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Commit 079d364b authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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
parents 8592013b b3d3b9fb

drivers/base/power/domain.c

+117 −9
Original line number Diff line number Diff line
@@ -53,6 +53,24 @@ 
static LIST_HEAD(gpd_list);

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



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");

}



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)

{

	bool ret = false;
@@ -262,10 +274,28 @@ int pm_genpd_poweron(struct generic_pm_domain *genpd) 
	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 */



#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)

{

	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);

}





/**

 * __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.

 * @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;

	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;



 start:
@@ -1603,6 +1647,35 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, 
	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.

 * @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);



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 gpd_cpu_data *cpu_data;
@@ -1805,7 +1887,24 @@ int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state) 
	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 cpuidle_state *idle_state;
@@ -1836,6 +1935,15 @@ int genpd_detach_cpuidle(struct generic_pm_domain *genpd) 
	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. */



/**

include/linux/pm_domain.h

+56 −17
Original line number Diff line number Diff line
@@ -138,35 +138,32 @@ extern int __pm_genpd_of_add_device(struct device_node *genpd_node, 
				    struct device *dev,

				    struct gpd_timing_data *td);



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);

}

extern int __pm_genpd_name_add_device(const char *domain_name,

				      struct device *dev,

				      struct gpd_timing_data *td);



extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,

				  struct device *dev);

extern void pm_genpd_dev_need_restore(struct device *dev, bool val);

extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,

				  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,

				     struct generic_pm_domain *target);

extern int pm_genpd_add_callbacks(struct device *dev,

				  struct gpd_dev_ops *ops,

				  struct gpd_timing_data *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 genpd_detach_cpuidle(struct generic_pm_domain *genpd);

extern int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state);

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,

			  struct dev_power_governor *gov, bool is_off);



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);
@@ -187,8 +184,15 @@ static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd, 
{

	return -ENOSYS;

}

static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,

				      struct device *dev)

static inline int __pm_genpd_of_add_device(struct device_node *genpd_node,

					   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;

}
@@ -203,6 +207,11 @@ static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, 
{

	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,

					    struct generic_pm_domain *target)

{
@@ -218,11 +227,19 @@ static inline int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td) 
{

	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;

}

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;

}
@@ -234,6 +251,10 @@ static inline int pm_genpd_poweron(struct generic_pm_domain *genpd) 
{

	return -ENOSYS;

}

static inline int pm_genpd_name_poweron(const char *domain_name)

{

	return -ENOSYS;

}

static inline bool default_stop_ok(struct device *dev)

{

	return false;
@@ -242,6 +263,24 @@ static inline bool default_stop_ok(struct device *dev) 
#define pm_domain_always_on_gov NULL

#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)

{

	return __pm_genpd_remove_callbacks(dev, true);