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| author |   Ulf Hansson <ulf.hansson@linaro.org> | 2023-09-25 15:17:07 +0200 |
|---|---|---|
| committer |   Viresh Kumar <viresh.kumar@linaro.org> | 2023-10-06 12:37:33 +0530 |
| commit | 3fbc5c3b8522d655cf91d32c158261060fdc02fe (patch) | |
| tree | c3b6ec0a7ed2cc0e80c716e2c962776932508b90 /include/linux | |
| parent | Linux 6.6-rc1 (diff) | |
| download | wireguard-linux-3fbc5c3b8522d655cf91d32c158261060fdc02fe.tar.xz wireguard-linux-3fbc5c3b8522d655cf91d32c158261060fdc02fe.zip | |
PM: domains: Introduce dev_pm_domain_set_performance_state()
The generic PM domain is currently the only PM domain variant that supports
performance scaling. To allow performance scaling to be supported through a
common interface, let's add an optional callback ->set_performance_state(),
in the struct dev_pm_domain.
Moreover, let's add a function, dev_pm_domain_set_performance_state(), that
may be called by consumers to request a new performance state for a device
through its PM domain.
Note that, in most cases it's preferred that a consumer use the OPP library
to request a new performance state for its device. Although, this requires
some additional changes to be supported, which are being implemented from
subsequent changes.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pm.h | 2 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index 1400c37b29c7..4c9f571609c8 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -719,6 +719,7 @@ extern void dev_pm_put_subsys_data(struct device *dev); * @activate: Called before executing probe routines for bus types and drivers. * @sync: Called after successful driver probe. * @dismiss: Called after unsuccessful driver probe and after driver removal. + * @set_performance_state: Called to request a new performance state. * * Power domains provide callbacks that are executed during system suspend, * hibernation, system resume and during runtime PM transitions instead of @@ -731,6 +732,7 @@ struct dev_pm_domain { int (*activate)(struct device *dev); void (*sync)(struct device *dev); void (*dismiss)(struct device *dev); + int (*set_performance_state)(struct device *dev, unsigned int state); }; /* diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index f776fb93eaa0..bda2964a0a56 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -430,6 +430,7 @@ struct device *dev_pm_domain_attach_by_name(struct device *dev, void dev_pm_domain_detach(struct device *dev, bool power_off); int dev_pm_domain_start(struct device *dev); void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd); +int dev_pm_domain_set_performance_state(struct device *dev, unsigned int state); #else static inline int dev_pm_domain_attach(struct device *dev, bool power_on) { @@ -452,6 +453,11 @@ static inline int dev_pm_domain_start(struct device *dev) } static inline void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd) {} +static inline int dev_pm_domain_set_performance_state(struct device *dev, + unsigned int state) +{ + return 0; +} #endif #endif /* _LINUX_PM_DOMAIN_H */ |