[ltp] does anybody know how to calculate cpu voltage for each MHz?

[Jenix]

hi.

i just realized my X40 Pentium-M 723 CPU uses less voltage then X31
Pentium-M CPU.

For example, regarding to Intel Documents, 

when eariler M 1.0GHz CPU gets 600MHz clock, it uses 0.844 voltage,

but, when X40 1.00GHz CPU ( pentium-m 723 ) gets 600MHz clock,

it uses 0.812 voltage.

BUT, the centrino cpu freq source code in kernel does not have
information about that, and it cannot also support less CPU clock. (
when i use windows, i can set Slowest CPU and i get a 219MHz clock. )

so, i wanna make some patches for it, but i don know how i calculate voltage.

does anybody have ideas? Intel didnt answer my question.

please help me.