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由 Soren Brinkmann 提交于
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: NSoren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org> Acked-by: NMichal Simek <michal.simek@xilinx.com>
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