include/linux/pm_domain.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
3  * pm_domain.h - Definitions and headers related to device power domains.
32  *				->power_on|off(), doesn't sleep. Hence, these
34  *				enables genpd to power on/off the PM domain,
40  * GENPD_FLAG_ALWAYS_ON:	Instructs genpd to always keep the PM domain
43  * GENPD_FLAG_ACTIVE_WAKEUP:	Instructs genpd to keep the PM domain powered
51  *				deploy idle power management support for CPUs
54  *				last-man-standing algorithm, for the CPUs in the
55  *				PM domain.
57  * GENPD_FLAG_RPM_ALWAYS_ON:	Instructs genpd to always keep the PM domain
62  *				optimal idle state.
73 	GENPD_STATE_ON = 0,	/* PM domain is on */
74 	GENPD_STATE_OFF,	/* PM domain is off */
85 	bool (*power_down_ok)(struct dev_pm_domain *domain);
111 	struct dev_pm_domain domain;	/* PM domain operations */  member
113 	struct list_head parent_links;	/* Links with PM domain as a parent */
114 	struct list_head child_links;	/* Links with PM domain as a child */
118 	struct fwnode_handle *provider;	/* Identity of the domain provider */
122 	enum gpd_status status;	/* Current state of the domain */
126 	unsigned int performance_state;	/* Aggregated max performance state */
128 	int (*power_off)(struct generic_pm_domain *domain);
129 	int (*power_on)(struct generic_pm_domain *domain);
135 				     unsigned int state);
138 	ktime_t next_wakeup;	/* Maintained by the domain governor */
142 	int (*attach_dev)(struct generic_pm_domain *domain,
144 	void (*detach_dev)(struct generic_pm_domain *domain,
151 	unsigned int state_idx; /* state that genpd will go to when off */
167 	return container_of(pd, struct generic_pm_domain, domain);  in pd_to_genpd()
176 	/* Sub-domain's per-master domain performance state */
213 	return to_gpd_data(dev->power.subsys_data->domain_data);  in dev_gpd_data()
225 int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);
239 	return ERR_PTR(-ENOSYS);  in dev_gpd_data()
244 	return -ENOSYS;  in pm_genpd_add_device()
248 	return -ENOSYS;  in pm_genpd_remove_device()
253 	return -ENOSYS;  in pm_genpd_add_subdomain()
258 	return -ENOSYS;  in pm_genpd_remove_subdomain()
263 	return -ENOSYS;  in pm_genpd_init()
267 	return -ENOTSUPP;  in pm_genpd_remove()
271 						     unsigned int state)  in dev_pm_genpd_set_performance_state()  argument
273 	return -ENOTSUPP;  in dev_pm_genpd_set_performance_state()
279 	return -ENOTSUPP;  in dev_pm_genpd_add_notifier()
284 	return -ENOTSUPP;  in dev_pm_genpd_remove_notifier()
302 /* OF PM domain providers */
340 	return -ENOTSUPP;  in of_genpd_add_provider_simple()
346 	return -ENOTSUPP;  in of_genpd_add_provider_onecell()
354 	return -ENODEV;  in of_genpd_add_device()
360 	return -ENODEV;  in of_genpd_add_subdomain()
366 	return -ENODEV;  in of_genpd_remove_subdomain()
372 	return -ENODEV;  in of_genpd_parse_idle_states()
402 	return ERR_PTR(-ENOTSUPP);  in of_genpd_remove_last()