Ahmet YUCE

iMX28 - change the CPU frequency on the fly.

Discussion created by Ahmet YUCE on Jul 1, 2011
Latest reply on Oct 14, 2014 by Matthew Hilder
i.MX28 EVK Linux Reference Manual, Chapter 7 ( CPU Frequency Scaling (CPUFREQ) Driver ) says its possible to change CPU frequency on the fly using the procedures given on this chapter.  cpufreq/stats/time_in_state reports available frequencies as 261818, 360000 and 454736 (all in KHz). If i try to change frequency other than 454.73MHz CPU locks up. Tried on both iMX28 EVK and my custom board, results are the same.  Any one tried to change the CPU frequency on the fly ? Is it working or CPUFREQ driver is broken?  Regards Ahmet