TDA 2xx power distribute level in SOC modules

Hi sir，

  We are under development on TDA platform. I want to know that:

1)the  power distribute level in SOC modules,such as CPU\GPU\DSP\EVE\IPU. 

2) how to enable frequency scaling? I see from the shell that:

    cat /sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies/scaling_available_frequencies  ----->1000000

    cat /sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies/scaling_cur_freq         ----->1000000

   cat /sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies/scaling_min_freq         ----->1000000

   cat /sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies/scaling_max_freq        ----->1000000

   cat /sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies/scaling_available_governors  --->conservative userspace powersave ondemand performance

   cat /sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies/scaling_governor        --->ondemand

     So from above ,we can see that there is only one frequency to adjust. Why? 

Thank you!