Xingyu Li

How to change an internal clock from PLL to a 24-MHz clock in i.MX28 platform

Discussion created by Xingyu Li Employee on Jan 12, 2012

Our customer wants to lower power consumption as much as possible.
When i.MX28 is run mode, they would like to change an internal clock from PLL to a 24-MHz clock mode.

 supposing there is a sample source code? (PLL => 24MHz mode)

And could you teach how to return it? (24MHz mode => PLL)

[Answer] Please refer to DVFS driver: DvfcUpdateSetpoint function.
function OEMPowerOff() can also give reference.

But it is important to realize 24MHz may not meet the requirement of DDR/MDDR. And CPU performance can not even fulfill audio display under the frequency.

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