Re: OMAP35x GP TIMER as a wakeup trigger

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On Mon, Apr 27, 2009 at 12:08 PM, Premi, Sanjeev <premi@xxxxxx> wrote:
>> -----Original Message-----
>> From: linux-omap-owner@xxxxxxxxxxxxxxx
>> [mailto:linux-omap-owner@xxxxxxxxxxxxxxx] On Behalf Of Ashwin Bihari
>> Sent: Monday, April 27, 2009 9:20 PM
>> To: linux-omap@xxxxxxxxxxxxxxx Mailing List
>> Subject: OMAP35x GP TIMER as a wakeup trigger
>>
>> Greetings,
>>
>> I need to implement a timer as a wake up trigger while my custom board
>> is in the suspended state. I read in the TRM that all of the GPTIMERs
>> have the capability of generating a wake up interrupt. I'm using the
>> 2.6.28-rc8 PM Kernel which contains the patch to enable all the
>> GPTIMERS as wake up sources.
>
> Are you refering to the "suspend" state coming from:
> echo mem > /sys/power/state
> OR
> One of the idle states C0-C6?
>
> To understand the wakeup sequence from suspend; take a look at:
> arch/arm/mach-omap2/serial.c
> ...esp the IOPAD configuration.
>
> You will have to do something similar.
>
> ~sanjeev
>
Sanjeev,

I was talking about the former (echo mem > /sys/power/state) and I
will take a look at the serial.c file and might return with more
questions. :)

Regards
-- Ashwin
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