From: Francesco VIRLINZI <francesco.virlinzi@st.com>
To: linux-sh@vger.kernel.org
Subject: Re: [PATCH][RFC] sh: suspend interpreter V1
Date: Fri, 17 Apr 2009 06:44:27 +0000 [thread overview]
Message-ID: <49E8254B.50307@st.com> (raw)
In-Reply-To: <20090323091739.25647.6773.sendpatchset@rx1.opensource.se>
Hi Magnus
> Have a look at the following presentation for more information about
> the standby modes on SuperH Mobile:
>
> http://www.celinuxforum.org/CelfPubWiki/ELC2009Presentations?action=AttachFile&do=view&target=Runtime-Power-Management-on-SuperH-Mobile-20090407.pdf
>
>
I just completed something similar on our ST40 (with PMB enabled).
We put the DRAM in self refresh an after that we totally turn-off the
SOC removing the power.
An external little micro has to detect the wakeup event and has to
turn-on the SOC.
The bootloader "understands" linux is frozen in memory and jump directly
on linux.
Internally we call that "hibernation on memory" and clearly it needs
update in both linux/bootloader...
But from the device driver point of view this is a normal hibernation
while for the main core this is a special 'boot'.
Currently as major change I did are in the TMU/PMB and some asm code to
manage the "reboot".
Do you think there is something shareable?
Ciao
Francesco
next prev parent reply other threads:[~2009-04-17 6:44 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-23 9:17 [PATCH][RFC] sh: suspend interpreter V1 Magnus Damm
2009-03-23 15:35 ` Francesco VIRLINZI
2009-03-24 7:00 ` Francesco VIRLINZI
2009-03-24 11:08 ` Magnus Damm
2009-03-24 13:41 ` Francesco VIRLINZI
2009-03-25 10:10 ` Magnus Damm
2009-03-25 14:46 ` takasi-y
2009-03-30 2:45 ` Magnus Damm
2009-03-30 7:02 ` Francesco VIRLINZI
2009-03-31 8:42 ` Paul Mundt
2009-04-15 11:15 ` Magnus Damm
2009-04-15 11:23 ` Paul Mundt
2009-04-16 14:15 ` Francesco VIRLINZI
2009-04-16 14:22 ` Francesco VIRLINZI
2009-04-17 2:07 ` Magnus Damm
2009-04-17 6:44 ` Francesco VIRLINZI [this message]
2009-04-17 10:39 ` Magnus Damm
2009-04-17 12:00 ` Francesco VIRLINZI
2009-04-17 21:38 ` Jean-Christophe PLAGNIOL-VILLARD
2009-04-20 10:26 ` Magnus Damm
2009-04-20 12:27 ` Jean-Christophe PLAGNIOL-VILLARD
2009-04-20 12:33 ` Francesco VIRLINZI
2009-04-20 12:55 ` Francesco VIRLINZI
2009-04-20 13:03 ` Jean-Christophe PLAGNIOL-VILLARD
2009-04-20 13:15 ` Jean-Christophe PLAGNIOL-VILLARD
2009-04-20 13:30 ` Michael Trimarchi
2009-04-21 7:17 ` Francesco VIRLINZI
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