On 04-06-15, 14:25, yuantian.t...@freescale.com wrote: > From: Tang Yuantian <yuantian.t...@freescale.com> > > Each time the CPU switches its frequency, the clock nodes in > DTS are walked through to find proper clock source. This is > very time-consuming, for example, it is up to 500+ us on T4240. > Besides, switching time varies from clock to clock. > To optimize this, each input clock of CPU is buffered, so that > it can be picked up instantly when needed. > > Since for each CPU each input clock is stored in a pointer > which takes 4 or 8 bytes memory and normally there are several > input clocks per CPU, that will not take much memory as well.
Not sure how it got included in this form in the first place. :) > Signed-off-by: Tang Yuantian <yuantian.t...@freescale.com> > --- > drivers/cpufreq/qoriq-cpufreq.c | 32 +++++++++++++++++++++----------- > 1 file changed, 21 insertions(+), 11 deletions(-) Acked-by: Viresh Kumar <viresh.ku...@linaro.org> -- viresh _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
