diff options
| -rw-r--r-- | drivers/base/power/domain.c | 46 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 16 |
2 files changed, 62 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 058c8b6d2871..e12d3a8a29a9 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1502,6 +1502,52 @@ struct generic_pm_domain *of_genpd_get_from_provider( EXPORT_SYMBOL_GPL(of_genpd_get_from_provider); /** + * of_genpd_add_device() - Add a device to an I/O PM domain + * @genpdspec: OF phandle args to use for look-up PM domain + * @dev: Device to be added. + * + * Looks-up an I/O PM domain based upon phandle args provided and adds + * the device to the PM domain. Returns a negative error code on failure. + */ +int of_genpd_add_device(struct of_phandle_args *genpdspec, struct device *dev) +{ + struct generic_pm_domain *genpd; + + genpd = of_genpd_get_from_provider(genpdspec); + if (IS_ERR(genpd)) + return PTR_ERR(genpd); + + return pm_genpd_add_device(genpd, dev); +} +EXPORT_SYMBOL_GPL(of_genpd_add_device); + +/** + * of_genpd_add_subdomain - Add a subdomain to an I/O PM domain. + * @parent_spec: OF phandle args to use for parent PM domain look-up + * @subdomain_spec: OF phandle args to use for subdomain look-up + * + * Looks-up a parent PM domain and subdomain based upon phandle args + * provided and adds the subdomain to the parent PM domain. Returns a + * negative error code on failure. + */ +int of_genpd_add_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec) +{ + struct generic_pm_domain *parent, *subdomain; + + parent = of_genpd_get_from_provider(parent_spec); + if (IS_ERR(parent)) + return PTR_ERR(parent); + + subdomain = of_genpd_get_from_provider(subdomain_spec); + if (IS_ERR(subdomain)) + return PTR_ERR(subdomain); + + return pm_genpd_add_subdomain(parent, subdomain); +} +EXPORT_SYMBOL_GPL(of_genpd_add_subdomain); + +/** * genpd_dev_pm_detach - Detach a device from its PM domain. * @dev: Device to detach. * @power_off: Currently not used diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 31fec858088c..e1964a242389 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -208,6 +208,10 @@ struct generic_pm_domain *__of_genpd_xlate_simple( struct generic_pm_domain *__of_genpd_xlate_onecell( struct of_phandle_args *genpdspec, void *data); +extern int of_genpd_add_device(struct of_phandle_args *args, + struct device *dev); +extern int of_genpd_add_subdomain(struct of_phandle_args *parent, + struct of_phandle_args *new_subdomain); int genpd_dev_pm_attach(struct device *dev); #else /* !CONFIG_PM_GENERIC_DOMAINS_OF */ @@ -227,6 +231,18 @@ static inline struct generic_pm_domain *of_genpd_get_from_provider( #define __of_genpd_xlate_simple NULL #define __of_genpd_xlate_onecell NULL +static inline int of_genpd_add_device(struct of_phandle_args *args, + struct device *dev) +{ + return -ENODEV; +} + +static inline int of_genpd_add_subdomain(struct of_phandle_args *parent, + struct of_phandle_args *new_subdomain) +{ + return -ENODEV; +} + static inline int genpd_dev_pm_attach(struct device *dev) { return -ENODEV; |