Stephen Boyd sent few patches today around a new cpufreq driver for Qualcomm's Krait SoC: https://lkml.org/lkml/2014/6/24/918.
Krait couldn't use existing cpufreq-cpu0 driver as it doesn't have support for SoC's with multiple clusters or SoC's which don't share clock line for all CPUs. And I thought about trying updating cpu0 driver to see if we can get rid of this limitation easily and use it for Krait as well.
It took me longer than I thought, around 4 hours to get this working on my dual A15 exynos board.
First patch adds some space for driver specific data in 'struct cpufreq_policy' and second one updates cpufreq-cpu0..
@Stephen: Can you please test this on Krait and see if it works?
Pushed here: Rebased over rc2: git://git.linaro.org/people/viresh.kumar/linux.git cpufreq/cpu0-krait
For guys looking to test on exynos, rebased over linux-next + some patches from Thomas Abraham to use cpufreq-cpu0 for exynos: git://git.linaro.org/people/viresh.kumar/linux.git cpufreq/cpu0-exynos
In case this is acceptable and bug free, next step would be to get cpufreq-cpu0 renamed a bit as its not about CPU0 anymore. Any suggestions on that would be great :), cpufreq_generic.c ?
Thanks.
Viresh Kumar (2): cpufreq: Add support for per-policy driver data cpufreq: cpu0: Extend support beyond CPU0
.../devicetree/bindings/cpufreq/cpufreq-cpu0.txt | 8 +- drivers/cpufreq/Kconfig | 5 +- drivers/cpufreq/cpufreq-cpu0.c | 280 +++++++++++++-------- include/linux/cpufreq.h | 3 + 4 files changed, 193 insertions(+), 103 deletions(-)