diff options
| author | Soren Brinkmann <[email protected]> | 2014-02-19 15:14:42 -0800 |
|---|---|---|
| committer | Daniel Lezcano <[email protected]> | 2014-03-11 23:10:03 +0100 |
| commit | b3e90722f6f53fa457a88146a877e34ea71d25ea (patch) | |
| tree | 9a9bdf62adcb2384b17600b1aefa1e202e2f4b46 /lib/test-string_helpers.c | |
| parent | 5f0ba3b462b2d36b3c28748863747fb1050f40d0 (diff) | |
clocksource/cadence_ttc: Overhaul clocksource frequency adjustment
The currently used method adjusting the clocksource to a changing input
frequency does not work on kernels from 3.11 on.
The new approach is to keep the timer frequency as constant as possible.
I.e.
- due to the TTC's prescaler limitations, allow frequency changes
only if the frequency scales by a power of 2
- adjust the counter's divider on the fly when a frequency change
occurs
This limits cpufreq to scale by certain factors only.
But we may keep the time base somewhat constant, so that sleep() & co
keep working as expected, while supporting cpufreq.
Signed-off-by: Soren Brinkmann <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Acked-by: Michal Simek <[email protected]>
Diffstat (limited to 'lib/test-string_helpers.c')
0 files changed, 0 insertions, 0 deletions