From: Wolfram Sang <wsa@the-dreams.de>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>,
linux-i2c@vger.kernel.org, linux-pm@vger.kernel.org,
Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
Lars-Peter Clausen <lars@metafoo.de>,
Krzysztof Kozlowski <k.kozlowski@samsung.com>
Subject: Re: [PATCH] i2c: s3c2410: remove superfluous runtime PM calls
Date: Sat, 19 Dec 2015 22:57:52 +0100 [thread overview]
Message-ID: <20151219215752.GA1247@tetsubishi> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1512191202150.27155-100000@netrider.rowland.org>
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> > Asking linux-pm for help here: If we want to support RuntimePM for I2C
> > clients, do we need to enable RuntimePM on the logical I2C adapter
> > device (the bus master) which is already marked using
> > pm_runtime_no_callbacks?
>
> In theory you don't need to. But there are some advantages if you do:
> You get automatic runtime PM time accounting for the adapter device
> (how much time active and how much suspended), and suspend events will
> propagate from the I2C clients all the way up to the adapter's parent.
That's exactly what I want. Thank you very much!
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prev parent reply other threads:[~2015-12-19 21:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-15 18:14 [PATCH] i2c: s3c2410: remove superfluous runtime PM calls Wolfram Sang
2015-12-16 13:53 ` Sylwester Nawrocki
2015-12-17 9:46 ` Charles Keepax
2015-12-19 10:52 ` Wolfram Sang
2015-12-19 10:50 ` Wolfram Sang
2015-12-19 17:05 ` Alan Stern
2015-12-19 21:57 ` Wolfram Sang [this message]
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