linux-kernel - RE: [PATCHv1] ARM: imx: Add support for low power suspend on MX51.

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Date:	Wed, 2 Mar 2011 19:41:45 +0000
From:	Nguyen Dinh-R00091 <R00091@...escale.com>
To:	Arnaud Patard <arnaud.patard@...-net.org>
CC:	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
	Zhang Lily-R58066 <R58066@...escale.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCHv1] ARM: imx: Add support for low power suspend on MX51.

Hi Arnaud,

>-----Original Message-----
>From: linux-arm-kernel-bounces@...ts.infradead.org [mailto:linux-arm-kernel-
>bounces@...ts.infradead.org] On Behalf Of Arnaud Patard
>Sent: Wednesday, March 02, 2011 1:35 PM
>To: Nguyen Dinh-R00091
>Cc: linux@....linux.org.uk; s.hauer@...gutronix.de; linux-kernel@...r.kernel.org; u.kleine-
>koenig@...gutronix.de; Zhang Lily-R58066; linux-arm-kernel@...ts.infradead.org
>Subject: Re: [PATCHv1] ARM: imx: Add support for low power suspend on MX51.
>
><Dinh.Nguyen@...escale.com> writes:
>
>Hi,
>
>> From: Dinh Nguyen <Dinh.Nguyen@...escale.com>
>>
>> Adds initial low power suspend functionality to MX51.
>> Supports "mem" and "standby" modes.
>
>I've very quickly tried suspend to mem on my system and despite having set
>some irq as wakeup source, it doesn't wake up. Is there some extra step
>to be done in order to test your patch ?
>
>Moreover, the code I've seen for suspend is very different. It's seems
>to handle some cpufreq stuff and seems to be copying some code into some
>special ram. Is all this stuff unneeded ?

I am able to wakeup using gpio-key on my mx51-babbage system if I comment out the most of the drivers except for the gpio-keys driver. Yes, there are additional cpufreq and code that needs to get run in IRAM for mx51, which I will add on to this patch. This is just the initial patch to put the SoC in to suspend and have other developers add to it.

Thanks,

Dinh

>
>Arnaud
>
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>linux-arm-kernel mailing list
>linux-arm-kernel@...ts.infradead.org
>http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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