From: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
To: Mark Brown
<broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
Cc: Sonny Rao <sonnyrao-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
"Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>,
Alan Stern
<stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>,
linux-pm-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
Subject: Re: [RFC][PATCH] Enable async suspend/resume of i2c devices
Date: Thu, 7 Apr 2011 10:25:44 +0200 [thread overview]
Message-ID: <20110407102544.4c34dfeb@endymion.delvare> (raw)
In-Reply-To: <20110407080042.GF14519-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
On Thu, 7 Apr 2011 09:00:43 +0100, Mark Brown wrote:
> On Thu, Apr 07, 2011 at 09:55:13AM +0200, Jean Delvare wrote:
> > On Thu, 7 Apr 2011 07:31:24 +0900, Mark Brown wrote:
>
> > > You definitely don't know *anything* about the relationships for I2C,
> > > especially in embedded systems.
>
> > Can you please elaborate? The i2c subsystem uses a standard
> > parent-children relationship. It seems fairly similar to USB for
> > example. The only special case I can think of is with bus multiplexing,
> > but it would be easy enough to switch off async suspend/resume in this
> > case.
>
> For I2C itself that's the case but for power and GPIO (which are very
> common in conjunction with I2C in the embedded context) we loose the
> tree. This is much less of an issue with buses like PCI where
> everything is bundled into the bus.
Out of curiosity, how is this handled in the synchronous suspend/resume
case?
--
Jean Delvare
next prev parent reply other threads:[~2011-04-07 8:25 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-05 3:47 [RFC][PATCH] Enable async suspend/resume of i2c devices Sonny Rao
[not found] ` <BANLkTik7i0VQpJb+enUd9c4-XvZQ1S57fQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-04-06 5:23 ` Mark Brown
[not found] ` <20110406052335.GA25578-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2011-04-06 6:51 ` Sonny Rao
2011-04-06 7:52 ` Jean Delvare
[not found] ` <20110406095240.410b4e7e-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-06 8:16 ` Sonny Rao
[not found] ` <BANLkTimaRdRNOYM43AhjrU70o=GL0Q-D-A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-04-06 8:23 ` Jean Delvare
2011-04-06 14:49 ` [linux-pm] " Alan Stern
[not found] ` <Pine.LNX.4.44L0.1104061043220.1907-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2011-04-06 22:31 ` Mark Brown
[not found] ` <20110406223123.GA5297-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
2011-04-06 23:08 ` Sonny Rao
[not found] ` <BANLkTikApnXBtP7c=QLEvM9ye=_YZiSSqw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-04-07 5:22 ` Rafael J. Wysocki
[not found] ` <201104070722.44771.rjw-KKrjLPT3xs0@public.gmane.org>
2011-04-07 6:45 ` Sonny Rao
2011-04-07 7:55 ` Jean Delvare
[not found] ` <20110407095513.4c0b708e-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-07 8:00 ` Mark Brown
[not found] ` <20110407080042.GF14519-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
2011-04-07 8:25 ` Jean Delvare [this message]
[not found] ` <20110407102544.4c34dfeb-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-07 14:34 ` Alan Stern
2011-04-07 8:19 ` Sonny Rao
[not found] ` <BANLkTikDc6QhtK6F5VTX4iCkT0CAiXvztg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-04-07 8:33 ` Jean Delvare
2011-04-07 5:18 ` Rafael J. Wysocki
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=20110407102544.4c34dfeb@endymion.delvare \
--to=khali-puyad+kwke1g9huczpvpmw@public.gmane.org \
--cc=ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org \
--cc=broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org \
--cc=linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-pm-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org \
--cc=rjw-KKrjLPT3xs0@public.gmane.org \
--cc=sonnyrao-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org \
--cc=stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.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).