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PM / devfreq: provide hooks for governors to be registered

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Add devfreq_add_governor and devfreq_remove_governor which
can be invoked by governors to register with devfreq.

This sets up the stage to dynamically switch governors and
allow governors to be dynamically loaded as well.

Cc: Rajagopal Venkat <rajagopal.venkat@linaro.org>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Kevin Hilman <khilman@ti.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Nishanth Menon 2012-10-29 15:01:43 -05:00 • committed by MyungJoo Ham
parent 2df5021fa9
commit 3aa173b8db
3 changed files with 98 additions and 0 deletions
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3
include/linux/devfreq.h
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@ -92,6 +92,7 @@ struct devfreq_dev_profile {
/**
* struct devfreq_governor - Devfreq policy governor
* @node: list node - contains registered devfreq governors
* @name: Governor's name
* @get_target_freq: Returns desired operating frequency for the device.
* Basically, get_target_freq will run
@ -107,6 +108,8 @@ struct devfreq_dev_profile {
* Note that the callbacks are called with devfreq->lock locked by devfreq.
*/
struct devfreq_governor {
struct list_head node;
const char name[DEVFREQ_NAME_LEN];
int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
int (*event_handler)(struct devfreq *devfreq,