From: Scott Wood <scottwood@freescale.com>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 1/3] mpc83xx: Power Management support
Date: Thu, 26 Jun 2008 09:07:44 -0500 [thread overview]
Message-ID: <4863A2B0.9000303@freescale.com> (raw)
In-Reply-To: <D70F79B4-BA5F-46D4-9D74-4CB2E375AF60@kernel.crashing.org>
Kumar Gala wrote:
>
> On Jun 25, 2008, at 4:50 PM, Scott Wood wrote:
>
>> Basic PM support for 83xx. Standby is implemented as sleep.
>> Suspend-to-RAM is implemented as "deep sleep" (with the processor
>> turned off) on 831x. PCI agent power management is supported.
>>
>> Device power management of SOC peripherals is not yet supported.
>
> (Not comments on this patch, but related)
>
> Do you know if anyone is looking at making sure DOZE/NAP work on 83xx?
> We clearly don't flush the L1 cache today in the 6xx code.
Doze should work (a long time ago when I did power measurements I saw a
drop in consumption once Linux started, and the system was idle)... Nap
is not supported, and should probably be removed from the e300 cputable
entry. I don't think it's worthwhile to flush the cache every time the
cpu is idle just to nap instead of doze.
-Scott
next prev parent reply other threads:[~2008-06-26 14:08 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-25 21:50 [PATCH 1/3] mpc83xx: Power Management support Scott Wood
2008-06-26 13:43 ` Kumar Gala
2008-06-26 14:07 ` Scott Wood [this message]
2008-06-26 14:39 ` Liu Dave
2008-06-26 14:54 ` Kumar Gala
2008-07-02 16:03 ` Kumar Gala
2008-07-02 16:38 ` Scott Wood
2008-07-02 17:06 ` Kumar Gala
2008-07-02 17:12 ` Scott Wood
2008-07-02 17:37 ` Kumar Gala
2008-07-02 17:46 ` Scott Wood
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