Power management for ppc 85xx
Chamorro, Marta
Marta.Chamorro at xerox.com
Fri Dec 8 02:53:59 EST 2006
Hi again,
Glad I managed to make sense. I checked the hardware spec on the board
and it looks like we're using everything, apart from the SEC and maybe
the stand-alone I2C (I think we're just using the one within the CMP).
By the way, I made a mistake and the actual processor on the board is
the cut-down 8541, not the 8555. My apologies for that.
This morning I added some printks and confirmed that there is no code
behind pm_ops, so my question remains: is there some code out there that
I can use? (hope so, otherwise I'm doomed...)
Regards and thanks,
Marta Chamorro
-----Original Message-----
From: Kumar Gala [mailto:galak at kernel.crashing.org]
Sent: 06 December 2006 22:53
To: Chamorro, Marta
Cc: linuxppc-dev at ozlabs.org; linuxppc-embedded at ozlabs.org
Subject: Re: Power management for ppc 85xx
On Dec 6, 2006, at 4:27 PM, Chamorro, Marta wrote:
> Hi Kumar, thanks for the reply.
>
> I am not sure I fully understand your question, but here's an
> attempt of
> an answer :)
>
> What I want to do is:
>
> First stage - Get the processor on doze mode (core halted, but
> responds
> to interrupts)
> Second stage - Once I understand how to do that, using all the right
> interfaces and so on, get other devices (mainly image processing
> ASICS)
> to stop clocks.
>
> Does that answer your question? Can you help? Do you know where to
> find
> the code that deals with power management for the ppc 8555?
It does, what periphs are you using on the 8555 itself?
- k
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