Hi,
How can I turn off DVFS and enable DPS in OMAP PM? I have an
application where the system waits for a serial port event, and would
like it to remain in a low power mode, and blank out the screen, while
it waits for a serial event.
Here is a quote from section 4.1.23 of the TRM
Dynamic Power Switching
Like DVFS, dynamic power switching (DPS) is a power-management
technique aimed at reducing active
power consumption of a device. However, whereas DVFS reduces both
dynamic and leakage power
consumption, DPS reduces only leakage power consumption, at the
expense of a slight overhead in
dynamic power consumption.
With DPS, the system switches dynamically between high- and low-
consumption system power modes
during system active time. When DPS is applied, a processor or system
runs at the highest OPP
(maximum frequency and voltage) to complete its tasks quickly,
followed by an automatic switch to a
low-power mode, for minimum power consumption. DPS is useful when a
real-time application is waiting
for an event. The system can switch into a low-power system mode if
the wake-up latency conditions allow
it.
Best regards,
Elvis
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