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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 | { | |
24 | struct of_device *of_dev = to_of_device(dev); | |
25 | struct of_platform_driver *of_drv = to_of_platform_driver(drv); | |
26 | const struct of_device_id *matches = of_drv->match_table; | |
27 | ||
28 | if (!matches) | |
29 | return 0; | |
30 | ||
31 | return of_match_device(matches, of_dev) != NULL; | |
32 | } | |
33 | ||
34 | static int of_platform_device_probe(struct device *dev) | |
35 | { | |
36 | int error = -ENODEV; | |
37 | struct of_platform_driver *drv; | |
38 | struct of_device *of_dev; | |
39 | const struct of_device_id *match; | |
40 | ||
41 | drv = to_of_platform_driver(dev->driver); | |
42 | of_dev = to_of_device(dev); | |
43 | ||
44 | if (!drv->probe) | |
45 | return error; | |
46 | ||
47 | of_dev_get(of_dev); | |
48 | ||
49 | match = of_match_device(drv->match_table, of_dev); | |
50 | if (match) | |
51 | error = drv->probe(of_dev, match); | |
52 | if (error) | |
53 | of_dev_put(of_dev); | |
54 | ||
55 | return error; | |
56 | } | |
57 | ||
58 | static int of_platform_device_remove(struct device *dev) | |
59 | { | |
60 | struct of_device *of_dev = to_of_device(dev); | |
61 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
62 | ||
63 | if (dev->driver && drv->remove) | |
64 | drv->remove(of_dev); | |
65 | return 0; | |
66 | } | |
67 | ||
d35ef90b | 68 | static void of_platform_device_shutdown(struct device *dev) |
3f23de10 SR |
69 | { |
70 | struct of_device *of_dev = to_of_device(dev); | |
71 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
3f23de10 | 72 | |
d35ef90b AV |
73 | if (dev->driver && drv->shutdown) |
74 | drv->shutdown(of_dev); | |
3f23de10 SR |
75 | } |
76 | ||
d35ef90b AV |
77 | #ifdef CONFIG_PM_SLEEP |
78 | ||
79 | static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
3f23de10 SR |
80 | { |
81 | struct of_device *of_dev = to_of_device(dev); | |
82 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 83 | int ret = 0; |
3f23de10 | 84 | |
d35ef90b AV |
85 | if (dev->driver && drv->suspend) |
86 | ret = drv->suspend(of_dev, mesg); | |
87 | return ret; | |
3f23de10 SR |
88 | } |
89 | ||
d35ef90b | 90 | static int of_platform_legacy_resume(struct device *dev) |
a09ad3c4 ME |
91 | { |
92 | struct of_device *of_dev = to_of_device(dev); | |
93 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 94 | int ret = 0; |
a09ad3c4 | 95 | |
d35ef90b AV |
96 | if (dev->driver && drv->resume) |
97 | ret = drv->resume(of_dev); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | static int of_platform_pm_prepare(struct device *dev) | |
102 | { | |
103 | struct device_driver *drv = dev->driver; | |
104 | int ret = 0; | |
105 | ||
106 | if (drv && drv->pm && drv->pm->prepare) | |
107 | ret = drv->pm->prepare(dev); | |
108 | ||
109 | return ret; | |
110 | } | |
111 | ||
112 | static void of_platform_pm_complete(struct device *dev) | |
113 | { | |
114 | struct device_driver *drv = dev->driver; | |
115 | ||
116 | if (drv && drv->pm && drv->pm->complete) | |
117 | drv->pm->complete(dev); | |
118 | } | |
119 | ||
120 | #ifdef CONFIG_SUSPEND | |
121 | ||
122 | static int of_platform_pm_suspend(struct device *dev) | |
123 | { | |
124 | struct device_driver *drv = dev->driver; | |
125 | int ret = 0; | |
126 | ||
127 | if (!drv) | |
128 | return 0; | |
129 | ||
130 | if (drv->pm) { | |
131 | if (drv->pm->suspend) | |
132 | ret = drv->pm->suspend(dev); | |
133 | } else { | |
134 | ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND); | |
135 | } | |
136 | ||
137 | return ret; | |
a09ad3c4 ME |
138 | } |
139 | ||
d35ef90b AV |
140 | static int of_platform_pm_suspend_noirq(struct device *dev) |
141 | { | |
142 | struct device_driver *drv = dev->driver; | |
143 | int ret = 0; | |
144 | ||
145 | if (!drv) | |
146 | return 0; | |
147 | ||
148 | if (drv->pm) { | |
149 | if (drv->pm->suspend_noirq) | |
150 | ret = drv->pm->suspend_noirq(dev); | |
151 | } | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
156 | static int of_platform_pm_resume(struct device *dev) | |
157 | { | |
158 | struct device_driver *drv = dev->driver; | |
159 | int ret = 0; | |
160 | ||
161 | if (!drv) | |
162 | return 0; | |
163 | ||
164 | if (drv->pm) { | |
165 | if (drv->pm->resume) | |
166 | ret = drv->pm->resume(dev); | |
167 | } else { | |
168 | ret = of_platform_legacy_resume(dev); | |
169 | } | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | static int of_platform_pm_resume_noirq(struct device *dev) | |
175 | { | |
176 | struct device_driver *drv = dev->driver; | |
177 | int ret = 0; | |
178 | ||
179 | if (!drv) | |
180 | return 0; | |
181 | ||
182 | if (drv->pm) { | |
183 | if (drv->pm->resume_noirq) | |
184 | ret = drv->pm->resume_noirq(dev); | |
185 | } | |
186 | ||
187 | return ret; | |
188 | } | |
189 | ||
190 | #else /* !CONFIG_SUSPEND */ | |
191 | ||
192 | #define of_platform_pm_suspend NULL | |
193 | #define of_platform_pm_resume NULL | |
194 | #define of_platform_pm_suspend_noirq NULL | |
195 | #define of_platform_pm_resume_noirq NULL | |
196 | ||
197 | #endif /* !CONFIG_SUSPEND */ | |
198 | ||
199 | #ifdef CONFIG_HIBERNATION | |
200 | ||
201 | static int of_platform_pm_freeze(struct device *dev) | |
202 | { | |
203 | struct device_driver *drv = dev->driver; | |
204 | int ret = 0; | |
205 | ||
206 | if (!drv) | |
207 | return 0; | |
208 | ||
209 | if (drv->pm) { | |
210 | if (drv->pm->freeze) | |
211 | ret = drv->pm->freeze(dev); | |
212 | } else { | |
213 | ret = of_platform_legacy_suspend(dev, PMSG_FREEZE); | |
214 | } | |
215 | ||
216 | return ret; | |
217 | } | |
218 | ||
219 | static int of_platform_pm_freeze_noirq(struct device *dev) | |
220 | { | |
221 | struct device_driver *drv = dev->driver; | |
222 | int ret = 0; | |
223 | ||
224 | if (!drv) | |
225 | return 0; | |
226 | ||
227 | if (drv->pm) { | |
228 | if (drv->pm->freeze_noirq) | |
229 | ret = drv->pm->freeze_noirq(dev); | |
230 | } | |
231 | ||
232 | return ret; | |
233 | } | |
234 | ||
235 | static int of_platform_pm_thaw(struct device *dev) | |
236 | { | |
237 | struct device_driver *drv = dev->driver; | |
238 | int ret = 0; | |
239 | ||
240 | if (!drv) | |
241 | return 0; | |
242 | ||
243 | if (drv->pm) { | |
244 | if (drv->pm->thaw) | |
245 | ret = drv->pm->thaw(dev); | |
246 | } else { | |
247 | ret = of_platform_legacy_resume(dev); | |
248 | } | |
249 | ||
250 | return ret; | |
251 | } | |
252 | ||
253 | static int of_platform_pm_thaw_noirq(struct device *dev) | |
254 | { | |
255 | struct device_driver *drv = dev->driver; | |
256 | int ret = 0; | |
257 | ||
258 | if (!drv) | |
259 | return 0; | |
260 | ||
261 | if (drv->pm) { | |
262 | if (drv->pm->thaw_noirq) | |
263 | ret = drv->pm->thaw_noirq(dev); | |
264 | } | |
265 | ||
266 | return ret; | |
267 | } | |
268 | ||
269 | static int of_platform_pm_poweroff(struct device *dev) | |
270 | { | |
271 | struct device_driver *drv = dev->driver; | |
272 | int ret = 0; | |
273 | ||
274 | if (!drv) | |
275 | return 0; | |
276 | ||
277 | if (drv->pm) { | |
278 | if (drv->pm->poweroff) | |
279 | ret = drv->pm->poweroff(dev); | |
280 | } else { | |
281 | ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
282 | } | |
283 | ||
284 | return ret; | |
285 | } | |
286 | ||
287 | static int of_platform_pm_poweroff_noirq(struct device *dev) | |
288 | { | |
289 | struct device_driver *drv = dev->driver; | |
290 | int ret = 0; | |
291 | ||
292 | if (!drv) | |
293 | return 0; | |
294 | ||
295 | if (drv->pm) { | |
296 | if (drv->pm->poweroff_noirq) | |
297 | ret = drv->pm->poweroff_noirq(dev); | |
298 | } | |
299 | ||
300 | return ret; | |
301 | } | |
302 | ||
303 | static int of_platform_pm_restore(struct device *dev) | |
304 | { | |
305 | struct device_driver *drv = dev->driver; | |
306 | int ret = 0; | |
307 | ||
308 | if (!drv) | |
309 | return 0; | |
310 | ||
311 | if (drv->pm) { | |
312 | if (drv->pm->restore) | |
313 | ret = drv->pm->restore(dev); | |
314 | } else { | |
315 | ret = of_platform_legacy_resume(dev); | |
316 | } | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
321 | static int of_platform_pm_restore_noirq(struct device *dev) | |
322 | { | |
323 | struct device_driver *drv = dev->driver; | |
324 | int ret = 0; | |
325 | ||
326 | if (!drv) | |
327 | return 0; | |
328 | ||
329 | if (drv->pm) { | |
330 | if (drv->pm->restore_noirq) | |
331 | ret = drv->pm->restore_noirq(dev); | |
332 | } | |
333 | ||
334 | return ret; | |
335 | } | |
336 | ||
337 | #else /* !CONFIG_HIBERNATION */ | |
338 | ||
339 | #define of_platform_pm_freeze NULL | |
340 | #define of_platform_pm_thaw NULL | |
341 | #define of_platform_pm_poweroff NULL | |
342 | #define of_platform_pm_restore NULL | |
343 | #define of_platform_pm_freeze_noirq NULL | |
344 | #define of_platform_pm_thaw_noirq NULL | |
345 | #define of_platform_pm_poweroff_noirq NULL | |
346 | #define of_platform_pm_restore_noirq NULL | |
347 | ||
348 | #endif /* !CONFIG_HIBERNATION */ | |
349 | ||
350 | static struct dev_pm_ops of_platform_dev_pm_ops = { | |
351 | .prepare = of_platform_pm_prepare, | |
352 | .complete = of_platform_pm_complete, | |
353 | .suspend = of_platform_pm_suspend, | |
354 | .resume = of_platform_pm_resume, | |
355 | .freeze = of_platform_pm_freeze, | |
356 | .thaw = of_platform_pm_thaw, | |
357 | .poweroff = of_platform_pm_poweroff, | |
358 | .restore = of_platform_pm_restore, | |
359 | .suspend_noirq = of_platform_pm_suspend_noirq, | |
360 | .resume_noirq = of_platform_pm_resume_noirq, | |
361 | .freeze_noirq = of_platform_pm_freeze_noirq, | |
362 | .thaw_noirq = of_platform_pm_thaw_noirq, | |
363 | .poweroff_noirq = of_platform_pm_poweroff_noirq, | |
364 | .restore_noirq = of_platform_pm_restore_noirq, | |
365 | }; | |
366 | ||
367 | #define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops) | |
368 | ||
369 | #else /* !CONFIG_PM_SLEEP */ | |
370 | ||
371 | #define OF_PLATFORM_PM_OPS_PTR NULL | |
372 | ||
373 | #endif /* !CONFIG_PM_SLEEP */ | |
374 | ||
3f23de10 SR |
375 | int of_bus_type_init(struct bus_type *bus, const char *name) |
376 | { | |
377 | bus->name = name; | |
378 | bus->match = of_platform_bus_match; | |
379 | bus->probe = of_platform_device_probe; | |
380 | bus->remove = of_platform_device_remove; | |
a09ad3c4 | 381 | bus->shutdown = of_platform_device_shutdown; |
140b932f | 382 | bus->dev_attrs = of_platform_device_attrs; |
d35ef90b | 383 | bus->pm = OF_PLATFORM_PM_OPS_PTR; |
3f23de10 SR |
384 | return bus_register(bus); |
385 | } | |
5c457083 SR |
386 | |
387 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
388 | { | |
389 | /* initialize common driver fields */ | |
390 | if (!drv->driver.name) | |
391 | drv->driver.name = drv->name; | |
392 | if (!drv->driver.owner) | |
393 | drv->driver.owner = drv->owner; | |
394 | drv->driver.bus = bus; | |
395 | ||
396 | /* register with core */ | |
397 | return driver_register(&drv->driver); | |
398 | } | |
399 | EXPORT_SYMBOL(of_register_driver); | |
400 | ||
401 | void of_unregister_driver(struct of_platform_driver *drv) | |
402 | { | |
403 | driver_unregister(&drv->driver); | |
404 | } | |
405 | EXPORT_SYMBOL(of_unregister_driver); |