diff options
Diffstat (limited to 'include/linux/devfreq.h')
| -rw-r--r-- | include/linux/devfreq.h | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 121a2430d7f7..d312ffbac4dd 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -15,8 +15,6 @@ #include <linux/pm_opp.h> #include <linux/pm_qos.h> -#define DEVFREQ_NAME_LEN 16 - /* DEVFREQ governor name */ #define DEVFREQ_GOV_SIMPLE_ONDEMAND "simple_ondemand" #define DEVFREQ_GOV_PERFORMANCE "performance" @@ -40,6 +38,8 @@ enum devfreq_timer { struct devfreq; struct devfreq_governor; +struct devfreq_cpu_data; +struct thermal_cooling_device; /** * struct devfreq_dev_status - Data given from devfreq user device to @@ -100,6 +100,9 @@ struct devfreq_dev_status { * @freq_table: Optional list of frequencies to support statistics * and freq_table must be generated in ascending order. * @max_state: The size of freq_table. + * + * @is_cooling_device: A self-explanatory boolean giving the device a + * cooling effect property. */ struct devfreq_dev_profile { unsigned long initial_freq; @@ -114,6 +117,8 @@ struct devfreq_dev_profile { unsigned long *freq_table; unsigned int max_state; + + bool is_cooling_device; }; /** @@ -139,15 +144,17 @@ struct devfreq_stats { * using devfreq. * @profile: device-specific devfreq profile * @governor: method how to choose frequency based on the usage. - * @governor_name: devfreq governor name for use with this devfreq + * @opp_table: Reference to OPP table of dev.parent, if one exists. * @nb: notifier block used to notify devfreq object that it should * reevaluate operable frequencies. Devfreq users may use * devfreq.nb to the corresponding register notifier call chain. * @work: delayed work for load monitoring. + * @freq_table: current frequency table used by the devfreq driver. + * @max_state: count of entry present in the frequency table. * @previous_freq: previously configured frequency value. * @last_status: devfreq user device info, performance statistics - * @data: Private data of the governor. The devfreq framework does not - * touch this. + * @data: devfreq driver pass to governors, governor should not change it. + * @governor_data: private data for governors, devfreq core doesn't touch it. * @user_min_freq_req: PM QoS minimum frequency request from user (via sysfs) * @user_max_freq_req: PM QoS maximum frequency request from user (via sysfs) * @scaling_min_freq: Limit minimum frequency requested by OPP interface @@ -158,6 +165,7 @@ struct devfreq_stats { * @suspend_count: suspend requests counter for a device. * @stats: Statistics of devfreq device behavior * @transition_notifier_list: list head of DEVFREQ_TRANSITION_NOTIFIER notifier + * @cdev: Cooling device pointer if the devfreq has cooling property * @nb_min: Notifier block for DEV_PM_QOS_MIN_FREQUENCY * @nb_max: Notifier block for DEV_PM_QOS_MAX_FREQUENCY * @@ -176,14 +184,18 @@ struct devfreq { struct device dev; struct devfreq_dev_profile *profile; const struct devfreq_governor *governor; - char governor_name[DEVFREQ_NAME_LEN]; + struct opp_table *opp_table; struct notifier_block nb; struct delayed_work work; + unsigned long *freq_table; + unsigned int max_state; + unsigned long previous_freq; struct devfreq_dev_status last_status; - void *data; /* private data for governors */ + void *data; + void *governor_data; struct dev_pm_qos_request user_min_freq_req; struct dev_pm_qos_request user_max_freq_req; @@ -200,6 +212,9 @@ struct devfreq { struct srcu_notifier_head transition_notifier_list; + /* Pointer to the cooling device if used for thermal mitigation */ + struct thermal_cooling_device *cdev; + struct notifier_block nb_min; struct notifier_block nb_max; }; @@ -259,8 +274,8 @@ void devm_devfreq_unregister_notifier(struct device *dev, struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node); struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, const char *phandle_name, int index); +#endif /* CONFIG_PM_DEVFREQ */ -#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) /** * struct devfreq_simple_ondemand_data - ``void *data`` fed to struct devfreq * and devfreq_add_device @@ -278,9 +293,12 @@ struct devfreq_simple_ondemand_data { unsigned int upthreshold; unsigned int downdifferential; }; -#endif -#if IS_ENABLED(CONFIG_DEVFREQ_GOV_PASSIVE) +enum devfreq_parent_dev_type { + DEVFREQ_PARENT_DEV, + CPUFREQ_PARENT_DEV, +}; + /** * struct devfreq_passive_data - ``void *data`` fed to struct devfreq * and devfreq_add_device @@ -292,8 +310,11 @@ struct devfreq_simple_ondemand_data { * 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 + * @parent_type: the parent type of the device. + * @this: the devfreq instance of own device. + * @nb: the notifier block for DEVFREQ_TRANSITION_NOTIFIER or + * CPUFREQ_TRANSITION_NOTIFIER list. + * @cpu_data_list: the list of cpu frequency data for all cpufreq_policy. * * 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 @@ -307,13 +328,16 @@ struct devfreq_passive_data { /* Optional callback to decide the next frequency of passvice device */ int (*get_target_freq)(struct devfreq *this, unsigned long *freq); + /* Should set the type of parent device */ + enum devfreq_parent_dev_type parent_type; + /* For passive governor's internal use. Don't need to set them */ struct devfreq *this; struct notifier_block nb; + struct list_head cpu_data_list; }; -#endif -#else /* !CONFIG_PM_DEVFREQ */ +#if !defined(CONFIG_PM_DEVFREQ) static inline struct devfreq *devfreq_add_device(struct device *dev, struct devfreq_dev_profile *profile, const char *governor_name, |