diff options
Diffstat (limited to 'include/linux/devfreq.h')
| -rw-r--r-- | include/linux/devfreq.h | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 98ce8124b1cc..281c72a3b9d5 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -44,6 +44,14 @@ struct devfreq_dev_status { void *private_data; }; +/* + * The resulting frequency should be at most this. (this bound is the + * least upper bound; thus, the resulting freq should be lower or same) + * If the flag is not set, the resulting frequency should be at most the + * bound (greatest lower bound) + */ +#define DEVFREQ_FLAG_LEAST_UPPER_BOUND 0x1 + /** * struct devfreq_dev_profile - Devfreq's user device profile * @initial_freq The operating frequency when devfreq_add_device() is @@ -54,6 +62,8 @@ struct devfreq_dev_status { * higher than any operable frequency, set maximum. * Before returning, target function should set * freq at the current frequency. + * The "flags" parameter's possible values are + * explained above with "DEVFREQ_FLAG_*" macros. * @get_dev_status The device should provide the current performance * status to devfreq, which is used by governors. * @exit An optional callback that is called when devfreq @@ -66,7 +76,7 @@ struct devfreq_dev_profile { unsigned long initial_freq; unsigned int polling_ms; - int (*target)(struct device *dev, unsigned long *freq); + int (*target)(struct device *dev, unsigned long *freq, u32 flags); int (*get_dev_status)(struct device *dev, struct devfreq_dev_status *stat); void (*exit)(struct device *dev); @@ -124,6 +134,8 @@ struct devfreq_governor { * touch this. * @being_removed a flag to mark that this object is being removed in * order to prevent trying to remove the object multiple times. + * @min_freq Limit minimum frequency requested by user (0: none) + * @max_freq Limit maximum frequency requested by user (0: none) * * This structure stores the devfreq information for a give device. * @@ -149,6 +161,9 @@ struct devfreq { void *data; /* private data for governors */ bool being_removed; + + unsigned long min_freq; + unsigned long max_freq; }; #if defined(CONFIG_PM_DEVFREQ) @@ -160,7 +175,7 @@ extern int devfreq_remove_device(struct devfreq *devfreq); /* Helper functions for devfreq user device driver with OPP. */ extern struct opp *devfreq_recommended_opp(struct device *dev, - unsigned long *freq); + unsigned long *freq, u32 flags); extern int devfreq_register_opp_notifier(struct device *dev, struct devfreq *devfreq); extern int devfreq_unregister_opp_notifier(struct device *dev, @@ -200,18 +215,18 @@ struct devfreq_simple_ondemand_data { static struct devfreq *devfreq_add_device(struct device *dev, struct devfreq_dev_profile *profile, struct devfreq_governor *governor, - void *data); + void *data) { return NULL; } -static int devfreq_remove_device(struct devfreq *devfreq); +static int devfreq_remove_device(struct devfreq *devfreq) { return 0; } static struct opp *devfreq_recommended_opp(struct device *dev, - unsigned long *freq) + unsigned long *freq, u32 flags) { return -EINVAL; } |