Re: Power management for ppc 85xx

On Dec 7, 2006, at 9:53 AM, Chamorro, Marta wrote:

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...)

I'm sorry to say you're doomed.  I don't believe anyone's spent any  
time trying to do pwr mgmt on 85xx.

- k

-----Original Message-----
From: Kumar Gala [mailto:galak@kernel.crashing.org]
Sent: 06 December 2006 22:53
To: Chamorro, Marta
Cc: linuxppc-dev@ozlabs.org; linuxppc-embedded@ozlabs.org
Subject: Re: Power management for ppc 85xx


On Dec 6, 2006, at 4:27 PM, Chamorro, Marta wrote:

quoted

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