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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2018-06-29 13:04:32 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-07-09 12:11:02 +0200 |
| commit | 27dceb81f445c58b1d10d27d26eaf4ac2e9e0b00 (patch) | |
| tree | 9f66e6b98015b5ebf2e1939029907e3286861151 | |
| parent | 5d6be70add65e3f236642ab0029e356261617cd0 (diff) | |
| download | linux-27dceb81f445c58b1d10d27d26eaf4ac2e9e0b00.tar.bz2 | |
PM / Domains: Introduce dev_pm_domain_attach_by_name()
For the multiple PM domain case, let's introduce a new API called
dev_pm_domain_attach_by_name(). This allows a consumer driver to associate
its device with one of its PM domains, by using a name based lookup.
Do note that, currently it's only genpd that supports multiple PM domains
per device, but dev_pm_domain_attach_by_name() can easily by extended to
cover other PM domain types, if/when needed.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/base/power/common.c | 17 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 7 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index df41b4780b3b..b413951c6abc 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -153,6 +153,23 @@ struct device *dev_pm_domain_attach_by_id(struct device *dev, EXPORT_SYMBOL_GPL(dev_pm_domain_attach_by_id); /** + * dev_pm_domain_attach_by_name - Associate a device with one of its PM domains. + * @dev: The device used to lookup the PM domain. + * @name: The name of the PM domain. + * + * For a detailed function description, see dev_pm_domain_attach_by_id(). + */ +struct device *dev_pm_domain_attach_by_name(struct device *dev, + char *name) +{ + if (dev->pm_domain) + return ERR_PTR(-EEXIST); + + return genpd_dev_pm_attach_by_name(dev, name); +} +EXPORT_SYMBOL_GPL(dev_pm_domain_attach_by_name); + +/** * dev_pm_domain_detach - Detach a device from its PM domain. * @dev: Device to detach. * @power_off: Used to indicate whether we should power off the device. diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 03e14a38462d..776c546d581a 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -309,6 +309,8 @@ struct generic_pm_domain *of_genpd_remove_last(struct device_node *np) int dev_pm_domain_attach(struct device *dev, bool power_on); struct device *dev_pm_domain_attach_by_id(struct device *dev, unsigned int index); +struct device *dev_pm_domain_attach_by_name(struct device *dev, + char *name); void dev_pm_domain_detach(struct device *dev, bool power_off); void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd); #else @@ -321,6 +323,11 @@ static inline struct device *dev_pm_domain_attach_by_id(struct device *dev, { return NULL; } +static inline struct device *dev_pm_domain_attach_by_name(struct device *dev, + char *name) +{ + return NULL; +} static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {} static inline void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd) {} |