From: Mika Westerberg <mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Kevin Hilman <khilman-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>,
"Rafael J. Wysocki"
<rafael.j.wysocki-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Lv Zheng <lv.zheng-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Aaron Lu <aaron.lu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Dmitry Torokhov
<dmitry.torokhov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Mauro Carvalho Chehab
<m.chehab-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Samuel Ortiz <sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Liam Girdwood <lgirdwood-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Kyungmin Park
<kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH v2 1/9] i2c: prepare runtime PM support for I2C client devices
Date: Fri, 13 Sep 2013 13:16:11 +0300 [thread overview]
Message-ID: <20130913101611.GA7393@intel.com> (raw)
In-Reply-To: <20130913095950.GA29403-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
On Fri, Sep 13, 2013 at 10:59:50AM +0100, Mark Brown wrote:
> On Fri, Sep 13, 2013 at 09:54:34AM +0300, Mika Westerberg wrote:
> > On Thu, Sep 12, 2013 at 02:34:21PM -0700, Kevin Hilman wrote:
>
> > > For hardware that is disabled/powered-off on startup, there will now be
> > > a mismatch between the hardware state an the RPM core state.
>
> > The call to pm_runtime_get_noresume() should make sure that the device is
> > in active state (at least in state where it can access the bus) if I'm
> > understanding this right.
>
> Accessing the bus isn't an issue for I2C outside of ACPI, the power
> management of the device is totally disassociated from the bus and the
> controller is responsible for ensuring it is available during transfers.
Yes, but since we want to support ACPI as well, we must make sure that the
adapter (and the associated controller) is available when client ->probe()
is called.
next prev parent reply other threads:[~2013-09-13 10:16 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-11 15:32 [PATCH v2 0/9] runtime PM support for I2C and SPI client devices Mika Westerberg
2013-09-11 15:32 ` [PATCH v2 1/9] i2c: prepare runtime PM support for I2C " Mika Westerberg
2013-09-12 21:34 ` Kevin Hilman
[not found] ` <87vc25pvvm.fsf-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2013-09-12 21:40 ` Kevin Hilman
2013-09-13 6:54 ` Mika Westerberg
2013-09-13 9:59 ` Mark Brown
[not found] ` <20130913095950.GA29403-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-09-13 10:16 ` Mika Westerberg [this message]
2013-09-13 10:31 ` Mark Brown
[not found] ` <20130913103152.GE29403-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-09-13 11:50 ` Mika Westerberg
[not found] ` <20130913115035.GB7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-13 12:10 ` Mark Brown
2013-09-13 14:30 ` Kevin Hilman
2013-09-13 14:50 ` Mika Westerberg
[not found] ` <20130913145022.GC7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-13 17:31 ` Mika Westerberg
2013-09-13 21:10 ` Kevin Hilman
2013-09-15 6:41 ` Mika Westerberg
2013-09-15 12:47 ` Mark Brown
[not found] ` <20130915124744.GW29403-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-09-15 13:28 ` Mika Westerberg
2013-09-16 10:12 ` Mark Brown
[not found] ` <20130916101249.GX29403-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-09-16 14:38 ` Mika Westerberg
[not found] ` <20130916143811.GP7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-16 14:46 ` Graeme Gregory
2013-09-16 15:13 ` Mika Westerberg
2013-09-13 15:14 ` Sylwester Nawrocki
[not found] ` <52332BF0.4060605-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2013-09-13 15:40 ` Mika Westerberg
[not found] ` <20130913154013.GD7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-15 13:48 ` Sylwester Nawrocki
[not found] ` <5235BA9C.1090509-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-09-16 8:47 ` Mika Westerberg
2013-09-16 19:07 ` Rafael J. Wysocki
[not found] ` <1861747.RtS0ZLgUUN-sKB8Sp2ER+y1GS7QM15AGw@public.gmane.org>
2013-09-16 23:31 ` Mark Brown
[not found] ` <20130916233111.GB21013-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-09-17 1:25 ` Rafael J. Wysocki
[not found] ` <1820315.QOOAzSjac3-sKB8Sp2ER+y1GS7QM15AGw@public.gmane.org>
2013-09-17 10:48 ` Mark Brown
2013-09-17 11:00 ` Mika Westerberg
[not found] ` <20130917110021.GU7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-17 21:38 ` Rafael J. Wysocki
[not found] ` <20130916084708.GN7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-17 11:07 ` Sylwester Nawrocki
2013-09-24 5:18 ` Mika Westerberg
2013-09-12 22:06 ` Sylwester Nawrocki
2013-09-13 1:14 ` Aaron Lu
[not found] ` <523266EC.1060501-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-13 10:02 ` Mark Brown
2013-09-11 15:32 ` [PATCH v2 2/9] i2c: attach/detach I2C client device to the ACPI power domain Mika Westerberg
2013-09-11 15:32 ` [PATCH v2 3/9] Input: misc - convert existing I2C client drivers to use I2C core runtime PM Mika Westerberg
2013-09-11 15:32 ` [PATCH v2 4/9] [media] s5p-tv: convert " Mika Westerberg
2013-09-11 15:32 ` [PATCH v2 5/9] drivers/misc: convert existing I2C clients driver " Mika Westerberg
2013-09-12 21:29 ` Greg Kroah-Hartman
2013-09-11 15:32 ` [PATCH v2 6/9] mfd: wm8994: convert " Mika Westerberg
2013-09-11 16:12 ` Samuel Ortiz
2013-09-12 9:24 ` Mika Westerberg
[not found] ` <20130912092447.GJ7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-12 9:28 ` Samuel Ortiz
2013-09-11 15:32 ` [PATCH v2 7/9] ASoC: codecs: convert existing I2C client drivers " Mika Westerberg
[not found] ` <1378913560-2752-8-git-send-email-mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2013-09-11 15:44 ` Mark Brown
2013-09-11 15:32 ` [PATCH v2 8/9] spi: prepare runtime PM support for SPI devices Mika Westerberg
[not found] ` <1378913560-2752-9-git-send-email-mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2013-09-11 15:51 ` Mark Brown
2013-09-12 9:27 ` Mika Westerberg
[not found] ` <20130912092743.GK7393-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-09-12 9:31 ` Mark Brown
[not found] ` <20130912093145.GA29403-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-09-12 9:43 ` Mika Westerberg
2013-09-12 11:04 ` Rafael J. Wysocki
2013-09-12 11:04 ` Wolfram Sang
2013-09-12 12:20 ` Mika Westerberg
[not found] ` <14222641.vVF4lKBqCB-sKB8Sp2ER+y1GS7QM15AGw@public.gmane.org>
2013-09-12 12:25 ` Mika Westerberg
2013-09-11 15:32 ` [PATCH v2 9/9] spi: attach/detach SPI device to the ACPI power domain Mika Westerberg
2013-09-11 15:51 ` Mark Brown
[not found] ` <1378913560-2752-1-git-send-email-mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2013-09-11 15:53 ` [PATCH v2 0/9] runtime PM support for I2C and SPI client devices Mark Brown
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