how to turn off modules to achieve lower power consumption

[bergo]

Hey,

I'm trying to achieve low power consumption using i.mx51 EVK, in order to do so I'm compiling a very slim kernel, taking off any unnecessary module / peripheral.

I've heard this is not enough as the peripheral are still consuming power although not being used by the kernel.

If this is so, how can I turn them off to achieve lower power consumption?

This community has been very helpful in the past, and I hope you can help me with some input,

thank you very much in advance,

[jimmychan · Accepted solution]

You may try to turn off the clock of the module. There are seven Clock Gating Register (CCGR0-CCGR6) to control the clock of each module. Please read the Chapter 7.3.3.26 in i.MX51 Reference manual for more details.