提交 4e7f9df2 编写于 作者: M Michael S. Tsirkin 提交者: Ingo Molnar

hpet: Drop stale URLs

Looks like the HPET spec at intel.com got moved.
It isn't hard to find so drop the link, just mention
the revision assumed.
Suggested-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1455145462-3877-1-git-send-email-mst@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
上级 a82eee74
High Precision Event Timer Driver for Linux
The High Precision Event Timer (HPET) hardware follows a specification
by Intel and Microsoft which can be found at
http://www.intel.com/hardwaredesign/hpetspec_1.pdf
by Intel and Microsoft, revision 1.
Each HPET has one fixed-rate counter (at 10+ MHz, hence "High Precision")
and up to 32 comparators. Normally three or more comparators are provided,
......
......@@ -778,8 +778,8 @@ config HPET_TIMER
HPET is the next generation timer replacing legacy 8254s.
The HPET provides a stable time base on SMP
systems, unlike the TSC, but it is more expensive to access,
as it is off-chip. You can find the HPET spec at
<http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
as it is off-chip. The interface used is documented
in the HPET spec, revision 1.
You can safely choose Y here. However, HPET will only be
activated if the platform and the BIOS support this feature.
......
......@@ -42,7 +42,7 @@
/*
* The High Precision Event Timer driver.
* This driver is closely modelled after the rtc.c driver.
* http://www.intel.com/hardwaredesign/hpetspec_1.pdf
* See HPET spec revision 1.
*/
#define HPET_USER_FREQ (64)
#define HPET_DRIFT (500)
......
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