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linux/arch/i386
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Rafal Bilski 52a2638bff Longhaul: add auto enabled "revid_errata" option 
VIA C3 Ezra-T has RevisionID equal to 1, but it needs RevisionKey to be 0
or CPU will ignore new frequency and will continue to work at old
frequency.  New "revid_errata" option will force RevisionKey to be set to
0, whatever RevisionID is.

Additionaly "Longhaul" will not silently ignore unsuccessful transition.
It will try to check if "revid_errata" or "disable_acpi_c3" options need to
be enabled for this processor/system.

Same for Longhaul ver.  2 support.  It will be disabled if none of above
options will work.

 Best case scenario (with patch apllied and v2 enabled):
 longhaul: VIA C3 'Ezra' [C5C] CPU detected.  Longhaul v2 supported.
 longhaul: Using northbridge support.
 longhaul: VRM 8.5
 longhaul: Max VID=1.350  Min VID=1.050, 13 possible voltage scales
 longhaul: f: 300000 kHz, index: 0, vid: 1050 mV
 [...]
 longhaul: Voltage scaling enabled.
 Worst case scenario:
 longhaul: VIA C3 'Ezra-T' [C5M] CPU detected.  Powersaver supported.
 longhaul: Using northbridge support.
 longhaul: Using ACPI support.
 longhaul: VRM 8.5
 longhaul: Claims to support voltage scaling but min & max are both 1.250. Voltage scaling disabled
 longhaul: Failed to set requested frequency!
 longhaul: Enabling "Ignore Revision ID" option.
 longhaul: Failed to set requested frequency!
 longhaul: Disabling ACPI C3 support.
 longhaul: Disabling "Ignore Revision ID" option.
 longhaul: Failed to set requested frequency!
 longhaul: Enabling "Ignore Revision ID" option.

[akpm@linux-foundation.org: coding-style cleanups]
Signed-off-by: Rafal Bilski <rafalbilski@interia.pl>
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-07 16:28:43 -07:00
..
boot [x86 setup] Correct the SMAP check for INT 0x15, AX=0xe820 2007-09-28 10:12:44 -07:00
crypto
kernel Longhaul: add auto enabled "revid_errata" option 2007-10-07 16:28:43 -07:00
lib i386: Move all simple string operations out of line 2007-07-21 18:37:08 -07:00
mach-default Add IRQF_IRQPOLL flag on i386 2007-05-08 11:15:22 -07:00
mach-es7000 i386: es7000 build breakage fix 2007-07-06 10:23:43 -07:00
mach-generic i386: Fix leak of ../kernel from top level 2007-09-12 09:28:06 -07:00
mach-visws PCI: i386: traps, change VENDOR to DEVICE 2007-07-11 16:02:10 -07:00
mach-voyager i386: Fix leak of ../kernel from top level 2007-09-12 09:28:06 -07:00
math-emu potential parse error in ifdef part 3 2007-06-08 17:23:33 -07:00
mm revert "highmem: catch illegal nesting" 2007-09-11 17:21:27 -07:00
oprofile x86: fix oprofile double free 2007-06-01 08:18:28 -07:00
pci PCI: irq and pci_ids patch for Intel Tolapai 2007-09-11 04:22:17 -07:00
power Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
video fbcon: allow fbcon to use the primary display driver 2007-07-17 10:23:11 -07:00
xen xen: execve's error paths don't pin the mm before unpinning 2007-09-26 09:27:14 -07:00
defconfig i386: Update defconfig 2007-07-21 18:37:07 -07:00
Kconfig i386: Mark NUMA support experimental 2007-08-21 10:06:44 -07:00
Kconfig.cpu i386: Allow KVM on i386 nonpae 2007-07-19 14:37:05 -07:00
Kconfig.debug Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
Makefile x86_64: Check for .cfi_rel_offset in CFI probe 2007-08-18 10:25:25 -07:00
Makefile.cpu