diff options
Diffstat (limited to 'include/linux/pm_domain.h')
| -rw-r--r-- | include/linux/pm_domain.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h new file mode 100644 index 000000000000..b1a22c65380b --- /dev/null +++ b/include/linux/pm_domain.h @@ -0,0 +1,78 @@ +/* + * pm_domain.h - Definitions and headers related to device power domains. + * + * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. + * + * This file is released under the GPLv2. + */ + +#ifndef _LINUX_PM_DOMAIN_H +#define _LINUX_PM_DOMAIN_H + +#include <linux/device.h> + +struct dev_power_governor { + bool (*power_down_ok)(struct dev_pm_domain *domain); +}; + +struct generic_pm_domain { + struct dev_pm_domain domain; /* PM domain operations */ + struct list_head sd_node; /* Node in the parent's subdomain list */ + struct generic_pm_domain *parent; /* Parent PM domain */ + struct list_head sd_list; /* List of dubdomains */ + struct list_head dev_list; /* List of devices */ + struct mutex lock; + struct dev_power_governor *gov; + struct work_struct power_off_work; + unsigned int in_progress; /* Number of devices being suspended now */ + unsigned int sd_count; /* Number of subdomains with power "on" */ + bool power_is_off; /* Whether or not power has been removed */ + int (*power_off)(struct generic_pm_domain *domain); + int (*power_on)(struct generic_pm_domain *domain); + int (*start_device)(struct device *dev); + int (*stop_device)(struct device *dev); +}; + +struct dev_list_entry { + struct list_head node; + struct device *dev; + bool need_restore; +}; + +#ifdef CONFIG_PM_GENERIC_DOMAINS +extern int pm_genpd_add_device(struct generic_pm_domain *genpd, + struct device *dev); +extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, + struct device *dev); +extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, + struct generic_pm_domain *new_subdomain); +extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, + struct generic_pm_domain *target); +extern void pm_genpd_init(struct generic_pm_domain *genpd, + struct dev_power_governor *gov, bool is_off); +#else +static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, + struct device *dev) +{ + return -ENOSYS; +} +static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd, + struct device *dev) +{ + return -ENOSYS; +} +static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, + struct generic_pm_domain *new_sd) +{ + return -ENOSYS; +} +static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, + struct generic_pm_domain *target) +{ + return -ENOSYS; +} +static inline void pm_genpd_init(struct generic_pm_domain *genpd, + struct dev_power_governor *gov, bool is_off) {} +#endif + +#endif /* _LINUX_PM_DOMAIN_H */ |