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authorChanwoo Choi <cw00.choi@samsung.com>2017-04-06 07:19:35 +0300
committerMyungJoo Ham <myungjoo.ham@samsung.com>2017-04-12 06:42:14 +0300
commit3ea6b7001ef5da9f9816ee3c4fe731f4fe08b865 (patch)
tree40b519f4a28a95c9728e581d258292bfa55ac20c /drivers/devfreq/governor.h
parent39da7c509acff13fc8cb12ec1bb20337c988ed36 (diff)
downloadlinux-3ea6b7001ef5da9f9816ee3c4fe731f4fe08b865.tar.xz
PM / devfreq: Move struct devfreq_governor to devfreq directory
This patch moves the struct devfreq_governor from header file to the devfreq directory because this structure is private data and it have to be only accessed by the devfreq core. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/devfreq/governor.h')
-rw-r--r--drivers/devfreq/governor.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h
index 71576b8bdfef..a4f2fa1091e4 100644
--- a/drivers/devfreq/governor.h
+++ b/drivers/devfreq/governor.h
@@ -25,6 +25,35 @@
#define DEVFREQ_GOV_SUSPEND 0x4
#define DEVFREQ_GOV_RESUME 0x5
+/**
+ * struct devfreq_governor - Devfreq policy governor
+ * @node: list node - contains registered devfreq governors
+ * @name: Governor's name
+ * @immutable: Immutable flag for governor. If the value is 1,
+ * this govenror is never changeable to other governor.
+ * @get_target_freq: Returns desired operating frequency for the device.
+ * Basically, get_target_freq will run
+ * devfreq_dev_profile.get_dev_status() to get the
+ * status of the device (load = busy_time / total_time).
+ * If no_central_polling is set, this callback is called
+ * only with update_devfreq() notified by OPP.
+ * @event_handler: Callback for devfreq core framework to notify events
+ * to governors. Events include per device governor
+ * init and exit, opp changes out of devfreq, suspend
+ * and resume of per device devfreq during device idle.
+ *
+ * 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];
+ const unsigned int immutable;
+ int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
+ int (*event_handler)(struct devfreq *devfreq,
+ unsigned int event, void *data);
+};
+
/* Caution: devfreq->lock must be locked before calling update_devfreq */
extern int update_devfreq(struct devfreq *devfreq);