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* tclib: Fix compile warningsDavid Brownell2008-03-131-7/+4
| | | | | | | Does that have something analagous to this "remove warnings" patch? Seems setup_clkevents() no longer needs a t0_clk parameter either... Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
* atmel_tc clocksource/clockevent codeDavid Brownell2008-03-042-0/+306
| | | | | | | | | | | | | | | | | | | | | | | | | | | Clocksource and clockevent device based on the Atmel TC blocks. The clockevent device handles both periodic and oneshot modes, so this enables NO_HZ and high res timers on some platforms that previously couldn't use those mechanisms. This works on both AVR32 and AT91 chips, given relevant patches for tclib support (always) and clockevents (or else this will only look like a higher precision clocksource). It's an updated and modularized version of an AT91-only patch that has circulated for some time now. Changes relative to the original patch: * Update to use new tclib API * Replace open-coded do-while loop using goto with a real do-while loop * Minor irq handler optimization: Load register base address from dev_id instead of a global variable. * Aggressively turn off clocks when the clockevent isn't being used * Include the clockevent code on AT91RM9200 as well. The rating is lower than the System Timer, so the clock will usually stay off. * Don't assume that the number of clocks is always equal to the number of irqs. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
* x86_64: fix typo in acpi_pm.cAlessio Igor Bogani2007-07-211-1/+1
| | | | | | | | Signed-off-by: Alessio Igor Bogani <abogani@texware.it> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* PCI: Change all drivers to use pci_device->revisionAuke Kok2007-07-111-4/+1
| | | | | | | | | | | | | | | | | | | | Instead of all drivers reading pci config space to get the revision ID, they can now use the pci_device->revision member. This exposes some issues where drivers where reading a word or a dword for the revision number, and adding useless error-handling around the read. Some drivers even just read it for no purpose of all. In devices where the revision ID is being copied over and used in what appears to be the equivalent of hotpath, I have left the copy code and the cached copy as not to influence the driver's performance. Compile tested with make all{yes,mod}config on x86_64 and i386. Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* ACPI: correct pathname in commentDaniel Walker2007-04-251-1/+1
| | | | | | Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
* [PATCH] correct slow acpi_pm ratingjohn stultz2007-03-271-1/+1
| | | | | | | | | | | | | | | | | | | On Bob's machine clocksource is selecting PIT over the ACPI PM timer, because he has the PIIX4 bug. That bug drops the ACPI PM timers rating to the same as the PIT, so that's why you're getting the PIT. Realistically, the PIT is much slower then even the triple read ACPI PM, so the de-ranking code is probably dropping it too far. So don't drop ACPI PM quite so low if we see the PIIX4 bug. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Bob Tracy <rct@gherkin.frus.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] clocksource init adjustments (fix bug #7426)john stultz2007-03-052-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch resolves the issue found here: http://bugme.osdl.org/show_bug.cgi?id=7426 The basic summary is: Currently we register most of i386/x86_64 clocksources at module_init time. Then we enable clocksource selection at late_initcall time. This causes some problems for drivers that use gettimeofday for init calibration routines (specifically the es1968 driver in this case), where durring module_init, the only clocksource available is the low-res jiffies clocksource. This may cause slight calibration errors, due to the small sampling time used. It should be noted that drivers that require fine grained time may not function on architectures that do not have better then jiffies resolution timekeeping (there are a few). However, this does not discount the reasonable need for such fine-grained timekeeping at init time. Thus the solution here is to register clocksources earlier (ideally when the hardware is being initialized), and then we enable clocksource selection at fs_initcall (before device_initcall). This patch should probably get some testing time in -mm, since clocksource selection is one of the most important issues for correct timekeeping, and I've only been able to test this on a few of my own boxes. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] Allow early access to the power management timerThomas Gleixner2007-02-161-8/+9
| | | | | | | | | | | | | | | | | | | | | | | Allow early access to the power management timer by exposing the verified read function and providing a helper function which checks the pmtmr_ioport variable and returns either the pm timer readout or 0 in case the pm timer is not available. Create a new header file and replace also the ifdef'ed extern definition in arch/i386/kernel/acpi/boot.c This is a preperatory patch for the rework of the local apic timer calibration. No functional changes. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] clocksource: replace is_continuous by a flag fieldThomas Gleixner2007-02-163-3/+4
| | | | | | | | | | | | | Using a flag filed allows to encode more than one information into a variable. Preparatory patch for the generic clocksource verification. [mingo@elte.hu: convert vmitime.c to the new clocksource flag] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] clocksource: small cleanupDaniel Walker2006-12-101-3/+3
| | | | | | | | | | | | Mostly changing alignment. Just some general cleanup. [akpm@osdl.org: build fix] Signed-off-by: Daniel Walker <dwalker@mvista.com> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] time: re-add verify_pmtmr_ratejohn stultz2006-12-081-0/+36
| | | | | | | | | | | | | | | | | | | | | | | This patch re-adds the verify_pmtmr_rate functionality from 2.6.17 that I dropped 2.6.18. This resolves problems seen on older K6 ASUS boards where the ACPI PM timer runs too fast. See: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=211902 http://bugme.osdl.org/show_bug.cgi?id=2375 Thanks to Ian Campbell for re-reporting this and testing the fix! Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Andi Kleen <ak@suse.de> Cc: Ian Campbell <ijc@hellion.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] clocksource: acpi_pm: add another greylist chipsetDaniel Walker2006-10-211-2/+4
| | | | | | | | | | | | | | I have an acpi_pm that goes backwards, but it's not intel. I tested the verified read and my acpi_pm started to function properly. So I added it to the greylist. I'm assuming that's the right spot. I also added an unlikely() to the while, cause it seems appropriate. Signed-off-by: Daniel Walker <dwalker@mvista.com> Acked-by: John Stultz <johnstul@us.ibm.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] scx200_hrt: fix precedence bug manifesting as 27x clock in 1 MHz modeJim Cromie2006-10-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | Fix paren-placement / precedence bug breaking initialization for 1 MHz clock mode. Also fix comment spelling error, and fence-post (off-by-one) error on symbol used in request_region. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=7242 Thanks alexander.krause@erazor-zone.de, dzpost@dedekind.net, for the reports and patch test, and phelps@mantara.com for the independent patch and verification. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Cc: <alexander.krause@erazor-zone.de> Cc: <dzpost@dedekind.net> Cc: <phelps@mantara.com> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] GTOD: add scx200 HRT clocksourceJim Cromie2006-06-262-2/+104
| | | | | | | | | | Add a GTOD clocksource driver based on the Geode SCx200's Hi-Res Timer. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] generic-time: add macro to simplify/hide mask constantsJim Cromie2006-06-262-3/+3
| | | | | | | | | | | Add a CLOCKSOURCE_MASK macro to simplify initializing the mask for a struct clocksource, and use it to replace literal mask constants in the various clocksource drivers. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Acked-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] make pmtmr_ioport __read_mostlyAndreas Mohr2006-06-261-2/+2
| | | | | | | | | | - written on init only, accessed for every timer read --> __read_mostly - fix broken sentence Signed-off-by: Andreas Mohr <andi@lisas.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] time: rename clocksource functionsjohn stultz2006-06-262-2/+2
| | | | | | | | | | | As suggested by Roman Zippel, change clocksource functions to use clocksource_xyz rather then xyz_clocksource to avoid polluting the namespace. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Time: i386 Clocksource Driversjohn stultz2006-06-263-0/+298
Implement the time sources for i386 (acpi_pm, cyclone, hpet, pit, and tsc). With this patch, the conversion of the i386 arch to the generic timekeeping code should be complete. The patch should be fairly straight forward, only adding the new clocksources. [hirofumi@mail.parknet.co.jp: acpi_pm cleanup] Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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