From: Jonathan Kunkee <jonathan.kunkee@gm...> - 2012-01-09 23:58:46
I am looking to use a Gumstix Water in a particularly power-sensitive device
(I know, big surprise), and the patches I've developed are most easily applied
to the 2.6.39 kernel. I have found Sakoman's Overview of OMAP PM:
...which I have read through. I am already using the suggestions involving
cpufreq and CPU idle, and I will look into using the Shutdown and Suspend
facilities that are described there.
Thus we come to my questions:
* Are there any on-CoM subsystems that can be turned off? (I remember
reading somewhere that the voltage regulators can either be turned off or set
to efficient settings; also, I'm not using the graphics subsystem on the chip.)
* Does disabling a subsystem in the kernel config automatically put those parts
in low-power mode?
* Once upon a time I heard about RTC skew with clock rate changes. Is this a
problem I need to consider, or merely a figment of my imagination?
* Are there any other concerns or techniques for reducing the Gumstix' power
consumption while running?
* Are there any other resources I should read?
Thanks for your time!
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