Re: [linux-pm] PowerOP 1/3: PowerOP core

[Daniel Petrini <d.pensator@gmail.com>]

> If these general ideas of arbitrary platform power parameters and
> operating points are deemed worthy of continued consideration, I'll
> propose what I view is the next step: interfaces to create and activate
> operating points from userspace.
> 
> At that point it should be possible to write power policy management
> applications for systems that can benefit from this generalized notion
> of operating points: create the operating points that match the system
> usage models (in the case of many embedded systems, the system is some
> mode with different power/performance characteristics such as audio
> playback vs. mobile phone call in progress) and power needs (e.g., low
> battery strength vs. high strength) and activate operating points based
> on events received (new app running, low battery warning, etc.).
> 
> Any opinions on all that?  Thanks,
> 
> --
> Todd

Hi,

I'd like to have an idea of how the powerop would evolve to address:

a) exporting all operating points to sysfs - that would be useful for
a policy manager in user space, or the user policy will already be
aware of the ops?

b) Constraints: if I would like to change to a op and such a
transition is not allowed in hardware, what part of the software will
test it? The set/get powerop functions, the higher layers or even some
lower layer (don't know if expected) ?

thanks,

Daniel
-- 
10LE - Linux
INdT - Manaus - Brazil