linux-kernel - Re: [PATCH v6 0/7] This is the 1st version of suspend for RK3288.

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Date:	Wed, 29 Oct 2014 22:50:53 +0100
From:	Heiko Stübner <heiko@...ech.de>
To:	Kevin Hilman <khilman@...nel.org>
Cc:	Chris Zhong <zyw@...k-chips.com>, dianders@...omium.org,
	mturquette@...aro.org,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-rockchip@...ts.infradead.org, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org, Kumar Gala <galak@...eaurora.org>,
	devicetree@...r.kernel.org, Tony Xie <xxx@...k-chips.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v6 0/7] This is the 1st version of suspend for RK3288.

Am Mittwoch, 29. Oktober 2014, 13:06:05 schrieb Kevin Hilman:
> Hi Chris,
> 
> Chris Zhong <zyw@...k-chips.com> writes:
> > RK3288 can shut down the cpu, gpu and other device controllers in suspend,
> > and it will pull the GLOBAL_PWROFF pin to high in the final stage of the
> > process of suspend, pull the pin to low again when resume.
> 
> I tried to test this on top of linux-next (next-20141029) and it doesn't
> wake up from serial port activity.
> 
> Can you describe how to test this, as well as describe dependencies on
> other out-of-tree patches, including pointers to where they've been
> posted.
> 
> Also, please describe how you tested this and on which hardware
> platforms.  It's a big help to reviewers to know how it's been tested,
> and for anyone with similar hardware to know what else it's been tested
> on.

When testing this series it did go to sleep with

/ # echo mem > /sys/power/state 
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.010 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.010 seconds) done.
PM: suspend of devices complete after 0.001 msecs
PM: late suspend of devices complete after 0.001 msecs
PM: noirq suspend of devices complete after 0.001 msecs
Disabling non-boot CPUs ...
CPU1: shutdown
CPU2: shutdown
CPU3: shutdown

and the change in pmic-noise lets me assume it's really asleep.


But I'm not exactly sure how to wake it up again. I even hard-wired the gpio-
keys to always enable the irq wake, but so far it didn't wake again when 
pressing the power-key on the evb.

If anyone wants to peek, the collected patches (Doug's and Chris') can be 
found on [0].


Heiko


[0] https://github.com/mmind/linux-rockchip/tree/wip/rk3288-suspend
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