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1 | /* |
2 | * pm_runtime.h - Device run-time power management helper functions. |
3 | * |
4 | * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl> |
5 | * |
6 | * This file is released under the GPLv2. |
7 | */ |
8 | |
9 | #ifndef _LINUX_PM_RUNTIME_H |
10 | #define _LINUX_PM_RUNTIME_H |
11 | |
12 | #include <linux/device.h> |
13 | #include <linux/pm.h> |
14 | |
15 | #include <linux/jiffies.h> |
16 | |
17 | /* Runtime PM flag argument bits */ |
18 | #define RPM_ASYNC 0x01 /* Request is asynchronous */ |
19 | #define RPM_NOWAIT 0x02 /* Don't wait for concurrent |
20 | state change */ |
21 | #define RPM_GET_PUT 0x04 /* Increment/decrement the |
22 | usage_count */ |
23 | #define RPM_AUTO 0x08 /* Use autosuspend_delay */ |
24 | |
25 | #ifdef CONFIG_PM_RUNTIME |
26 | |
27 | extern struct workqueue_struct *pm_wq; |
28 | |
29 | extern int __pm_runtime_idle(struct device *dev, int rpmflags); |
30 | extern int __pm_runtime_suspend(struct device *dev, int rpmflags); |
31 | extern int __pm_runtime_resume(struct device *dev, int rpmflags); |
32 | extern int pm_schedule_suspend(struct device *dev, unsigned int delay); |
33 | extern int __pm_runtime_set_status(struct device *dev, unsigned int status); |
34 | extern int pm_runtime_barrier(struct device *dev); |
35 | extern void pm_runtime_enable(struct device *dev); |
36 | extern void __pm_runtime_disable(struct device *dev, bool check_resume); |
37 | extern void pm_runtime_allow(struct device *dev); |
38 | extern void pm_runtime_forbid(struct device *dev); |
39 | extern int pm_generic_runtime_idle(struct device *dev); |
40 | extern int pm_generic_runtime_suspend(struct device *dev); |
41 | extern int pm_generic_runtime_resume(struct device *dev); |
42 | extern void pm_runtime_no_callbacks(struct device *dev); |
43 | extern void pm_runtime_irq_safe(struct device *dev); |
44 | extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); |
45 | extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); |
46 | extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev); |
47 | |
48 | static inline bool pm_children_suspended(struct device *dev) |
49 | { |
50 | return dev->power.ignore_children |
51 | || !atomic_read(&dev->power.child_count); |
52 | } |
53 | |
54 | static inline void pm_suspend_ignore_children(struct device *dev, bool enable) |
55 | { |
56 | dev->power.ignore_children = enable; |
57 | } |
58 | |
59 | static inline void pm_runtime_get_noresume(struct device *dev) |
60 | { |
61 | atomic_inc(&dev->power.usage_count); |
62 | } |
63 | |
64 | static inline void pm_runtime_put_noidle(struct device *dev) |
65 | { |
66 | atomic_add_unless(&dev->power.usage_count, -1, 0); |
67 | } |
68 | |
69 | static inline bool device_run_wake(struct device *dev) |
70 | { |
71 | return dev->power.run_wake; |
72 | } |
73 | |
74 | static inline void device_set_run_wake(struct device *dev, bool enable) |
75 | { |
76 | dev->power.run_wake = enable; |
77 | } |
78 | |
79 | static inline bool pm_runtime_suspended(struct device *dev) |
80 | { |
81 | return dev->power.runtime_status == RPM_SUSPENDED |
82 | && !dev->power.disable_depth; |
83 | } |
84 | |
85 | static inline bool pm_runtime_enabled(struct device *dev) |
86 | { |
87 | return !dev->power.disable_depth; |
88 | } |
89 | |
90 | static inline bool pm_runtime_callbacks_present(struct device *dev) |
91 | { |
92 | return !dev->power.no_callbacks; |
93 | } |
94 | |
95 | static inline void pm_runtime_mark_last_busy(struct device *dev) |
96 | { |
97 | ACCESS_ONCE(dev->power.last_busy) = jiffies; |
98 | } |
99 | |
100 | #else /* !CONFIG_PM_RUNTIME */ |
101 | |
102 | static inline int __pm_runtime_idle(struct device *dev, int rpmflags) |
103 | { |
104 | return -ENOSYS; |
105 | } |
106 | static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) |
107 | { |
108 | return -ENOSYS; |
109 | } |
110 | static inline int __pm_runtime_resume(struct device *dev, int rpmflags) |
111 | { |
112 | return 1; |
113 | } |
114 | static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) |
115 | { |
116 | return -ENOSYS; |
117 | } |
118 | static inline int __pm_runtime_set_status(struct device *dev, |
119 | unsigned int status) { return 0; } |
120 | static inline int pm_runtime_barrier(struct device *dev) { return 0; } |
121 | static inline void pm_runtime_enable(struct device *dev) {} |
122 | static inline void __pm_runtime_disable(struct device *dev, bool c) {} |
123 | static inline void pm_runtime_allow(struct device *dev) {} |
124 | static inline void pm_runtime_forbid(struct device *dev) {} |
125 | |
126 | static inline bool pm_children_suspended(struct device *dev) { return false; } |
127 | static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} |
128 | static inline void pm_runtime_get_noresume(struct device *dev) {} |
129 | static inline void pm_runtime_put_noidle(struct device *dev) {} |
130 | static inline bool device_run_wake(struct device *dev) { return false; } |
131 | static inline void device_set_run_wake(struct device *dev, bool enable) {} |
132 | static inline bool pm_runtime_suspended(struct device *dev) { return false; } |
133 | static inline bool pm_runtime_enabled(struct device *dev) { return false; } |
134 | |
135 | static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } |
136 | static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } |
137 | static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } |
138 | static inline void pm_runtime_no_callbacks(struct device *dev) {} |
139 | static inline void pm_runtime_irq_safe(struct device *dev) {} |
140 | |
141 | static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } |
142 | static inline void pm_runtime_mark_last_busy(struct device *dev) {} |
143 | static inline void __pm_runtime_use_autosuspend(struct device *dev, |
144 | bool use) {} |
145 | static inline void pm_runtime_set_autosuspend_delay(struct device *dev, |
146 | int delay) {} |
147 | static inline unsigned long pm_runtime_autosuspend_expiration( |
148 | struct device *dev) { return 0; } |
149 | |
150 | #endif /* !CONFIG_PM_RUNTIME */ |
151 | |
152 | static inline int pm_runtime_idle(struct device *dev) |
153 | { |
154 | return __pm_runtime_idle(dev, 0); |
155 | } |
156 | |
157 | static inline int pm_runtime_suspend(struct device *dev) |
158 | { |
159 | return __pm_runtime_suspend(dev, 0); |
160 | } |
161 | |
162 | static inline int pm_runtime_autosuspend(struct device *dev) |
163 | { |
164 | return __pm_runtime_suspend(dev, RPM_AUTO); |
165 | } |
166 | |
167 | static inline int pm_runtime_resume(struct device *dev) |
168 | { |
169 | return __pm_runtime_resume(dev, 0); |
170 | } |
171 | |
172 | static inline int pm_request_idle(struct device *dev) |
173 | { |
174 | return __pm_runtime_idle(dev, RPM_ASYNC); |
175 | } |
176 | |
177 | static inline int pm_request_resume(struct device *dev) |
178 | { |
179 | return __pm_runtime_resume(dev, RPM_ASYNC); |
180 | } |
181 | |
182 | static inline int pm_request_autosuspend(struct device *dev) |
183 | { |
184 | return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); |
185 | } |
186 | |
187 | static inline int pm_runtime_get(struct device *dev) |
188 | { |
189 | return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); |
190 | } |
191 | |
192 | static inline int pm_runtime_get_sync(struct device *dev) |
193 | { |
194 | return __pm_runtime_resume(dev, RPM_GET_PUT); |
195 | } |
196 | |
197 | static inline int pm_runtime_put(struct device *dev) |
198 | { |
199 | return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); |
200 | } |
201 | |
202 | static inline int pm_runtime_put_autosuspend(struct device *dev) |
203 | { |
204 | return __pm_runtime_suspend(dev, |
205 | RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); |
206 | } |
207 | |
208 | static inline int pm_runtime_put_sync(struct device *dev) |
209 | { |
210 | return __pm_runtime_idle(dev, RPM_GET_PUT); |
211 | } |
212 | |
213 | static inline int pm_runtime_put_sync_suspend(struct device *dev) |
214 | { |
215 | return __pm_runtime_suspend(dev, RPM_GET_PUT); |
216 | } |
217 | |
218 | static inline int pm_runtime_put_sync_autosuspend(struct device *dev) |
219 | { |
220 | return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); |
221 | } |
222 | |
223 | static inline int pm_runtime_set_active(struct device *dev) |
224 | { |
225 | return __pm_runtime_set_status(dev, RPM_ACTIVE); |
226 | } |
227 | |
228 | static inline void pm_runtime_set_suspended(struct device *dev) |
229 | { |
230 | __pm_runtime_set_status(dev, RPM_SUSPENDED); |
231 | } |
232 | |
233 | static inline void pm_runtime_disable(struct device *dev) |
234 | { |
235 | __pm_runtime_disable(dev, true); |
236 | } |
237 | |
238 | static inline void pm_runtime_use_autosuspend(struct device *dev) |
239 | { |
240 | __pm_runtime_use_autosuspend(dev, true); |
241 | } |
242 | |
243 | static inline void pm_runtime_dont_use_autosuspend(struct device *dev) |
244 | { |
245 | __pm_runtime_use_autosuspend(dev, false); |
246 | } |
247 | |
248 | struct pm_clk_notifier_block { |
249 | struct notifier_block nb; |
250 | struct dev_power_domain *pwr_domain; |
251 | char *con_ids[]; |
252 | }; |
253 | |
254 | #ifdef CONFIG_PM_RUNTIME_CLK |
255 | extern int pm_runtime_clk_init(struct device *dev); |
256 | extern void pm_runtime_clk_destroy(struct device *dev); |
257 | extern int pm_runtime_clk_add(struct device *dev, const char *con_id); |
258 | extern void pm_runtime_clk_remove(struct device *dev, const char *con_id); |
259 | extern int pm_runtime_clk_suspend(struct device *dev); |
260 | extern int pm_runtime_clk_resume(struct device *dev); |
261 | #else |
262 | static inline int pm_runtime_clk_init(struct device *dev) |
263 | { |
264 | return -EINVAL; |
265 | } |
266 | static inline void pm_runtime_clk_destroy(struct device *dev) |
267 | { |
268 | } |
269 | static inline int pm_runtime_clk_add(struct device *dev, const char *con_id) |
270 | { |
271 | return -EINVAL; |
272 | } |
273 | static inline void pm_runtime_clk_remove(struct device *dev, const char *con_id) |
274 | { |
275 | } |
276 | #define pm_runtime_clock_suspend NULL |
277 | #define pm_runtime_clock_resume NULL |
278 | #endif |
279 | |
280 | #ifdef CONFIG_HAVE_CLK |
281 | extern void pm_runtime_clk_add_notifier(struct bus_type *bus, |
282 | struct pm_clk_notifier_block *clknb); |
283 | #else |
284 | static inline void pm_runtime_clk_add_notifier(struct bus_type *bus, |
285 | struct pm_clk_notifier_block *clknb) |
286 | { |
287 | } |
288 | #endif |
289 | |
290 | #endif |
291 |
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