Merge branch 'pm-domains'

* pm-domains:
  PM / Domains: Fix compilation warning related to genpd_start_dev_no_timing()
  PM / Domains: Operations related to cpuidle using domain names
  PM / Domains: Document cpuidle-related functions and change their names
  PM / Domains: Add power-on function using names to identify domains
  PM / Domains: Make it possible to use names when adding subdomains
  PM / Domains: Make it possible to use domain names when adding devices
This commit is contained in:
Rafael J. Wysocki 2012-09-17 20:25:33 +02:00
commit 079d364b04
2 changed files with 173 additions and 26 deletions
drivers/base/power
include/linux

View File

@ -53,6 +53,24 @@
static LIST_HEAD(gpd_list); static LIST_HEAD(gpd_list);
static DEFINE_MUTEX(gpd_list_lock); static DEFINE_MUTEX(gpd_list_lock);
static struct generic_pm_domain *pm_genpd_lookup_name(const char *domain_name)
{
struct generic_pm_domain *genpd = NULL, *gpd;
if (IS_ERR_OR_NULL(domain_name))
return NULL;
mutex_lock(&gpd_list_lock);
list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
if (!strcmp(gpd->name, domain_name)) {
genpd = gpd;
break;
}
}
mutex_unlock(&gpd_list_lock);
return genpd;
}
#ifdef CONFIG_PM #ifdef CONFIG_PM
struct generic_pm_domain *dev_to_genpd(struct device *dev) struct generic_pm_domain *dev_to_genpd(struct device *dev)
@ -75,12 +93,6 @@ static int genpd_start_dev(struct generic_pm_domain *genpd, struct device *dev)
start_latency_ns, "start"); start_latency_ns, "start");
} }
static int genpd_start_dev_no_timing(struct generic_pm_domain *genpd,
struct device *dev)
{
return GENPD_DEV_CALLBACK(genpd, int, start, dev);
}
static bool genpd_sd_counter_dec(struct generic_pm_domain *genpd) static bool genpd_sd_counter_dec(struct generic_pm_domain *genpd)
{ {
bool ret = false; bool ret = false;
@ -262,10 +274,28 @@ int pm_genpd_poweron(struct generic_pm_domain *genpd)
return ret; return ret;
} }
/**
* pm_genpd_name_poweron - Restore power to a given PM domain and its masters.
* @domain_name: Name of the PM domain to power up.
*/
int pm_genpd_name_poweron(const char *domain_name)
{
struct generic_pm_domain *genpd;
genpd = pm_genpd_lookup_name(domain_name);
return genpd ? pm_genpd_poweron(genpd) : -EINVAL;
}
#endif /* CONFIG_PM */ #endif /* CONFIG_PM */
#ifdef CONFIG_PM_RUNTIME #ifdef CONFIG_PM_RUNTIME
static int genpd_start_dev_no_timing(struct generic_pm_domain *genpd,
struct device *dev)
{
return GENPD_DEV_CALLBACK(genpd, int, start, dev);
}
static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev) static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev)
{ {
return GENPD_DEV_TIMED_CALLBACK(genpd, int, save_state, dev, return GENPD_DEV_TIMED_CALLBACK(genpd, int, save_state, dev,
@ -1465,6 +1495,19 @@ int __pm_genpd_of_add_device(struct device_node *genpd_node, struct device *dev,
return __pm_genpd_add_device(genpd, dev, td); return __pm_genpd_add_device(genpd, dev, td);
} }
/**
* __pm_genpd_name_add_device - Find I/O PM domain and add a device to it.
* @domain_name: Name of the PM domain to add the device to.
* @dev: Device to be added.
* @td: Set of PM QoS timing parameters to attach to the device.
*/
int __pm_genpd_name_add_device(const char *domain_name, struct device *dev,
struct gpd_timing_data *td)
{
return __pm_genpd_add_device(pm_genpd_lookup_name(domain_name), dev, td);
}
/** /**
* pm_genpd_remove_device - Remove a device from an I/O PM domain. * pm_genpd_remove_device - Remove a device from an I/O PM domain.
* @genpd: PM domain to remove the device from. * @genpd: PM domain to remove the device from.
@ -1557,7 +1600,8 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
struct gpd_link *link; struct gpd_link *link;
int ret = 0; int ret = 0;
if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain)) if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain)
|| genpd == subdomain)
return -EINVAL; return -EINVAL;
start: start:
@ -1603,6 +1647,35 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
return ret; return ret;
} }
/**
* pm_genpd_add_subdomain_names - Add a subdomain to an I/O PM domain.
* @master_name: Name of the master PM domain to add the subdomain to.
* @subdomain_name: Name of the subdomain to be added.
*/
int pm_genpd_add_subdomain_names(const char *master_name,
const char *subdomain_name)
{
struct generic_pm_domain *master = NULL, *subdomain = NULL, *gpd;
if (IS_ERR_OR_NULL(master_name) || IS_ERR_OR_NULL(subdomain_name))
return -EINVAL;
mutex_lock(&gpd_list_lock);
list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
if (!master && !strcmp(gpd->name, master_name))
master = gpd;
if (!subdomain && !strcmp(gpd->name, subdomain_name))
subdomain = gpd;
if (master && subdomain)
break;
}
mutex_unlock(&gpd_list_lock);
return pm_genpd_add_subdomain(master, subdomain);
}
/** /**
* pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain. * pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain.
* @genpd: Master PM domain to remove the subdomain from. * @genpd: Master PM domain to remove the subdomain from.
@ -1756,7 +1829,16 @@ int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td)
} }
EXPORT_SYMBOL_GPL(__pm_genpd_remove_callbacks); EXPORT_SYMBOL_GPL(__pm_genpd_remove_callbacks);
int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state) /**
* pm_genpd_attach_cpuidle - Connect the given PM domain with cpuidle.
* @genpd: PM domain to be connected with cpuidle.
* @state: cpuidle state this domain can disable/enable.
*
* Make a PM domain behave as though it contained a CPU core, that is, instead
* of calling its power down routine it will enable the given cpuidle state so
* that the cpuidle subsystem can power it down (if possible and desirable).
*/
int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
{ {
struct cpuidle_driver *cpuidle_drv; struct cpuidle_driver *cpuidle_drv;
struct gpd_cpu_data *cpu_data; struct gpd_cpu_data *cpu_data;
@ -1805,7 +1887,24 @@ int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
goto out; goto out;
} }
int genpd_detach_cpuidle(struct generic_pm_domain *genpd) /**
* pm_genpd_name_attach_cpuidle - Find PM domain and connect cpuidle to it.
* @name: Name of the domain to connect to cpuidle.
* @state: cpuidle state this domain can manipulate.
*/
int pm_genpd_name_attach_cpuidle(const char *name, int state)
{
return pm_genpd_attach_cpuidle(pm_genpd_lookup_name(name), state);
}
/**
* pm_genpd_detach_cpuidle - Remove the cpuidle connection from a PM domain.
* @genpd: PM domain to remove the cpuidle connection from.
*
* Remove the cpuidle connection set up by pm_genpd_attach_cpuidle() from the
* given PM domain.
*/
int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
{ {
struct gpd_cpu_data *cpu_data; struct gpd_cpu_data *cpu_data;
struct cpuidle_state *idle_state; struct cpuidle_state *idle_state;
@ -1836,6 +1935,15 @@ int genpd_detach_cpuidle(struct generic_pm_domain *genpd)
return ret; return ret;
} }
/**
* pm_genpd_name_detach_cpuidle - Find PM domain and disconnect cpuidle from it.
* @name: Name of the domain to disconnect cpuidle from.
*/
int pm_genpd_name_detach_cpuidle(const char *name)
{
return pm_genpd_detach_cpuidle(pm_genpd_lookup_name(name));
}
/* Default device callbacks for generic PM domains. */ /* Default device callbacks for generic PM domains. */
/** /**

View File

@ -138,35 +138,32 @@ extern int __pm_genpd_of_add_device(struct device_node *genpd_node,
struct device *dev, struct device *dev,
struct gpd_timing_data *td); struct gpd_timing_data *td);
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, extern int __pm_genpd_name_add_device(const char *domain_name,
struct device *dev) struct device *dev,
{ struct gpd_timing_data *td);
return __pm_genpd_add_device(genpd, dev, NULL);
}
static inline int pm_genpd_of_add_device(struct device_node *genpd_node,
struct device *dev)
{
return __pm_genpd_of_add_device(genpd_node, dev, NULL);
}
extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
struct device *dev); struct device *dev);
extern void pm_genpd_dev_need_restore(struct device *dev, bool val); extern void pm_genpd_dev_need_restore(struct device *dev, bool val);
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *new_subdomain); struct generic_pm_domain *new_subdomain);
extern int pm_genpd_add_subdomain_names(const char *master_name,
const char *subdomain_name);
extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *target); struct generic_pm_domain *target);
extern int pm_genpd_add_callbacks(struct device *dev, extern int pm_genpd_add_callbacks(struct device *dev,
struct gpd_dev_ops *ops, struct gpd_dev_ops *ops,
struct gpd_timing_data *td); struct gpd_timing_data *td);
extern int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td); extern int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td);
extern int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state); extern int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state);
extern int genpd_detach_cpuidle(struct generic_pm_domain *genpd); extern int pm_genpd_name_attach_cpuidle(const char *name, int state);
extern int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd);
extern int pm_genpd_name_detach_cpuidle(const char *name);
extern void pm_genpd_init(struct generic_pm_domain *genpd, extern void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off); struct dev_power_governor *gov, bool is_off);
extern int pm_genpd_poweron(struct generic_pm_domain *genpd); extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
extern int pm_genpd_name_poweron(const char *domain_name);
extern bool default_stop_ok(struct device *dev); extern bool default_stop_ok(struct device *dev);
@ -187,8 +184,15 @@ static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
{ {
return -ENOSYS; return -ENOSYS;
} }
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, static inline int __pm_genpd_of_add_device(struct device_node *genpd_node,
struct device *dev) struct device *dev,
struct gpd_timing_data *td)
{
return -ENOSYS;
}
static inline int __pm_genpd_name_add_device(const char *domain_name,
struct device *dev,
struct gpd_timing_data *td)
{ {
return -ENOSYS; return -ENOSYS;
} }
@ -203,6 +207,11 @@ static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
{ {
return -ENOSYS; return -ENOSYS;
} }
static inline int pm_genpd_add_subdomain_names(const char *master_name,
const char *subdomain_name)
{
return -ENOSYS;
}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *target) struct generic_pm_domain *target)
{ {
@ -218,11 +227,19 @@ static inline int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td)
{ {
return -ENOSYS; return -ENOSYS;
} }
static inline int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st) static inline int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st)
{ {
return -ENOSYS; return -ENOSYS;
} }
static inline int genpd_detach_cpuidle(struct generic_pm_domain *genpd) static inline int pm_genpd_name_attach_cpuidle(const char *name, int state)
{
return -ENOSYS;
}
static inline int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
{
return -ENOSYS;
}
static inline int pm_genpd_name_detach_cpuidle(const char *name)
{ {
return -ENOSYS; return -ENOSYS;
} }
@ -234,6 +251,10 @@ static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
{ {
return -ENOSYS; return -ENOSYS;
} }
static inline int pm_genpd_name_poweron(const char *domain_name)
{
return -ENOSYS;
}
static inline bool default_stop_ok(struct device *dev) static inline bool default_stop_ok(struct device *dev)
{ {
return false; return false;
@ -242,6 +263,24 @@ static inline bool default_stop_ok(struct device *dev)
#define pm_domain_always_on_gov NULL #define pm_domain_always_on_gov NULL
#endif #endif
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev)
{
return __pm_genpd_add_device(genpd, dev, NULL);
}
static inline int pm_genpd_of_add_device(struct device_node *genpd_node,
struct device *dev)
{
return __pm_genpd_of_add_device(genpd_node, dev, NULL);
}
static inline int pm_genpd_name_add_device(const char *domain_name,
struct device *dev)
{
return __pm_genpd_name_add_device(domain_name, dev, NULL);
}
static inline int pm_genpd_remove_callbacks(struct device *dev) static inline int pm_genpd_remove_callbacks(struct device *dev)
{ {
return __pm_genpd_remove_callbacks(dev, true); return __pm_genpd_remove_callbacks(dev, true);