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author | Vadim Bendebury <vbendeb@chromium.org> | 2014-07-10 12:49:46 -0700 |
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committer | Marc Jones <marc.jones@se-eng.com> | 2015-01-12 05:55:45 +0100 |
commit | 1c5cdad09efa7d6bd196ad852dbeb5f740ac66e3 (patch) | |
tree | b122e84cdc7be7918cc41021913a3ce0d30691cc /util/lint | |
parent | ab699846018d5a697d9d2c3f88031d932cc5fe58 (diff) |
libpayload: improve us timer accuracy
In cases where timer clock frequency is not an integer number of
megahertz, the calculations in timer_us() lack accuracy.
This patch modifies calculations to reduce the error. The maximum
interval this calculation would support decreases, but it still is in
excess of 1844674 seconds for a timer clocked by 10 MHz, which is more
than enough.
BUG=none
TEST=manual
. verified timer accuracy using a depthcharge CLI command
Original-Change-Id: Iffb323db10e74b0ce3b4d59a56983bfee12e6805
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/207358
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit e1abf87d438de1a04714482d5b610671e8cc0663)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ia892726187ab040dd235f493c92856c15951cc06
Reviewed-on: http://review.coreboot.org/8128
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'util/lint')
0 files changed, 0 insertions, 0 deletions