1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * pm_domain.h - Definitions and headers related to device power domains.
4 *
5 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
6 */
7
8 #ifndef _LINUX_PM_DOMAIN_H
9 #define _LINUX_PM_DOMAIN_H
10
11 #include <linux/device.h>
12 #include <linux/ktime.h>
13 #include <linux/mutex.h>
14 #include <linux/pm.h>
15 #include <linux/err.h>
16 #include <linux/of.h>
17 #include <linux/notifier.h>
18 #include <linux/spinlock.h>
19 #include <linux/cpumask_types.h>
20 #include <linux/time64.h>
21
22 /*
23 * Flags to control the behaviour when attaching a device to its PM domains.
24 *
25 * PD_FLAG_NO_DEV_LINK: As the default behaviour creates a device-link
26 * for every PM domain that gets attached, this
27 * flag can be used to skip that.
28 *
29 * PD_FLAG_DEV_LINK_ON: Add the DL_FLAG_RPM_ACTIVE to power-on the
30 * supplier and its PM domain when creating the
31 * device-links.
32 *
33 * PD_FLAG_REQUIRED_OPP: Assign required_devs for the required OPPs. The
34 * index of the required OPP must correspond to the
35 * index in the array of the pd_names. If pd_names
36 * isn't specified, the index just follows the
37 * index for the attached PM domain.
38 *
39 * PD_FLAG_ATTACH_POWER_ON: Power on the domain during attach.
40 *
41 * PD_FLAG_DETACH_POWER_OFF: Power off the domain during detach.
42 *
43 */
44 #define PD_FLAG_NO_DEV_LINK BIT(0)
45 #define PD_FLAG_DEV_LINK_ON BIT(1)
46 #define PD_FLAG_REQUIRED_OPP BIT(2)
47 #define PD_FLAG_ATTACH_POWER_ON BIT(3)
48 #define PD_FLAG_DETACH_POWER_OFF BIT(4)
49
50 struct dev_pm_domain_attach_data {
51 const char * const *pd_names;
52 const u32 num_pd_names;
53 const u32 pd_flags;
54 };
55
56 struct dev_pm_domain_list {
57 struct device **pd_devs;
58 struct device_link **pd_links;
59 u32 *opp_tokens;
60 u32 num_pds;
61 };
62
63 /*
64 * Flags to control the behaviour of a genpd.
65 *
66 * These flags may be set in the struct generic_pm_domain's flags field by a
67 * genpd backend driver. The flags must be set before it calls pm_genpd_init(),
68 * which initializes a genpd.
69 *
70 * GENPD_FLAG_PM_CLK: Instructs genpd to use the PM clk framework,
71 * while powering on/off attached devices.
72 *
73 * GENPD_FLAG_IRQ_SAFE: This informs genpd that its backend callbacks,
74 * ->power_on|off(), doesn't sleep. Hence, these
75 * can be invoked from within atomic context, which
76 * enables genpd to power on/off the PM domain,
77 * even when pm_runtime_is_irq_safe() returns true,
78 * for any of its attached devices. Note that, a
79 * genpd having this flag set, requires its
80 * masterdomains to also have it set.
81 *
82 * GENPD_FLAG_ALWAYS_ON: Instructs genpd to always keep the PM domain
83 * powered on.
84 *
85 * GENPD_FLAG_ACTIVE_WAKEUP: Instructs genpd to keep the PM domain powered
86 * on, in case any of its attached devices is used
87 * in the wakeup path to serve system wakeups.
88 *
89 * GENPD_FLAG_CPU_DOMAIN: Instructs genpd that it should expect to get
90 * devices attached, which may belong to CPUs or
91 * possibly have subdomains with CPUs attached.
92 * This flag enables the genpd backend driver to
93 * deploy idle power management support for CPUs
94 * and groups of CPUs. Note that, the backend
95 * driver must then comply with the so called,
96 * last-man-standing algorithm, for the CPUs in the
97 * PM domain.
98 *
99 * GENPD_FLAG_RPM_ALWAYS_ON: Instructs genpd to always keep the PM domain
100 * powered on except for system suspend.
101 *
102 * GENPD_FLAG_MIN_RESIDENCY: Enable the genpd governor to consider its
103 * components' next wakeup when determining the
104 * optimal idle state.
105 *
106 * GENPD_FLAG_OPP_TABLE_FW: The genpd provider supports performance states,
107 * but its corresponding OPP tables are not
108 * described in DT, but are given directly by FW.
109 *
110 * GENPD_FLAG_DEV_NAME_FW: Instructs genpd to generate an unique device name
111 * using ida. It is used by genpd providers which
112 * get their genpd-names directly from FW.
113 *
114 * GENPD_FLAG_NO_SYNC_STATE: The ->sync_state() support is implemented in a
115 * genpd provider specific way, likely through a
116 * parent device node. This flag makes genpd to
117 * skip its internal support for this.
118 *
119 * GENPD_FLAG_NO_STAY_ON: For genpd OF providers a powered-on PM domain at
120 * initialization is prevented from being
121 * powered-off until the ->sync_state() callback is
122 * invoked. This flag informs genpd to allow a
123 * power-off without waiting for ->sync_state().
124 */
125 #define GENPD_FLAG_PM_CLK (1U << 0)
126 #define GENPD_FLAG_IRQ_SAFE (1U << 1)
127 #define GENPD_FLAG_ALWAYS_ON (1U << 2)
128 #define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3)
129 #define GENPD_FLAG_CPU_DOMAIN (1U << 4)
130 #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)
131 #define GENPD_FLAG_MIN_RESIDENCY (1U << 6)
132 #define GENPD_FLAG_OPP_TABLE_FW (1U << 7)
133 #define GENPD_FLAG_DEV_NAME_FW (1U << 8)
134 #define GENPD_FLAG_NO_SYNC_STATE (1U << 9)
135 #define GENPD_FLAG_NO_STAY_ON (1U << 10)
136
137 enum gpd_status {
138 GENPD_STATE_ON = 0, /* PM domain is on */
139 GENPD_STATE_OFF, /* PM domain is off */
140 };
141
142 enum genpd_notication {
143 GENPD_NOTIFY_PRE_OFF = 0,
144 GENPD_NOTIFY_OFF,
145 GENPD_NOTIFY_PRE_ON,
146 GENPD_NOTIFY_ON,
147 };
148
149 enum genpd_sync_state {
150 GENPD_SYNC_STATE_OFF = 0,
151 GENPD_SYNC_STATE_SIMPLE,
152 GENPD_SYNC_STATE_ONECELL,
153 };
154
155 struct dev_power_governor {
156 bool (*system_power_down_ok)(struct dev_pm_domain *domain);
157 bool (*power_down_ok)(struct dev_pm_domain *domain);
158 bool (*suspend_ok)(struct device *dev);
159 };
160
161 struct gpd_dev_ops {
162 int (*start)(struct device *dev);
163 int (*stop)(struct device *dev);
164 };
165
166 struct genpd_governor_data {
167 s64 max_off_time_ns;
168 bool max_off_time_changed;
169 ktime_t next_wakeup;
170 ktime_t next_hrtimer;
171 ktime_t last_enter;
172 bool reflect_residency;
173 bool cached_power_down_ok;
174 bool cached_power_down_state_idx;
175 };
176
177 struct genpd_power_state {
178 const char *name;
179 s64 power_off_latency_ns;
180 s64 power_on_latency_ns;
181 s64 residency_ns;
182 u64 usage;
183 u64 rejected;
184 u64 above;
185 u64 below;
186 struct fwnode_handle *fwnode;
187 u64 idle_time;
188 void *data;
189 };
190
191 struct genpd_lock_ops;
192 struct opp_table;
193
194 struct generic_pm_domain {
195 struct device dev;
196 struct dev_pm_domain domain; /* PM domain operations */
197 struct list_head gpd_list_node; /* Node in the global PM domains list */
198 struct list_head parent_links; /* Links with PM domain as a parent */
199 struct list_head child_links; /* Links with PM domain as a child */
200 struct list_head dev_list; /* List of devices */
201 struct dev_power_governor *gov;
202 struct genpd_governor_data *gd; /* Data used by a genpd governor. */
203 struct work_struct power_off_work;
204 struct fwnode_handle *provider; /* Identity of the domain provider */
205 bool has_provider;
206 const char *name;
207 atomic_t sd_count; /* Number of subdomains with power "on" */
208 enum gpd_status status; /* Current state of the domain */
209 unsigned int device_count; /* Number of devices */
210 unsigned int device_id; /* unique device id */
211 unsigned int suspended_count; /* System suspend device counter */
212 unsigned int prepared_count; /* Suspend counter of prepared devices */
213 unsigned int performance_state; /* Aggregated max performance state */
214 cpumask_var_t cpus; /* A cpumask of the attached CPUs */
215 bool synced_poweroff; /* A consumer needs a synced poweroff */
216 bool stay_on; /* Stay powered-on during boot. */
217 enum genpd_sync_state sync_state; /* How sync_state is managed. */
218 int (*power_off)(struct generic_pm_domain *domain);
219 int (*power_on)(struct generic_pm_domain *domain);
220 struct raw_notifier_head power_notifiers; /* Power on/off notifiers */
221 struct opp_table *opp_table; /* OPP table of the genpd */
222 int (*set_performance_state)(struct generic_pm_domain *genpd,
223 unsigned int state);
224 struct gpd_dev_ops dev_ops;
225 int (*set_hwmode_dev)(struct generic_pm_domain *domain,
226 struct device *dev, bool enable);
227 bool (*get_hwmode_dev)(struct generic_pm_domain *domain,
228 struct device *dev);
229 int (*attach_dev)(struct generic_pm_domain *domain,
230 struct device *dev);
231 void (*detach_dev)(struct generic_pm_domain *domain,
232 struct device *dev);
233 unsigned int flags; /* Bit field of configs for genpd */
234 struct genpd_power_state *states;
235 void (*free_states)(struct genpd_power_state *states,
236 unsigned int state_count);
237 unsigned int state_count; /* number of states */
238 unsigned int state_idx; /* state that genpd will go to when off */
239 u64 on_time;
240 u64 accounting_time;
241 const struct genpd_lock_ops *lock_ops;
242 union {
243 struct mutex mlock;
244 struct {
245 spinlock_t slock;
246 unsigned long lock_flags;
247 };
248 struct {
249 raw_spinlock_t raw_slock;
250 unsigned long raw_lock_flags;
251 };
252 };
253 };
254
pd_to_genpd(struct dev_pm_domain * pd)255 static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
256 {
257 return container_of(pd, struct generic_pm_domain, domain);
258 }
259
260 struct gpd_link {
261 struct generic_pm_domain *parent;
262 struct list_head parent_node;
263 struct generic_pm_domain *child;
264 struct list_head child_node;
265
266 /* Sub-domain's per-master domain performance state */
267 unsigned int performance_state;
268 unsigned int prev_performance_state;
269 };
270
271 struct gpd_timing_data {
272 s64 suspend_latency_ns;
273 s64 resume_latency_ns;
274 s64 effective_constraint_ns;
275 ktime_t next_wakeup;
276 bool constraint_changed;
277 bool cached_suspend_ok;
278 };
279
280 struct pm_domain_data {
281 struct list_head list_node;
282 struct device *dev;
283 };
284
285 struct generic_pm_domain_data {
286 struct pm_domain_data base;
287 struct gpd_timing_data *td;
288 struct notifier_block nb;
289 struct notifier_block *power_nb;
290 int cpu;
291 unsigned int performance_state;
292 unsigned int default_pstate;
293 unsigned int rpm_pstate;
294 unsigned int opp_token;
295 bool hw_mode;
296 bool rpm_always_on;
297 void *data;
298 };
299
300 #ifdef CONFIG_PM_GENERIC_DOMAINS
to_gpd_data(struct pm_domain_data * pdd)301 static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
302 {
303 return container_of(pdd, struct generic_pm_domain_data, base);
304 }
305
dev_gpd_data(struct device * dev)306 static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
307 {
308 return to_gpd_data(dev->power.subsys_data->domain_data);
309 }
310
311 int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev);
312 int pm_genpd_remove_device(struct device *dev);
313 int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
314 struct generic_pm_domain *subdomain);
315 int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
316 struct generic_pm_domain *subdomain);
317 int pm_genpd_init(struct generic_pm_domain *genpd,
318 struct dev_power_governor *gov, bool is_off);
319 int pm_genpd_remove(struct generic_pm_domain *genpd);
320 void pm_genpd_inc_rejected(struct generic_pm_domain *genpd,
321 unsigned int state_idx);
322 struct device *dev_to_genpd_dev(struct device *dev);
323 int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);
324 int dev_pm_genpd_add_notifier(struct device *dev, struct notifier_block *nb);
325 int dev_pm_genpd_remove_notifier(struct device *dev);
326 void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next);
327 ktime_t dev_pm_genpd_get_next_hrtimer(struct device *dev);
328 void dev_pm_genpd_synced_poweroff(struct device *dev);
329 int dev_pm_genpd_set_hwmode(struct device *dev, bool enable);
330 bool dev_pm_genpd_get_hwmode(struct device *dev);
331 int dev_pm_genpd_rpm_always_on(struct device *dev, bool on);
332 bool dev_pm_genpd_is_on(struct device *dev);
333
334 extern struct dev_power_governor simple_qos_governor;
335 extern struct dev_power_governor pm_domain_always_on_gov;
336 #ifdef CONFIG_CPU_IDLE
337 extern struct dev_power_governor pm_domain_cpu_gov;
338 #endif
339 #else
340
dev_gpd_data(struct device * dev)341 static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
342 {
343 return ERR_PTR(-ENOSYS);
344 }
pm_genpd_add_device(struct generic_pm_domain * genpd,struct device * dev)345 static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
346 struct device *dev)
347 {
348 return -ENOSYS;
349 }
pm_genpd_remove_device(struct device * dev)350 static inline int pm_genpd_remove_device(struct device *dev)
351 {
352 return -ENOSYS;
353 }
pm_genpd_add_subdomain(struct generic_pm_domain * genpd,struct generic_pm_domain * subdomain)354 static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
355 struct generic_pm_domain *subdomain)
356 {
357 return -ENOSYS;
358 }
pm_genpd_remove_subdomain(struct generic_pm_domain * genpd,struct generic_pm_domain * subdomain)359 static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
360 struct generic_pm_domain *subdomain)
361 {
362 return -ENOSYS;
363 }
pm_genpd_init(struct generic_pm_domain * genpd,struct dev_power_governor * gov,bool is_off)364 static inline int pm_genpd_init(struct generic_pm_domain *genpd,
365 struct dev_power_governor *gov, bool is_off)
366 {
367 return -ENOSYS;
368 }
pm_genpd_remove(struct generic_pm_domain * genpd)369 static inline int pm_genpd_remove(struct generic_pm_domain *genpd)
370 {
371 return -EOPNOTSUPP;
372 }
373
pm_genpd_inc_rejected(struct generic_pm_domain * genpd,unsigned int state_idx)374 static inline void pm_genpd_inc_rejected(struct generic_pm_domain *genpd,
375 unsigned int state_idx)
376 { }
377
dev_to_genpd_dev(struct device * dev)378 static inline struct device *dev_to_genpd_dev(struct device *dev)
379 {
380 return ERR_PTR(-EOPNOTSUPP);
381 }
382
dev_pm_genpd_set_performance_state(struct device * dev,unsigned int state)383 static inline int dev_pm_genpd_set_performance_state(struct device *dev,
384 unsigned int state)
385 {
386 return -EOPNOTSUPP;
387 }
388
dev_pm_genpd_add_notifier(struct device * dev,struct notifier_block * nb)389 static inline int dev_pm_genpd_add_notifier(struct device *dev,
390 struct notifier_block *nb)
391 {
392 return -EOPNOTSUPP;
393 }
394
dev_pm_genpd_remove_notifier(struct device * dev)395 static inline int dev_pm_genpd_remove_notifier(struct device *dev)
396 {
397 return -EOPNOTSUPP;
398 }
399
dev_pm_genpd_set_next_wakeup(struct device * dev,ktime_t next)400 static inline void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next)
401 { }
402
dev_pm_genpd_get_next_hrtimer(struct device * dev)403 static inline ktime_t dev_pm_genpd_get_next_hrtimer(struct device *dev)
404 {
405 return KTIME_MAX;
406 }
dev_pm_genpd_synced_poweroff(struct device * dev)407 static inline void dev_pm_genpd_synced_poweroff(struct device *dev)
408 { }
409
dev_pm_genpd_set_hwmode(struct device * dev,bool enable)410 static inline int dev_pm_genpd_set_hwmode(struct device *dev, bool enable)
411 {
412 return -EOPNOTSUPP;
413 }
414
dev_pm_genpd_get_hwmode(struct device * dev)415 static inline bool dev_pm_genpd_get_hwmode(struct device *dev)
416 {
417 return false;
418 }
419
dev_pm_genpd_rpm_always_on(struct device * dev,bool on)420 static inline int dev_pm_genpd_rpm_always_on(struct device *dev, bool on)
421 {
422 return -EOPNOTSUPP;
423 }
424
dev_pm_genpd_is_on(struct device * dev)425 static inline bool dev_pm_genpd_is_on(struct device *dev)
426 {
427 return false;
428 }
429
430 #define simple_qos_governor (*(struct dev_power_governor *)(NULL))
431 #define pm_domain_always_on_gov (*(struct dev_power_governor *)(NULL))
432 #endif
433
434 #ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
435 void dev_pm_genpd_suspend(struct device *dev);
436 void dev_pm_genpd_resume(struct device *dev);
437 #else
dev_pm_genpd_suspend(struct device * dev)438 static inline void dev_pm_genpd_suspend(struct device *dev) {}
dev_pm_genpd_resume(struct device * dev)439 static inline void dev_pm_genpd_resume(struct device *dev) {}
440 #endif
441
442 /* OF PM domain providers */
443 struct of_device_id;
444
445 typedef struct generic_pm_domain *(*genpd_xlate_t)(const struct of_phandle_args *args,
446 void *data);
447
448 struct genpd_onecell_data {
449 struct generic_pm_domain **domains;
450 unsigned int num_domains;
451 genpd_xlate_t xlate;
452 };
453
454 #ifdef CONFIG_PM_GENERIC_DOMAINS_OF
455 int of_genpd_add_provider_simple(struct device_node *np,
456 struct generic_pm_domain *genpd);
457 int of_genpd_add_provider_onecell(struct device_node *np,
458 struct genpd_onecell_data *data);
459 void of_genpd_del_provider(struct device_node *np);
460 int of_genpd_add_device(const struct of_phandle_args *args, struct device *dev);
461 int of_genpd_add_subdomain(const struct of_phandle_args *parent_spec,
462 const struct of_phandle_args *subdomain_spec);
463 int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec,
464 const struct of_phandle_args *subdomain_spec);
465 struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
466 int of_genpd_parse_idle_states(struct device_node *dn,
467 struct genpd_power_state **states, int *n);
468 void of_genpd_sync_state(struct device_node *np);
469
470 int genpd_dev_pm_attach(struct device *dev);
471 struct device *genpd_dev_pm_attach_by_id(struct device *dev,
472 unsigned int index);
473 struct device *genpd_dev_pm_attach_by_name(struct device *dev,
474 const char *name);
475 #else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
of_genpd_add_provider_simple(struct device_node * np,struct generic_pm_domain * genpd)476 static inline int of_genpd_add_provider_simple(struct device_node *np,
477 struct generic_pm_domain *genpd)
478 {
479 return -EOPNOTSUPP;
480 }
481
of_genpd_add_provider_onecell(struct device_node * np,struct genpd_onecell_data * data)482 static inline int of_genpd_add_provider_onecell(struct device_node *np,
483 struct genpd_onecell_data *data)
484 {
485 return -EOPNOTSUPP;
486 }
487
of_genpd_del_provider(struct device_node * np)488 static inline void of_genpd_del_provider(struct device_node *np) {}
489
of_genpd_add_device(const struct of_phandle_args * args,struct device * dev)490 static inline int of_genpd_add_device(const struct of_phandle_args *args,
491 struct device *dev)
492 {
493 return -ENODEV;
494 }
495
of_genpd_add_subdomain(const struct of_phandle_args * parent_spec,const struct of_phandle_args * subdomain_spec)496 static inline int of_genpd_add_subdomain(const struct of_phandle_args *parent_spec,
497 const struct of_phandle_args *subdomain_spec)
498 {
499 return -ENODEV;
500 }
501
of_genpd_remove_subdomain(const struct of_phandle_args * parent_spec,const struct of_phandle_args * subdomain_spec)502 static inline int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec,
503 const struct of_phandle_args *subdomain_spec)
504 {
505 return -ENODEV;
506 }
507
of_genpd_parse_idle_states(struct device_node * dn,struct genpd_power_state ** states,int * n)508 static inline int of_genpd_parse_idle_states(struct device_node *dn,
509 struct genpd_power_state **states, int *n)
510 {
511 return -ENODEV;
512 }
513
of_genpd_sync_state(struct device_node * np)514 static inline void of_genpd_sync_state(struct device_node *np) {}
515
genpd_dev_pm_attach(struct device * dev)516 static inline int genpd_dev_pm_attach(struct device *dev)
517 {
518 return 0;
519 }
520
genpd_dev_pm_attach_by_id(struct device * dev,unsigned int index)521 static inline struct device *genpd_dev_pm_attach_by_id(struct device *dev,
522 unsigned int index)
523 {
524 return NULL;
525 }
526
genpd_dev_pm_attach_by_name(struct device * dev,const char * name)527 static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev,
528 const char *name)
529 {
530 return NULL;
531 }
532
533 static inline
of_genpd_remove_last(struct device_node * np)534 struct generic_pm_domain *of_genpd_remove_last(struct device_node *np)
535 {
536 return ERR_PTR(-EOPNOTSUPP);
537 }
538 #endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
539
540 #ifdef CONFIG_PM
541 int dev_pm_domain_attach(struct device *dev, u32 flags);
542 struct device *dev_pm_domain_attach_by_id(struct device *dev,
543 unsigned int index);
544 struct device *dev_pm_domain_attach_by_name(struct device *dev,
545 const char *name);
546 int dev_pm_domain_attach_list(struct device *dev,
547 const struct dev_pm_domain_attach_data *data,
548 struct dev_pm_domain_list **list);
549 int devm_pm_domain_attach_list(struct device *dev,
550 const struct dev_pm_domain_attach_data *data,
551 struct dev_pm_domain_list **list);
552 void dev_pm_domain_detach(struct device *dev, bool power_off);
553 void dev_pm_domain_detach_list(struct dev_pm_domain_list *list);
554 int dev_pm_domain_start(struct device *dev);
555 void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
556 int dev_pm_domain_set_performance_state(struct device *dev, unsigned int state);
557 #else
dev_pm_domain_attach(struct device * dev,u32 flags)558 static inline int dev_pm_domain_attach(struct device *dev, u32 flags)
559 {
560 return 0;
561 }
dev_pm_domain_attach_by_id(struct device * dev,unsigned int index)562 static inline struct device *dev_pm_domain_attach_by_id(struct device *dev,
563 unsigned int index)
564 {
565 return NULL;
566 }
dev_pm_domain_attach_by_name(struct device * dev,const char * name)567 static inline struct device *dev_pm_domain_attach_by_name(struct device *dev,
568 const char *name)
569 {
570 return NULL;
571 }
dev_pm_domain_attach_list(struct device * dev,const struct dev_pm_domain_attach_data * data,struct dev_pm_domain_list ** list)572 static inline int dev_pm_domain_attach_list(struct device *dev,
573 const struct dev_pm_domain_attach_data *data,
574 struct dev_pm_domain_list **list)
575 {
576 return 0;
577 }
578
devm_pm_domain_attach_list(struct device * dev,const struct dev_pm_domain_attach_data * data,struct dev_pm_domain_list ** list)579 static inline int devm_pm_domain_attach_list(struct device *dev,
580 const struct dev_pm_domain_attach_data *data,
581 struct dev_pm_domain_list **list)
582 {
583 return 0;
584 }
585
dev_pm_domain_detach(struct device * dev,bool power_off)586 static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
dev_pm_domain_detach_list(struct dev_pm_domain_list * list)587 static inline void dev_pm_domain_detach_list(struct dev_pm_domain_list *list) {}
dev_pm_domain_start(struct device * dev)588 static inline int dev_pm_domain_start(struct device *dev)
589 {
590 return 0;
591 }
dev_pm_domain_set(struct device * dev,struct dev_pm_domain * pd)592 static inline void dev_pm_domain_set(struct device *dev,
593 struct dev_pm_domain *pd) {}
dev_pm_domain_set_performance_state(struct device * dev,unsigned int state)594 static inline int dev_pm_domain_set_performance_state(struct device *dev,
595 unsigned int state)
596 {
597 return 0;
598 }
599 #endif
600
601 #endif /* _LINUX_PM_DOMAIN_H */
602