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| author |   Ulf Hansson <ulf.hansson@linaro.org> | 2014-09-19 20:27:37 +0200 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-09-22 15:57:40 +0200 |
| commit | 46420dd73b800f87a19af13af5883855cf38cb08 (patch) | |
| tree | be10bd4b1d36b76fb776cc000a71c1f09ea96a42 /include/linux/pm.h | |
| parent | PM / Domains: Add generic OF-based PM domain look-up (diff) | |
| download | linux-dev-46420dd73b800f87a19af13af5883855cf38cb08.tar.xz linux-dev-46420dd73b800f87a19af13af5883855cf38cb08.zip | |
PM / Domains: Add APIs to attach/detach a PM domain for a device
To maintain scalability let's add common methods to attach and detach
a PM domain for a device, dev_pm_domain_attach|detach().
Typically dev_pm_domain_attach() shall be invoked from subsystem level
code at the probe phase to try to attach a device to its PM domain.
The reversed actions may be done a the remove phase and then by
invoking dev_pm_domain_detach().
When attachment succeeds, the attach function should assign its
corresponding detach function to a new ->detach() callback added in the
struct dev_pm_domain.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/pm.h')
| -rw-r--r-- | include/linux/pm.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index 1022ba1eb4de..c4cbf485a5d6 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -622,6 +622,17 @@ struct dev_pm_domain { void (*detach)(struct device *dev, bool power_off); }; +#ifdef CONFIG_PM +extern int dev_pm_domain_attach(struct device *dev, bool power_on); +extern void dev_pm_domain_detach(struct device *dev, bool power_off); +#else +static inline int dev_pm_domain_attach(struct device *dev, bool power_on) +{ + return -ENODEV; +} +static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {} +#endif + /* * The PM_EVENT_ messages are also used by drivers implementing the legacy * suspend framework, based on the ->suspend() and ->resume() callbacks common |