diff options
Diffstat (limited to 'include/linux/devfreq.h')
| -rw-r--r-- | include/linux/devfreq.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 98c699304e12..2de4e2eea180 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -272,6 +272,39 @@ struct devfreq_simple_ondemand_data { }; #endif +#if IS_ENABLED(CONFIG_DEVFREQ_GOV_PASSIVE) +/** + * struct devfreq_passive_data - void *data fed to struct devfreq + * and devfreq_add_device + * @parent: the devfreq instance of parent device. + * @get_target_freq: Optional callback, Returns desired operating frequency + * for the device using passive governor. That is called + * when passive governor should decide the next frequency + * by using the new frequency of parent devfreq device + * using governors except for passive governor. + * If the devfreq device has the specific method to decide + * the next frequency, should use this callback. + * @this: the devfreq instance of own device. + * @nb: the notifier block for DEVFREQ_TRANSITION_NOTIFIER list + * + * The devfreq_passive_data have to set the devfreq instance of parent + * device with governors except for the passive governor. But, don't need to + * initialize the 'this' and 'nb' field because the devfreq core will handle + * them. + */ +struct devfreq_passive_data { + /* Should set the devfreq instance of parent device */ + struct devfreq *parent; + + /* Optional callback to decide the next frequency of passvice device */ + int (*get_target_freq)(struct devfreq *this, unsigned long *freq); + + /* For passive governor's internal use. Don't need to set them */ + struct devfreq *this; + struct notifier_block nb; +}; +#endif + #else /* !CONFIG_PM_DEVFREQ */ static inline struct devfreq *devfreq_add_device(struct device *dev, struct devfreq_dev_profile *profile, |