[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: Alex Williamson <alex.williamson@hp.com> Cc: "Robert W. Picco" <bob.picco@hp.com> Acked-by: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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1 changed files with 2 additions and 2 deletions
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@ -44,7 +44,7 @@
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/*
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* The High Precision Event Timer driver.
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* This driver is closely modelled after the rtc.c driver.
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* http://www.intel.com/labs/platcomp/hpet/hpetspec.htm
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* http://www.intel.com/hardwaredesign/hpetspec.htm
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*/
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#define HPET_USER_FREQ (64)
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#define HPET_DRIFT (500)
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@ -712,7 +712,7 @@ static void hpet_register_interpolator(struct hpets *hpetp)
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ti->shift = 10;
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ti->addr = &hpetp->hp_hpet->hpet_mc;
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ti->frequency = hpet_time_div(hpets->hp_period);
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ti->drift = ti->frequency * HPET_DRIFT / 1000000;
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ti->drift = HPET_DRIFT;
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ti->mask = -1;
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hpetp->hp_interpolator = ti;
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