etc/pmconfig:
#Power management configuration file
disable_core_off 0
enable_off_mode 1
sleep_while_idle 1
sr_vdd1_autocomp 1
sr_vdd2_autocomp 1
clocks_off_while_idle 1
voltage_off_while_idle 1
scaling_governor ondemand
scaling_max_freq 1000000
scaling_min_freq 300000
sleep_ind 1

I still can't help but think there's more involved than changing the settings in this file, even with open mode. But it's a guess.
scaling_max_freq 1000000 obviously = 1ghz

Edit: ok I see one tiny, tiny piece of the puzzle as I now see.