From: anarsoul@gmail.com (Vasily Khoruzhick)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/8] ARM: PXA: Z2: Add poweroff function
Date: Sat, 12 Mar 2011 00:30:08 +0200 [thread overview]
Message-ID: <201103120030.08986.anarsoul@gmail.com> (raw)
In-Reply-To: <201103112316.57914.marek.vasut@gmail.com>
On Saturday 12 March 2011 00:16:57 Marek Vasut wrote:
> On Friday 11 March 2011 23:12:40 Vasily Khoruzhick wrote:
> > On Saturday 12 March 2011 00:08:58 Marek Vasut wrote:
> > > On Friday 11 March 2011 22:53:11 Vasily Khoruzhick wrote:
> > > > On Friday 11 March 2011 23:39:03 Marek Vasut wrote:
> > > > > On Friday 11 March 2011 11:23:40 Vasily Khoruzhick wrote:
> > > > > > Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
> > > > >
> > > > > This looks bogus to me as you cannot power down the thing. Besides,
> > > > > where do you resume to from this so-called "powerdown" ? Since the
> > > > > bootloader will consider it as a legitimate deepsleep resume.
> > > >
> > > > It eats only 0.7mA in deepsleep, but 6.7mA in sleep (PXA2xx has 2
> > > > sleep modes), so deepsleep is pretty close to poweroff.
> > >
> > > So the power to the CPU is actually cut? It isn't, right ?
> >
> > It isn't. But looks like power to memory is cut. But stock bootloader
> > puts it in deepsleep to save battery.
>
> Power to memory is cut? How come? You mean rather the refresh is disabled,
> right ? But anyway, isn't the ram put into self-refresh ?
Well, it looks like memory content is not preserved, or something wrong with
bootloader. Anyway, it does not resume after deepsleep for some reason, I
can't check better, as I have no JTAG. Maybe you can investigate this problem?
> > > Mine (I use mainline uboot) doesn't.
> >
> > Can you re-check it?
>
> Check what ? Yes I can ...
No need, I understand how it works, PSPR is null, so after u-boot loads PSPR
to pc it performs 'soft reset' (jumps to 0x0, to begin of NOR flash), RCSR
bits are already cleared, so it just boots kernel.
Regards
Vasily
next prev parent reply other threads:[~2011-03-11 22:30 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-11 10:23 [PATCH 1/8] ARM: PXA: Z2: Use only power button as wake source Vasily Khoruzhick
2011-03-11 10:23 ` [PATCH 2/8] ARM: PXA: Z2: Enable OHCI on Zipit Z2 Vasily Khoruzhick
2011-03-11 14:56 ` [PATCH v2 " Vasily Khoruzhick
2011-03-11 21:42 ` Marek Vasut
2011-03-11 21:49 ` Vasily Khoruzhick
2011-03-11 21:50 ` Marek Vasut
2011-03-11 21:55 ` Vasily Khoruzhick
2011-03-11 22:13 ` Marek Vasut
2011-03-11 22:34 ` Vasily Khoruzhick
2011-03-12 0:07 ` Marek Vasut
2011-03-12 11:32 ` Vasily Khoruzhick
2011-03-12 13:28 ` Marek Vasut
2011-03-13 10:18 ` Pavel Machek
2011-03-13 12:29 ` Marek Vasut
2011-03-13 17:10 ` Pavel Machek
2011-03-13 18:34 ` Marek Vasut
2011-03-13 22:15 ` Vasily Khoruzhick
2011-03-11 21:41 ` [PATCH " Marek Vasut
2011-03-11 10:23 ` [PATCH 3/8] ARM: PXA: Z2: Fix battery pdata Vasily Khoruzhick
2011-03-11 21:39 ` Marek Vasut
2011-03-11 10:23 ` [PATCH 4/8] ARM: PXA: Z2: Add mtd partition with logo Vasily Khoruzhick
2011-03-11 21:39 ` Marek Vasut
2011-03-11 22:31 ` Vasily Khoruzhick
2011-03-12 0:05 ` Marek Vasut
2011-03-15 14:39 ` Pavel Machek
2011-03-16 14:11 ` Marek Vasut
2011-03-16 16:51 ` Pavel Machek
2011-03-11 10:23 ` [PATCH 5/8] ARM: PXA: Z2: Add poweroff function Vasily Khoruzhick
2011-03-11 21:39 ` Marek Vasut
2011-03-11 21:53 ` Vasily Khoruzhick
2011-03-11 22:08 ` Marek Vasut
2011-03-11 22:12 ` Vasily Khoruzhick
2011-03-11 22:16 ` Marek Vasut
2011-03-11 22:30 ` Vasily Khoruzhick [this message]
2011-03-12 0:05 ` Marek Vasut
2011-03-12 2:29 ` Eric Miao
2011-03-12 8:06 ` Vasily Khoruzhick
2011-03-12 11:06 ` Marek Vasut
2011-03-12 11:30 ` Vasily Khoruzhick
2011-03-12 13:16 ` Marek Vasut
2011-03-12 20:33 ` Vasily Khoruzhick
2011-03-12 20:35 ` Marek Vasut
2011-03-12 20:34 ` Vasily Khoruzhick
2011-03-12 22:29 ` Marek Vasut
2011-03-15 15:49 ` Eric Miao
2011-03-15 15:57 ` Vasily Khoruzhick
2011-03-15 16:42 ` Eric Miao
2011-03-15 20:11 ` [PATCH v2] " Vasily Khoruzhick
2011-07-05 6:58 ` Eric Miao
2011-03-15 14:41 ` [PATCH 5/8] " Pavel Machek
2011-03-11 10:23 ` [PATCH 6/8] ARM: PXA: Z2: Fix libertas init/tear down sequences Vasily Khoruzhick
2011-03-11 21:37 ` Marek Vasut
2011-03-11 21:41 ` Vasily Khoruzhick
2011-03-11 21:51 ` Marek Vasut
2011-03-11 10:23 ` [PATCH 7/8] ARM: PXA: Z2: Keep kbd backlight disabled by default Vasily Khoruzhick
2011-03-11 21:36 ` Marek Vasut
2011-03-11 10:23 ` [PATCH 8/8] ARM: PXA: Z2: Add default triggers for LEDs Vasily Khoruzhick
2011-03-11 21:36 ` Marek Vasut
2011-03-11 21:43 ` [PATCH 1/8] ARM: PXA: Z2: Use only power button as wake source Marek Vasut
2011-03-13 10:15 ` Pavel Machek
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=201103120030.08986.anarsoul@gmail.com \
--to=anarsoul@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).