From: Mark Brown <broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
To: Sonny Rao <sonnyrao-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-pm-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
"Jean Delvare (PC drivers,
core)" <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>,
"Ben Dooks (embedded platforms)"
<ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
Subject: Re: [RFC][PATCH] Enable async suspend/resume of i2c devices
Date: Wed, 6 Apr 2011 06:23:35 +0100 [thread overview]
Message-ID: <20110406052335.GA25578@sirena.org.uk> (raw)
In-Reply-To: <BANLkTik7i0VQpJb+enUd9c4-XvZQ1S57fQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Mon, Apr 04, 2011 at 08:47:01PM -0700, Sonny Rao wrote:
> This improves our resume time when we have devices on an i2c bus
> that are slow to resume. In particular we have a light sensor that
> adds about 50ms of resume time on one device. We have to enable it
> both on the i2c master and i2c client side and then we get fully async
> suspend/resume. I suspect we'll see nice gains on systems with more
> i2c devices and will test that out soon.
>
> Signed-off-by: Sonny Rao <sonnyrao-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
It'd probably help if the patch explained why this is safe - my
immediate question is why if it's safe to just unconditionally enable
async suspend for all I2C clients and adaptors it's not safe to do so
for all devices of all types?
next prev parent reply other threads:[~2011-04-06 5:23 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 [this message]
[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
[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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