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author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-10-16 21:26:49 (GMT) |
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committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-10-16 21:26:49 (GMT) |
commit | 9bd717c0dc8224cadfd66df7eeff98c987711d98 (patch) | |
tree | bca8a9232d457d984d87da53b5ffadcb7dcd46be /Documentation | |
parent | 7811ac276bb9f77aa6475110ef340c1bc3090def (diff) | |
parent | 857b36c7b038ac56a882ee914df93e5985443074 (diff) | |
download | linux-9bd717c0dc8224cadfd66df7eeff98c987711d98.tar.xz |
Merge branch 'pm-runtime' into pm-for-linus
* pm-runtime:
PM / Runtime: Handle .runtime_suspend() failure correctly
PM / Runtime: Fix kerneldoc comment for rpm_suspend()
PM / Runtime: Update document about callbacks
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/power/runtime_pm.txt | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index 1f05404..0e85608 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -43,13 +43,18 @@ struct dev_pm_ops { ... }; -The ->runtime_suspend(), ->runtime_resume() and ->runtime_idle() callbacks are -executed by the PM core for either the device type, or the class (if the device -type's struct dev_pm_ops object does not exist), or the bus type (if the -device type's and class' struct dev_pm_ops objects do not exist) of the given -device (this allows device types to override callbacks provided by bus types or -classes if necessary). The bus type, device type and class callbacks are -referred to as subsystem-level callbacks in what follows. +The ->runtime_suspend(), ->runtime_resume() and ->runtime_idle() callbacks +are executed by the PM core for either the power domain, or the device type +(if the device power domain's struct dev_pm_ops does not exist), or the class +(if the device power domain's and type's struct dev_pm_ops object does not +exist), or the bus type (if the device power domain's, type's and class' +struct dev_pm_ops objects do not exist) of the given device, so the priority +order of callbacks from high to low is that power domain callbacks, device +type callbacks, class callbacks and bus type callbacks, and the high priority +one will take precedence over low priority one. The bus type, device type and +class callbacks are referred to as subsystem-level callbacks in what follows, +and generally speaking, the power domain callbacks are used for representing +power domains within a SoC. By default, the callbacks are always invoked in process context with interrupts enabled. However, subsystems can use the pm_runtime_irq_safe() helper function |