From: Mark Brown <broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
To: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@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 09:00:43 +0100 [thread overview]
Message-ID: <20110407080042.GF14519@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <20110407095513.4c0b708e-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
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.
next prev parent reply other threads:[~2011-04-07 8:00 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 [this message]
[not found] ` <20110407080042.GF14519-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
2011-04-07 8:25 ` Jean Delvare
[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
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