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3f23de10 SR |
1 | /* |
2 | * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. | |
3 | * <benh@kernel.crashing.org> | |
4 | * and Arnd Bergmann, IBM Corp. | |
5 | * Merged from powerpc/kernel/of_platform.c and | |
6 | * sparc{,64}/kernel/of_device.c by Stephen Rothwell | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | * | |
13 | */ | |
14 | #include <linux/errno.h> | |
5c457083 | 15 | #include <linux/module.h> |
3f23de10 SR |
16 | #include <linux/device.h> |
17 | #include <linux/of_device.h> | |
18 | #include <linux/of_platform.h> | |
19 | ||
140b932f OH |
20 | extern struct device_attribute of_platform_device_attrs[]; |
21 | ||
3f23de10 SR |
22 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) |
23 | { | |
597b9d1e | 24 | const struct of_device_id *matches = drv->of_match_table; |
3f23de10 SR |
25 | |
26 | if (!matches) | |
27 | return 0; | |
28 | ||
44504b2b | 29 | return of_match_device(matches, dev) != NULL; |
3f23de10 SR |
30 | } |
31 | ||
32 | static int of_platform_device_probe(struct device *dev) | |
33 | { | |
34 | int error = -ENODEV; | |
35 | struct of_platform_driver *drv; | |
36 | struct of_device *of_dev; | |
37 | const struct of_device_id *match; | |
38 | ||
39 | drv = to_of_platform_driver(dev->driver); | |
40 | of_dev = to_of_device(dev); | |
41 | ||
42 | if (!drv->probe) | |
43 | return error; | |
44 | ||
45 | of_dev_get(of_dev); | |
46 | ||
44504b2b | 47 | match = of_match_device(drv->driver.of_match_table, dev); |
3f23de10 SR |
48 | if (match) |
49 | error = drv->probe(of_dev, match); | |
50 | if (error) | |
51 | of_dev_put(of_dev); | |
52 | ||
53 | return error; | |
54 | } | |
55 | ||
56 | static int of_platform_device_remove(struct device *dev) | |
57 | { | |
58 | struct of_device *of_dev = to_of_device(dev); | |
59 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
60 | ||
61 | if (dev->driver && drv->remove) | |
62 | drv->remove(of_dev); | |
63 | return 0; | |
64 | } | |
65 | ||
d35ef90b | 66 | static void of_platform_device_shutdown(struct device *dev) |
3f23de10 SR |
67 | { |
68 | struct of_device *of_dev = to_of_device(dev); | |
69 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
3f23de10 | 70 | |
d35ef90b AV |
71 | if (dev->driver && drv->shutdown) |
72 | drv->shutdown(of_dev); | |
3f23de10 SR |
73 | } |
74 | ||
d35ef90b AV |
75 | #ifdef CONFIG_PM_SLEEP |
76 | ||
77 | static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
3f23de10 SR |
78 | { |
79 | struct of_device *of_dev = to_of_device(dev); | |
80 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 81 | int ret = 0; |
3f23de10 | 82 | |
d35ef90b AV |
83 | if (dev->driver && drv->suspend) |
84 | ret = drv->suspend(of_dev, mesg); | |
85 | return ret; | |
3f23de10 SR |
86 | } |
87 | ||
d35ef90b | 88 | static int of_platform_legacy_resume(struct device *dev) |
a09ad3c4 ME |
89 | { |
90 | struct of_device *of_dev = to_of_device(dev); | |
91 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 92 | int ret = 0; |
a09ad3c4 | 93 | |
d35ef90b AV |
94 | if (dev->driver && drv->resume) |
95 | ret = drv->resume(of_dev); | |
96 | return ret; | |
97 | } | |
98 | ||
99 | static int of_platform_pm_prepare(struct device *dev) | |
100 | { | |
101 | struct device_driver *drv = dev->driver; | |
102 | int ret = 0; | |
103 | ||
104 | if (drv && drv->pm && drv->pm->prepare) | |
105 | ret = drv->pm->prepare(dev); | |
106 | ||
107 | return ret; | |
108 | } | |
109 | ||
110 | static void of_platform_pm_complete(struct device *dev) | |
111 | { | |
112 | struct device_driver *drv = dev->driver; | |
113 | ||
114 | if (drv && drv->pm && drv->pm->complete) | |
115 | drv->pm->complete(dev); | |
116 | } | |
117 | ||
118 | #ifdef CONFIG_SUSPEND | |
119 | ||
120 | static int of_platform_pm_suspend(struct device *dev) | |
121 | { | |
122 | struct device_driver *drv = dev->driver; | |
123 | int ret = 0; | |
124 | ||
125 | if (!drv) | |
126 | return 0; | |
127 | ||
128 | if (drv->pm) { | |
129 | if (drv->pm->suspend) | |
130 | ret = drv->pm->suspend(dev); | |
131 | } else { | |
132 | ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND); | |
133 | } | |
134 | ||
135 | return ret; | |
a09ad3c4 ME |
136 | } |
137 | ||
d35ef90b AV |
138 | static int of_platform_pm_suspend_noirq(struct device *dev) |
139 | { | |
140 | struct device_driver *drv = dev->driver; | |
141 | int ret = 0; | |
142 | ||
143 | if (!drv) | |
144 | return 0; | |
145 | ||
146 | if (drv->pm) { | |
147 | if (drv->pm->suspend_noirq) | |
148 | ret = drv->pm->suspend_noirq(dev); | |
149 | } | |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
154 | static int of_platform_pm_resume(struct device *dev) | |
155 | { | |
156 | struct device_driver *drv = dev->driver; | |
157 | int ret = 0; | |
158 | ||
159 | if (!drv) | |
160 | return 0; | |
161 | ||
162 | if (drv->pm) { | |
163 | if (drv->pm->resume) | |
164 | ret = drv->pm->resume(dev); | |
165 | } else { | |
166 | ret = of_platform_legacy_resume(dev); | |
167 | } | |
168 | ||
169 | return ret; | |
170 | } | |
171 | ||
172 | static int of_platform_pm_resume_noirq(struct device *dev) | |
173 | { | |
174 | struct device_driver *drv = dev->driver; | |
175 | int ret = 0; | |
176 | ||
177 | if (!drv) | |
178 | return 0; | |
179 | ||
180 | if (drv->pm) { | |
181 | if (drv->pm->resume_noirq) | |
182 | ret = drv->pm->resume_noirq(dev); | |
183 | } | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
188 | #else /* !CONFIG_SUSPEND */ | |
189 | ||
190 | #define of_platform_pm_suspend NULL | |
191 | #define of_platform_pm_resume NULL | |
192 | #define of_platform_pm_suspend_noirq NULL | |
193 | #define of_platform_pm_resume_noirq NULL | |
194 | ||
195 | #endif /* !CONFIG_SUSPEND */ | |
196 | ||
197 | #ifdef CONFIG_HIBERNATION | |
198 | ||
199 | static int of_platform_pm_freeze(struct device *dev) | |
200 | { | |
201 | struct device_driver *drv = dev->driver; | |
202 | int ret = 0; | |
203 | ||
204 | if (!drv) | |
205 | return 0; | |
206 | ||
207 | if (drv->pm) { | |
208 | if (drv->pm->freeze) | |
209 | ret = drv->pm->freeze(dev); | |
210 | } else { | |
211 | ret = of_platform_legacy_suspend(dev, PMSG_FREEZE); | |
212 | } | |
213 | ||
214 | return ret; | |
215 | } | |
216 | ||
217 | static int of_platform_pm_freeze_noirq(struct device *dev) | |
218 | { | |
219 | struct device_driver *drv = dev->driver; | |
220 | int ret = 0; | |
221 | ||
222 | if (!drv) | |
223 | return 0; | |
224 | ||
225 | if (drv->pm) { | |
226 | if (drv->pm->freeze_noirq) | |
227 | ret = drv->pm->freeze_noirq(dev); | |
228 | } | |
229 | ||
230 | return ret; | |
231 | } | |
232 | ||
233 | static int of_platform_pm_thaw(struct device *dev) | |
234 | { | |
235 | struct device_driver *drv = dev->driver; | |
236 | int ret = 0; | |
237 | ||
238 | if (!drv) | |
239 | return 0; | |
240 | ||
241 | if (drv->pm) { | |
242 | if (drv->pm->thaw) | |
243 | ret = drv->pm->thaw(dev); | |
244 | } else { | |
245 | ret = of_platform_legacy_resume(dev); | |
246 | } | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
251 | static int of_platform_pm_thaw_noirq(struct device *dev) | |
252 | { | |
253 | struct device_driver *drv = dev->driver; | |
254 | int ret = 0; | |
255 | ||
256 | if (!drv) | |
257 | return 0; | |
258 | ||
259 | if (drv->pm) { | |
260 | if (drv->pm->thaw_noirq) | |
261 | ret = drv->pm->thaw_noirq(dev); | |
262 | } | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
267 | static int of_platform_pm_poweroff(struct device *dev) | |
268 | { | |
269 | struct device_driver *drv = dev->driver; | |
270 | int ret = 0; | |
271 | ||
272 | if (!drv) | |
273 | return 0; | |
274 | ||
275 | if (drv->pm) { | |
276 | if (drv->pm->poweroff) | |
277 | ret = drv->pm->poweroff(dev); | |
278 | } else { | |
279 | ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
280 | } | |
281 | ||
282 | return ret; | |
283 | } | |
284 | ||
285 | static int of_platform_pm_poweroff_noirq(struct device *dev) | |
286 | { | |
287 | struct device_driver *drv = dev->driver; | |
288 | int ret = 0; | |
289 | ||
290 | if (!drv) | |
291 | return 0; | |
292 | ||
293 | if (drv->pm) { | |
294 | if (drv->pm->poweroff_noirq) | |
295 | ret = drv->pm->poweroff_noirq(dev); | |
296 | } | |
297 | ||
298 | return ret; | |
299 | } | |
300 | ||
301 | static int of_platform_pm_restore(struct device *dev) | |
302 | { | |
303 | struct device_driver *drv = dev->driver; | |
304 | int ret = 0; | |
305 | ||
306 | if (!drv) | |
307 | return 0; | |
308 | ||
309 | if (drv->pm) { | |
310 | if (drv->pm->restore) | |
311 | ret = drv->pm->restore(dev); | |
312 | } else { | |
313 | ret = of_platform_legacy_resume(dev); | |
314 | } | |
315 | ||
316 | return ret; | |
317 | } | |
318 | ||
319 | static int of_platform_pm_restore_noirq(struct device *dev) | |
320 | { | |
321 | struct device_driver *drv = dev->driver; | |
322 | int ret = 0; | |
323 | ||
324 | if (!drv) | |
325 | return 0; | |
326 | ||
327 | if (drv->pm) { | |
328 | if (drv->pm->restore_noirq) | |
329 | ret = drv->pm->restore_noirq(dev); | |
330 | } | |
331 | ||
332 | return ret; | |
333 | } | |
334 | ||
335 | #else /* !CONFIG_HIBERNATION */ | |
336 | ||
337 | #define of_platform_pm_freeze NULL | |
338 | #define of_platform_pm_thaw NULL | |
339 | #define of_platform_pm_poweroff NULL | |
340 | #define of_platform_pm_restore NULL | |
341 | #define of_platform_pm_freeze_noirq NULL | |
342 | #define of_platform_pm_thaw_noirq NULL | |
343 | #define of_platform_pm_poweroff_noirq NULL | |
344 | #define of_platform_pm_restore_noirq NULL | |
345 | ||
346 | #endif /* !CONFIG_HIBERNATION */ | |
347 | ||
348 | static struct dev_pm_ops of_platform_dev_pm_ops = { | |
349 | .prepare = of_platform_pm_prepare, | |
350 | .complete = of_platform_pm_complete, | |
351 | .suspend = of_platform_pm_suspend, | |
352 | .resume = of_platform_pm_resume, | |
353 | .freeze = of_platform_pm_freeze, | |
354 | .thaw = of_platform_pm_thaw, | |
355 | .poweroff = of_platform_pm_poweroff, | |
356 | .restore = of_platform_pm_restore, | |
357 | .suspend_noirq = of_platform_pm_suspend_noirq, | |
358 | .resume_noirq = of_platform_pm_resume_noirq, | |
359 | .freeze_noirq = of_platform_pm_freeze_noirq, | |
360 | .thaw_noirq = of_platform_pm_thaw_noirq, | |
361 | .poweroff_noirq = of_platform_pm_poweroff_noirq, | |
362 | .restore_noirq = of_platform_pm_restore_noirq, | |
363 | }; | |
364 | ||
365 | #define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops) | |
366 | ||
367 | #else /* !CONFIG_PM_SLEEP */ | |
368 | ||
369 | #define OF_PLATFORM_PM_OPS_PTR NULL | |
370 | ||
371 | #endif /* !CONFIG_PM_SLEEP */ | |
372 | ||
3f23de10 SR |
373 | int of_bus_type_init(struct bus_type *bus, const char *name) |
374 | { | |
375 | bus->name = name; | |
376 | bus->match = of_platform_bus_match; | |
377 | bus->probe = of_platform_device_probe; | |
378 | bus->remove = of_platform_device_remove; | |
a09ad3c4 | 379 | bus->shutdown = of_platform_device_shutdown; |
140b932f | 380 | bus->dev_attrs = of_platform_device_attrs; |
d35ef90b | 381 | bus->pm = OF_PLATFORM_PM_OPS_PTR; |
3f23de10 SR |
382 | return bus_register(bus); |
383 | } | |
5c457083 SR |
384 | |
385 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
386 | { | |
5c457083 SR |
387 | drv->driver.bus = bus; |
388 | ||
389 | /* register with core */ | |
390 | return driver_register(&drv->driver); | |
391 | } | |
392 | EXPORT_SYMBOL(of_register_driver); | |
393 | ||
394 | void of_unregister_driver(struct of_platform_driver *drv) | |
395 | { | |
396 | driver_unregister(&drv->driver); | |
397 | } | |
398 | EXPORT_SYMBOL(of_unregister_driver); |