OMAP3430 Linux Power Management. 16 Apr 2008 Version 1. Too big to fully describe but lets try . Digital Television with Linux - Architecture and Opportunities from Bas Engel cancelled. Will fill in and expand on yesterday’s demo on OMAP3 power
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16 Apr 2008
Richard Woodruff / Texas Instruments
Texas Instruments OMAP3430
ARM CortexA8 + TI IVA2.2 + IMG SGX530 + TI ISP + more…
Power domain latency constraint can be used to control the transitions (OFF/RET) of a particular power domain
In some cases drivers do not know when to express a power domain latency constraint, either because it is not aware of the current system level use case or because it does not know when its API will be called next by an upper layer stack.
For such cases, an inactivity timer is provided (for CORE and PER domains) that will delay the transition of a power domain to OFF
Interrupt latency constraint will be used to prevent a system wide low power state
Drivers can also prevent OFF mode by keeping their clocks active (in which case OFF is not attempted).How to Prevent Domain Power OFF?