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PM / Domains: Support for generic I/O PM domains

From:  "Rafael J. Wysocki" <>
To:  Linux PM mailing list <>
Subject:  [PATCH 0/10 v6] PM / Domains: Support for generic I/O PM domains
Date:  Sat, 25 Jun 2011 23:24:13 +0200
Message-ID:  <>
Cc:  "Greg Kroah-Hartman" <>, Magnus Damm <>, Paul Walmsley <>, Kevin Hilman <>, Alan Stern <>, LKML <>,, Paul Mundt <>
Archive-link:  Article


Well, one more update. :-)

This is the 6th version of the patchset adding support for generic I/O PM
domains.  The majority of patches have had some small fixes here and there
to make things work when CONFIG_PM_RUNTIME is unset.  In addition to that,
to make the shmobile code introduced by the last patch work for
CONFIG_PM_RUNTIME unset I had to add patches [8-9/10].  Patch [7/10]
adds wakeup support that was missing from the previous version and I
decided not to push patch [1/10] for 3.0 after all.

On Saturday, June 11, 2011, Rafael J. Wysocki wrote:
> The model here is that a bunch of devices share a common power resource
> that can be turned on and off by software.  In addition to that, there
> are means to start and stop the activity of each device, for example
> by manipulating their clocks.  Moreover, there may be hierarchy of
> such things, for example power resource A may be necessary for devices
> a, b, c, which don't rely on any other power resources, and for devices
> x, y, z that also rely on power resource X.  In that case there one PM
> domain object representing devices a, b, c and power resource A, and 
> another PM domain object will represent devices x, y, z with power
> resource X, plus the first object will be the second one's parent.
> Overall, I think I've taken all of the important dependencies into
> consideration, but if you spot something suspicious, please let me know. :-)

[ 1/10] - Rename struct dev_power_domain to struct dev_pm_domain to reflect the
          fact that those objects need not correspond to hardware power domains

[ 2/10] - Move subsys_data in struct dev_pm_info out of #ifdef CONFIG_PM_RUNTIME

[ 3/10] - Introduce runtime PM support for generic I/O PM domains.

[ 4/10] - Introduce generic "noirq" callbacks for system suspend/hibernation
          (that's necessary for the next patches).
[ 5/10] - Move some PM domains support code fro under #ifdef CONFIG_PM_RUNTIME

[ 6/10] - Add system-wide PM support for generic I/O PM domains.

[ 7/10] - Add support for wakeup from system sleep to the I/O PM domains code.

[ 8/10] - Allow PM clocks management code to be used during system suspend.

[ 9/10] - Rename PM clock management functions so that they names reflect the
          fact that they can be used during system suspend too.

[10/10] - Use the new code to represent the SH7372's A4MP power domain.

All of these patches are regarded as 3.1 material and they are available
from the git branch at:

git:// pm-domains  

The patchset has been tested on SH7372 Mackerel board for both
CONFIG_PM_RUNTIME set and unset.


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