 (Misinterpreted MSI Requests May Result in |