Re: PowerOp Design and working patch

Scott E. Preece
2006-08-08T13:44:34Z

If you're a device manufacturer, and you build, say 50 devices that all
use the same hardware but, because they are optimized for different
functional use cases, have different preferred operating points and
DVFS policies, it's *highly* desirable to not have to maintain 50
separate builds for those devices. Putting configuration information
in places that can be changed independently of compilation is very
important to us.

scott

| From: Pavel Machek<pavel@ucw.cz>
|
| Hi!
|
| > >> Often, in the embedded world, the person defining the operating
| > >> states will not be a kernel developer, and may not be comfortable
| > >> with, or capable of, creating a kernel module. (There are
| > >
| > > That's okay, we can create HOWTO or something. 'System designed is too
| > > stupid to hack kernel' should not be an argument.
| >
| > It's not a matter of stupidity. The example I gave of not being
| > able to create a kernel module was the situation where loadable
| > module support is not available. A HOWTO wouldn't alter this.
|
| So they need to recompile the kernel. Not a big deal when you are
| developing new machine.
|
| > > Maybe operating points need to be changed at runtime -- I do not think
| > > so -- but *please* get the basic stuff in/merged ASAP and then add
| > > features one-by-one.
| >
| > I agree. :-)
|
| Yes, I believe we are actually in agreement. Maybe features you want
| will indeed be useful, but we want to get basics right, first.
| Pavel
| --
| (english) http://www.livejournal.com/~pavelmachek
| (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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--
scott preece
motorola mobile devices, il67, 1800 s. oak st., champaign, il 61820
e-mail: preece@motorola.com fax: +1-217-384-8550
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