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Doesn't that mean hardware controls clock gating? Try using "force on" or "force off" and see what happens.

The PSE SPI f_input is 100MHz, but I don't know if it's the same for PCH SPI. Firmware might be able to change f_input for PCH SPI.

thanks i will try

Tried not effect,

Force on, no signal, Force Off works the same way(same frequency)

i tired with PSE SPI,, i am able to get the desired min to max Clock frequency, as per the give calculation,

not sure what is issue with PCH


Thanks
Ravi

I didn't see anything in the datasheets that would explain the PCH behavior. You might have to ask Intel directly.

OctocontrabasS

i have asked some time back yet to receive response from Intel


Thanks
Ravi