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Commit 96803820 authored by Alex Williamson's avatar Alex Williamson Committed by Linus Torvalds
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[PATCH] hpet: fix drift and url 



The HPET driver is using a parts per second drift factor instead of the
standard parts per million drift the time interpolator code expects.  This
patch fixes that problem and updates the URL for the HPET spec.

Signed-off-by: default avatarAlex Williamson <alex.williamson@hp.com>
Cc: "Robert W. Picco" <bob.picco@hp.com>
Acked-by: default avatar"Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 414edcd3

drivers/char/hpet.c

+2 −2
Original line number Diff line number Diff line
@@ -44,7 +44,7 @@ 
/*

 * The High Precision Event Timer driver.

 * This driver is closely modelled after the rtc.c driver.

 * http://www.intel.com/labs/platcomp/hpet/hpetspec.htm

 * http://www.intel.com/hardwaredesign/hpetspec.htm

 */

#define	HPET_USER_FREQ	(64)

#define	HPET_DRIFT	(500)
@@ -712,7 +712,7 @@ static void hpet_register_interpolator(struct hpets *hpetp) 
	ti->shift = 10;

	ti->addr = &hpetp->hp_hpet->hpet_mc;

	ti->frequency = hpet_time_div(hpets->hp_period);

	ti->drift = ti->frequency * HPET_DRIFT / 1000000;

	ti->drift = HPET_DRIFT;

	ti->mask = -1;



	hpetp->hp_interpolator = ti;