Set wi-fi power saving polling interval on Linux, is it possible?

Set wi-fi power saving polling interval on Linux, is it possible?

man iwconfig states:
   power  Used to manipulate power management scheme parameters and mode.
          To set the period between wake ups, enter period `value'. [...]
          Examples :
               iwconfig eth0 power period 2
               iwconfig eth0 power 500m unicast
               iwconfig eth0 power timeout 300u all
               iwconfig eth0 power saving 3
               iwconfig eth0 power off
               iwconfig eth0 power min period 2 power max period 4
It happens that at least with my three wireless cards (a Ralink and two Atheros) none of those commands work, except for iwconfig {interface} power {on|off}.
The rest of them always return:
Error for wireless request "Set Power Management" (8B2C) :
    invalid argument "{whatever I wrote}".
On the other side, iw help only reveals these options:
    dev <devname> set power_save <on|off>
            Set power save state to on or off.

    dev <devname> get power_save <param>
            Retrieve power save state.
Is it possible to set the polling interval for wireless power saving on Linux? In case it's possible, how to?