linux-kernel - RE: Starting point: Suspend to RAM on embedded devices?

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Date:	Thu, 10 Apr 2008 15:04:49 +0200
From:	"Wappler Marcel" <Marcel.Wappler@...dgeco.net>
To:	"Wander Winkelhorst" <w.winkelhorst@...il.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: RE: Starting point: Suspend to RAM on embedded devices?

Wander Winkelhorst wrote:
> Well, my tomtom one V2 takes a couple (5-10) of seconds to wake up
> again. but that time includes reinitialising the bluetooth chip,
> checking the SD card, restarting the GPS, loading AGPS data and
> resuming the navigation software. If you don't have to do all those
> things it would probably resume a lot faster.    

So Wander,

I had a short look in to the opentom.org project and have got a lot of new questions:
- does the opentom.org kernel support the original "suspend to RAM" functionality of TomToms kernel?
- is there anybody using this functionality?
- has somebody measured the power consuption in the sleep mode?
- the opentom kernel has a file "/arch/arm/kernel/apm.c" which is not in the normal Linux kernels. Where comes this file and other
power saving infrastructure from, where can I grab it, is there anyone else out there using it, on which device?


Thanks,
Marcel

Marcel Wappler
Bridgeco AG
CH-8600 Dübendorf
Switzerland
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