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Re: FW: Alchemy power managment code.

To: linux-mips@linux-mips.org
Subject: Re: FW: Alchemy power managment code.
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Date: Mon, 24 Mar 2008 17:31:39 +0300
Cc: Nico Coesel <ncoesel@DEALogic.nl>
In-reply-to: <47E7B970.30105@ru.mvista.com>
Organization: MontaVista Software Inc.
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <19CA9E279FDA5246B7D7A1C91A4AF7F40EF804@dealogicserver.DEALogic.nl> <47E7B970.30105@ru.mvista.com>
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I just wrote:

 >    The TOY cpunter 0 clockevent driver is also need to be written for
the recent kernel as CP0 timer stops ticking after wait insn is executed -- see arch/mips/au1000/common/time.c...

And here's found another possible issue with Alchemy PM -- the CP0 counter counts at unpredictable frequency in idle state (after executing "wait"), so the MIPS clocksource will probably be unstable?

WBR, Sergei

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