On Wed, Dec 7, 2016 at 11:31 AM, Viresh Kumar <viresh.ku...@linaro.org> wrote: > This reverts commit ef3caabee9691386e6801ea92150e37277db9c7a. > > The commit was based on the assumption that a platform with voltages > specified with individual OPPs, would have registered a regulator as > well in order to do full DVFS. > > That assumption is broken by the Tegra124 platform. > > For Tegra124, the voltage is not scaled via a direct call to the > regulator subsystem because the DFLL directly controls the I2C interface > that controls the voltage. The DFLL essentially figures out the max > frequency for a given voltage. So to run at a particular frequency, the > DFLL continuously adjusts the voltage in a control loop fashion to get > the desired frequency. > > Following are the logs from: NVIDIA Tegra124 Jetson TK1 > > cpufreq: cpufreq_online: CPU0: Running at unlisted freq: 696000 KHz > cpu cpu0: dev_pm_opp_set_rate: Regulator not registered with OPP core > cpufreq: __target_index: Failed to change cpu frequency: -22 > ------------[ cut here ]------------ > kernel BUG at drivers/cpufreq/cpufreq.c:1235! > > Fix these by reverting the offending commit. > > Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org> > > --- > Rafael, you can simply drop the patch if that is easier for you.
Done. Thanks, Rafael
