Commit | Line | Data |
---|---|---|
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 | 16 | #include <linux/device.h> |
5fd200f3 | 17 | #include <linux/dma-mapping.h> |
50ef5284 | 18 | #include <linux/slab.h> |
9e3288dc | 19 | #include <linux/of_address.h> |
3f23de10 | 20 | #include <linux/of_device.h> |
9e3288dc | 21 | #include <linux/of_irq.h> |
3f23de10 | 22 | #include <linux/of_platform.h> |
eca39301 GL |
23 | #include <linux/platform_device.h> |
24 | ||
c6085584 JB |
25 | static int of_dev_node_match(struct device *dev, void *data) |
26 | { | |
27 | return dev->of_node == data; | |
28 | } | |
29 | ||
30 | /** | |
31 | * of_find_device_by_node - Find the platform_device associated with a node | |
32 | * @np: Pointer to device tree node | |
33 | * | |
34 | * Returns platform_device pointer, or NULL if not found | |
35 | */ | |
36 | struct platform_device *of_find_device_by_node(struct device_node *np) | |
37 | { | |
38 | struct device *dev; | |
39 | ||
40 | dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match); | |
41 | return dev ? to_platform_device(dev) : NULL; | |
42 | } | |
43 | EXPORT_SYMBOL(of_find_device_by_node); | |
44 | ||
eca39301 GL |
45 | static int platform_driver_probe_shim(struct platform_device *pdev) |
46 | { | |
47 | struct platform_driver *pdrv; | |
48 | struct of_platform_driver *ofpdrv; | |
49 | const struct of_device_id *match; | |
50 | ||
51 | pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); | |
52 | ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); | |
c1b6d380 GL |
53 | |
54 | /* There is an unlikely chance that an of_platform driver might match | |
55 | * on a non-OF platform device. If so, then of_match_device() will | |
56 | * come up empty. Return -EINVAL in this case so other drivers get | |
57 | * the chance to bind. */ | |
eca39301 | 58 | match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); |
c1b6d380 | 59 | return match ? ofpdrv->probe(pdev, match) : -EINVAL; |
eca39301 GL |
60 | } |
61 | ||
62 | static void platform_driver_shutdown_shim(struct platform_device *pdev) | |
63 | { | |
64 | struct platform_driver *pdrv; | |
65 | struct of_platform_driver *ofpdrv; | |
66 | ||
67 | pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); | |
68 | ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); | |
69 | ofpdrv->shutdown(pdev); | |
70 | } | |
71 | ||
72 | /** | |
73 | * of_register_platform_driver | |
74 | */ | |
75 | int of_register_platform_driver(struct of_platform_driver *drv) | |
76 | { | |
7fb8f881 GL |
77 | char *of_name; |
78 | ||
eca39301 GL |
79 | /* setup of_platform_driver to platform_driver adaptors */ |
80 | drv->platform_driver.driver = drv->driver; | |
7fb8f881 GL |
81 | |
82 | /* Prefix the driver name with 'of:' to avoid namespace collisions | |
83 | * and bogus matches. There are some drivers in the tree that | |
84 | * register both an of_platform_driver and a platform_driver with | |
85 | * the same name. This is a temporary measure until they are all | |
86 | * cleaned up --gcl July 29, 2010 */ | |
87 | of_name = kmalloc(strlen(drv->driver.name) + 5, GFP_KERNEL); | |
88 | if (!of_name) | |
89 | return -ENOMEM; | |
90 | sprintf(of_name, "of:%s", drv->driver.name); | |
91 | drv->platform_driver.driver.name = of_name; | |
92 | ||
eca39301 GL |
93 | if (drv->probe) |
94 | drv->platform_driver.probe = platform_driver_probe_shim; | |
95 | drv->platform_driver.remove = drv->remove; | |
96 | if (drv->shutdown) | |
97 | drv->platform_driver.shutdown = platform_driver_shutdown_shim; | |
98 | drv->platform_driver.suspend = drv->suspend; | |
99 | drv->platform_driver.resume = drv->resume; | |
100 | ||
101 | return platform_driver_register(&drv->platform_driver); | |
102 | } | |
103 | EXPORT_SYMBOL(of_register_platform_driver); | |
104 | ||
105 | void of_unregister_platform_driver(struct of_platform_driver *drv) | |
106 | { | |
107 | platform_driver_unregister(&drv->platform_driver); | |
7fb8f881 GL |
108 | kfree(drv->platform_driver.driver.name); |
109 | drv->platform_driver.driver.name = NULL; | |
eca39301 GL |
110 | } |
111 | EXPORT_SYMBOL(of_unregister_platform_driver); | |
3f23de10 | 112 | |
596c955c GL |
113 | #if defined(CONFIG_PPC_DCR) |
114 | #include <asm/dcr.h> | |
115 | #endif | |
116 | ||
140b932f OH |
117 | extern struct device_attribute of_platform_device_attrs[]; |
118 | ||
3f23de10 SR |
119 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) |
120 | { | |
597b9d1e | 121 | const struct of_device_id *matches = drv->of_match_table; |
3f23de10 SR |
122 | |
123 | if (!matches) | |
124 | return 0; | |
125 | ||
44504b2b | 126 | return of_match_device(matches, dev) != NULL; |
3f23de10 SR |
127 | } |
128 | ||
129 | static int of_platform_device_probe(struct device *dev) | |
130 | { | |
131 | int error = -ENODEV; | |
132 | struct of_platform_driver *drv; | |
94a0cb1f | 133 | struct platform_device *of_dev; |
3f23de10 SR |
134 | const struct of_device_id *match; |
135 | ||
136 | drv = to_of_platform_driver(dev->driver); | |
94a0cb1f | 137 | of_dev = to_platform_device(dev); |
3f23de10 SR |
138 | |
139 | if (!drv->probe) | |
140 | return error; | |
141 | ||
142 | of_dev_get(of_dev); | |
143 | ||
44504b2b | 144 | match = of_match_device(drv->driver.of_match_table, dev); |
3f23de10 SR |
145 | if (match) |
146 | error = drv->probe(of_dev, match); | |
147 | if (error) | |
148 | of_dev_put(of_dev); | |
149 | ||
150 | return error; | |
151 | } | |
152 | ||
153 | static int of_platform_device_remove(struct device *dev) | |
154 | { | |
94a0cb1f | 155 | struct platform_device *of_dev = to_platform_device(dev); |
3f23de10 SR |
156 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); |
157 | ||
158 | if (dev->driver && drv->remove) | |
159 | drv->remove(of_dev); | |
160 | return 0; | |
161 | } | |
162 | ||
d35ef90b | 163 | static void of_platform_device_shutdown(struct device *dev) |
3f23de10 | 164 | { |
94a0cb1f | 165 | struct platform_device *of_dev = to_platform_device(dev); |
3f23de10 | 166 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); |
3f23de10 | 167 | |
d35ef90b AV |
168 | if (dev->driver && drv->shutdown) |
169 | drv->shutdown(of_dev); | |
3f23de10 SR |
170 | } |
171 | ||
d35ef90b AV |
172 | #ifdef CONFIG_PM_SLEEP |
173 | ||
174 | static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
3f23de10 | 175 | { |
94a0cb1f | 176 | struct platform_device *of_dev = to_platform_device(dev); |
3f23de10 | 177 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); |
d35ef90b | 178 | int ret = 0; |
3f23de10 | 179 | |
d35ef90b AV |
180 | if (dev->driver && drv->suspend) |
181 | ret = drv->suspend(of_dev, mesg); | |
182 | return ret; | |
3f23de10 SR |
183 | } |
184 | ||
d35ef90b | 185 | static int of_platform_legacy_resume(struct device *dev) |
a09ad3c4 | 186 | { |
94a0cb1f | 187 | struct platform_device *of_dev = to_platform_device(dev); |
a09ad3c4 | 188 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); |
d35ef90b | 189 | int ret = 0; |
a09ad3c4 | 190 | |
d35ef90b AV |
191 | if (dev->driver && drv->resume) |
192 | ret = drv->resume(of_dev); | |
193 | return ret; | |
194 | } | |
195 | ||
196 | static int of_platform_pm_prepare(struct device *dev) | |
197 | { | |
198 | struct device_driver *drv = dev->driver; | |
199 | int ret = 0; | |
200 | ||
201 | if (drv && drv->pm && drv->pm->prepare) | |
202 | ret = drv->pm->prepare(dev); | |
203 | ||
204 | return ret; | |
205 | } | |
206 | ||
207 | static void of_platform_pm_complete(struct device *dev) | |
208 | { | |
209 | struct device_driver *drv = dev->driver; | |
210 | ||
211 | if (drv && drv->pm && drv->pm->complete) | |
212 | drv->pm->complete(dev); | |
213 | } | |
214 | ||
215 | #ifdef CONFIG_SUSPEND | |
216 | ||
217 | static int of_platform_pm_suspend(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->suspend) | |
227 | ret = drv->pm->suspend(dev); | |
228 | } else { | |
229 | ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND); | |
230 | } | |
231 | ||
232 | return ret; | |
a09ad3c4 ME |
233 | } |
234 | ||
d35ef90b AV |
235 | static int of_platform_pm_suspend_noirq(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->suspend_noirq) | |
245 | ret = drv->pm->suspend_noirq(dev); | |
246 | } | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
251 | static int of_platform_pm_resume(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->resume) | |
261 | ret = drv->pm->resume(dev); | |
262 | } else { | |
263 | ret = of_platform_legacy_resume(dev); | |
264 | } | |
265 | ||
266 | return ret; | |
267 | } | |
268 | ||
269 | static int of_platform_pm_resume_noirq(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->resume_noirq) | |
279 | ret = drv->pm->resume_noirq(dev); | |
280 | } | |
281 | ||
282 | return ret; | |
283 | } | |
284 | ||
285 | #else /* !CONFIG_SUSPEND */ | |
286 | ||
287 | #define of_platform_pm_suspend NULL | |
288 | #define of_platform_pm_resume NULL | |
289 | #define of_platform_pm_suspend_noirq NULL | |
290 | #define of_platform_pm_resume_noirq NULL | |
291 | ||
292 | #endif /* !CONFIG_SUSPEND */ | |
293 | ||
294 | #ifdef CONFIG_HIBERNATION | |
295 | ||
296 | static int of_platform_pm_freeze(struct device *dev) | |
297 | { | |
298 | struct device_driver *drv = dev->driver; | |
299 | int ret = 0; | |
300 | ||
301 | if (!drv) | |
302 | return 0; | |
303 | ||
304 | if (drv->pm) { | |
305 | if (drv->pm->freeze) | |
306 | ret = drv->pm->freeze(dev); | |
307 | } else { | |
308 | ret = of_platform_legacy_suspend(dev, PMSG_FREEZE); | |
309 | } | |
310 | ||
311 | return ret; | |
312 | } | |
313 | ||
314 | static int of_platform_pm_freeze_noirq(struct device *dev) | |
315 | { | |
316 | struct device_driver *drv = dev->driver; | |
317 | int ret = 0; | |
318 | ||
319 | if (!drv) | |
320 | return 0; | |
321 | ||
322 | if (drv->pm) { | |
323 | if (drv->pm->freeze_noirq) | |
324 | ret = drv->pm->freeze_noirq(dev); | |
325 | } | |
326 | ||
327 | return ret; | |
328 | } | |
329 | ||
330 | static int of_platform_pm_thaw(struct device *dev) | |
331 | { | |
332 | struct device_driver *drv = dev->driver; | |
333 | int ret = 0; | |
334 | ||
335 | if (!drv) | |
336 | return 0; | |
337 | ||
338 | if (drv->pm) { | |
339 | if (drv->pm->thaw) | |
340 | ret = drv->pm->thaw(dev); | |
341 | } else { | |
342 | ret = of_platform_legacy_resume(dev); | |
343 | } | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
348 | static int of_platform_pm_thaw_noirq(struct device *dev) | |
349 | { | |
350 | struct device_driver *drv = dev->driver; | |
351 | int ret = 0; | |
352 | ||
353 | if (!drv) | |
354 | return 0; | |
355 | ||
356 | if (drv->pm) { | |
357 | if (drv->pm->thaw_noirq) | |
358 | ret = drv->pm->thaw_noirq(dev); | |
359 | } | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | static int of_platform_pm_poweroff(struct device *dev) | |
365 | { | |
366 | struct device_driver *drv = dev->driver; | |
367 | int ret = 0; | |
368 | ||
369 | if (!drv) | |
370 | return 0; | |
371 | ||
372 | if (drv->pm) { | |
373 | if (drv->pm->poweroff) | |
374 | ret = drv->pm->poweroff(dev); | |
375 | } else { | |
376 | ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
377 | } | |
378 | ||
379 | return ret; | |
380 | } | |
381 | ||
382 | static int of_platform_pm_poweroff_noirq(struct device *dev) | |
383 | { | |
384 | struct device_driver *drv = dev->driver; | |
385 | int ret = 0; | |
386 | ||
387 | if (!drv) | |
388 | return 0; | |
389 | ||
390 | if (drv->pm) { | |
391 | if (drv->pm->poweroff_noirq) | |
392 | ret = drv->pm->poweroff_noirq(dev); | |
393 | } | |
394 | ||
395 | return ret; | |
396 | } | |
397 | ||
398 | static int of_platform_pm_restore(struct device *dev) | |
399 | { | |
400 | struct device_driver *drv = dev->driver; | |
401 | int ret = 0; | |
402 | ||
403 | if (!drv) | |
404 | return 0; | |
405 | ||
406 | if (drv->pm) { | |
407 | if (drv->pm->restore) | |
408 | ret = drv->pm->restore(dev); | |
409 | } else { | |
410 | ret = of_platform_legacy_resume(dev); | |
411 | } | |
412 | ||
413 | return ret; | |
414 | } | |
415 | ||
416 | static int of_platform_pm_restore_noirq(struct device *dev) | |
417 | { | |
418 | struct device_driver *drv = dev->driver; | |
419 | int ret = 0; | |
420 | ||
421 | if (!drv) | |
422 | return 0; | |
423 | ||
424 | if (drv->pm) { | |
425 | if (drv->pm->restore_noirq) | |
426 | ret = drv->pm->restore_noirq(dev); | |
427 | } | |
428 | ||
429 | return ret; | |
430 | } | |
431 | ||
432 | #else /* !CONFIG_HIBERNATION */ | |
433 | ||
434 | #define of_platform_pm_freeze NULL | |
435 | #define of_platform_pm_thaw NULL | |
436 | #define of_platform_pm_poweroff NULL | |
437 | #define of_platform_pm_restore NULL | |
438 | #define of_platform_pm_freeze_noirq NULL | |
439 | #define of_platform_pm_thaw_noirq NULL | |
440 | #define of_platform_pm_poweroff_noirq NULL | |
441 | #define of_platform_pm_restore_noirq NULL | |
442 | ||
443 | #endif /* !CONFIG_HIBERNATION */ | |
444 | ||
445 | static struct dev_pm_ops of_platform_dev_pm_ops = { | |
446 | .prepare = of_platform_pm_prepare, | |
447 | .complete = of_platform_pm_complete, | |
448 | .suspend = of_platform_pm_suspend, | |
449 | .resume = of_platform_pm_resume, | |
450 | .freeze = of_platform_pm_freeze, | |
451 | .thaw = of_platform_pm_thaw, | |
452 | .poweroff = of_platform_pm_poweroff, | |
453 | .restore = of_platform_pm_restore, | |
454 | .suspend_noirq = of_platform_pm_suspend_noirq, | |
455 | .resume_noirq = of_platform_pm_resume_noirq, | |
456 | .freeze_noirq = of_platform_pm_freeze_noirq, | |
457 | .thaw_noirq = of_platform_pm_thaw_noirq, | |
458 | .poweroff_noirq = of_platform_pm_poweroff_noirq, | |
459 | .restore_noirq = of_platform_pm_restore_noirq, | |
460 | }; | |
461 | ||
462 | #define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops) | |
463 | ||
464 | #else /* !CONFIG_PM_SLEEP */ | |
465 | ||
466 | #define OF_PLATFORM_PM_OPS_PTR NULL | |
467 | ||
468 | #endif /* !CONFIG_PM_SLEEP */ | |
469 | ||
3f23de10 SR |
470 | int of_bus_type_init(struct bus_type *bus, const char *name) |
471 | { | |
472 | bus->name = name; | |
473 | bus->match = of_platform_bus_match; | |
474 | bus->probe = of_platform_device_probe; | |
475 | bus->remove = of_platform_device_remove; | |
a09ad3c4 | 476 | bus->shutdown = of_platform_device_shutdown; |
140b932f | 477 | bus->dev_attrs = of_platform_device_attrs; |
d35ef90b | 478 | bus->pm = OF_PLATFORM_PM_OPS_PTR; |
3f23de10 SR |
479 | return bus_register(bus); |
480 | } | |
5c457083 SR |
481 | |
482 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
483 | { | |
eca39301 GL |
484 | /* |
485 | * Temporary: of_platform_bus used to be distinct from the platform | |
486 | * bus. It isn't anymore, and so drivers on the platform bus need | |
487 | * to be registered in a special way. | |
488 | * | |
489 | * After all of_platform_bus_type drivers are converted to | |
490 | * platform_drivers, this exception can be removed. | |
491 | */ | |
492 | if (bus == &platform_bus_type) | |
493 | return of_register_platform_driver(drv); | |
5c457083 SR |
494 | |
495 | /* register with core */ | |
eca39301 | 496 | drv->driver.bus = bus; |
5c457083 SR |
497 | return driver_register(&drv->driver); |
498 | } | |
499 | EXPORT_SYMBOL(of_register_driver); | |
500 | ||
501 | void of_unregister_driver(struct of_platform_driver *drv) | |
502 | { | |
eca39301 GL |
503 | if (drv->driver.bus == &platform_bus_type) |
504 | of_unregister_platform_driver(drv); | |
505 | else | |
506 | driver_unregister(&drv->driver); | |
5c457083 SR |
507 | } |
508 | EXPORT_SYMBOL(of_unregister_driver); | |
5fd200f3 GL |
509 | |
510 | #if !defined(CONFIG_SPARC) | |
511 | /* | |
512 | * The following routines scan a subtree and registers a device for | |
513 | * each applicable node. | |
514 | * | |
515 | * Note: sparc doesn't use these routines because it has a different | |
516 | * mechanism for creating devices from device tree nodes. | |
517 | */ | |
518 | ||
94c09319 GL |
519 | /** |
520 | * of_device_make_bus_id - Use the device node data to assign a unique name | |
521 | * @dev: pointer to device structure that is linked to a device tree node | |
522 | * | |
523 | * This routine will first try using either the dcr-reg or the reg property | |
524 | * value to derive a unique name. As a last resort it will use the node | |
525 | * name followed by a unique number. | |
526 | */ | |
c6601225 | 527 | void of_device_make_bus_id(struct device *dev) |
94c09319 GL |
528 | { |
529 | static atomic_t bus_no_reg_magic; | |
530 | struct device_node *node = dev->of_node; | |
531 | const u32 *reg; | |
532 | u64 addr; | |
533 | int magic; | |
534 | ||
535 | #ifdef CONFIG_PPC_DCR | |
536 | /* | |
537 | * If it's a DCR based device, use 'd' for native DCRs | |
538 | * and 'D' for MMIO DCRs. | |
539 | */ | |
540 | reg = of_get_property(node, "dcr-reg", NULL); | |
541 | if (reg) { | |
542 | #ifdef CONFIG_PPC_DCR_NATIVE | |
543 | dev_set_name(dev, "d%x.%s", *reg, node->name); | |
544 | #else /* CONFIG_PPC_DCR_NATIVE */ | |
545 | u64 addr = of_translate_dcr_address(node, *reg, NULL); | |
546 | if (addr != OF_BAD_ADDR) { | |
547 | dev_set_name(dev, "D%llx.%s", | |
548 | (unsigned long long)addr, node->name); | |
549 | return; | |
550 | } | |
551 | #endif /* !CONFIG_PPC_DCR_NATIVE */ | |
552 | } | |
553 | #endif /* CONFIG_PPC_DCR */ | |
554 | ||
555 | /* | |
556 | * For MMIO, get the physical address | |
557 | */ | |
558 | reg = of_get_property(node, "reg", NULL); | |
559 | if (reg) { | |
560 | addr = of_translate_address(node, reg); | |
561 | if (addr != OF_BAD_ADDR) { | |
562 | dev_set_name(dev, "%llx.%s", | |
563 | (unsigned long long)addr, node->name); | |
564 | return; | |
565 | } | |
566 | } | |
567 | ||
568 | /* | |
569 | * No BusID, use the node name and add a globally incremented | |
570 | * counter (and pray...) | |
571 | */ | |
572 | magic = atomic_add_return(1, &bus_no_reg_magic); | |
573 | dev_set_name(dev, "%s.%d", node->name, magic - 1); | |
574 | } | |
575 | ||
576 | /** | |
577 | * of_device_alloc - Allocate and initialize an of_device | |
578 | * @np: device node to assign to device | |
579 | * @bus_id: Name to assign to the device. May be null to use default name. | |
580 | * @parent: Parent device. | |
581 | */ | |
94a0cb1f | 582 | struct platform_device *of_device_alloc(struct device_node *np, |
94c09319 GL |
583 | const char *bus_id, |
584 | struct device *parent) | |
585 | { | |
94a0cb1f | 586 | struct platform_device *dev; |
ac80a51e GL |
587 | int rc, i, num_reg = 0, num_irq = 0; |
588 | struct resource *res, temp_res; | |
589 | ||
590 | /* First count how many resources are needed */ | |
591 | while (of_address_to_resource(np, num_reg, &temp_res) == 0) | |
592 | num_reg++; | |
593 | while (of_irq_to_resource(np, num_irq, &temp_res) != NO_IRQ) | |
594 | num_irq++; | |
595 | ||
596 | /* Allocate memory for both the struct device and the resource table */ | |
597 | dev = kzalloc(sizeof(*dev) + (sizeof(*res) * (num_reg + num_irq)), | |
598 | GFP_KERNEL); | |
94c09319 GL |
599 | if (!dev) |
600 | return NULL; | |
ac80a51e GL |
601 | res = (struct resource *) &dev[1]; |
602 | ||
603 | /* Populate the resource table */ | |
604 | if (num_irq || num_reg) { | |
605 | dev->num_resources = num_reg + num_irq; | |
606 | dev->resource = res; | |
607 | for (i = 0; i < num_reg; i++, res++) { | |
608 | rc = of_address_to_resource(np, i, res); | |
609 | WARN_ON(rc); | |
610 | } | |
611 | for (i = 0; i < num_irq; i++, res++) { | |
612 | rc = of_irq_to_resource(np, i, res); | |
613 | WARN_ON(rc == NO_IRQ); | |
614 | } | |
615 | } | |
94c09319 GL |
616 | |
617 | dev->dev.of_node = of_node_get(np); | |
9e3288dc | 618 | #if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE) |
94c09319 | 619 | dev->dev.dma_mask = &dev->archdata.dma_mask; |
9e3288dc | 620 | #endif |
94c09319 GL |
621 | dev->dev.parent = parent; |
622 | dev->dev.release = of_release_dev; | |
623 | ||
624 | if (bus_id) | |
625 | dev_set_name(&dev->dev, "%s", bus_id); | |
626 | else | |
627 | of_device_make_bus_id(&dev->dev); | |
628 | ||
629 | return dev; | |
630 | } | |
631 | EXPORT_SYMBOL(of_device_alloc); | |
632 | ||
5fd200f3 GL |
633 | /** |
634 | * of_platform_device_create - Alloc, initialize and register an of_device | |
635 | * @np: pointer to node to create device for | |
636 | * @bus_id: name to assign device | |
637 | * @parent: Linux device model parent device. | |
638 | */ | |
94a0cb1f | 639 | struct platform_device *of_platform_device_create(struct device_node *np, |
5fd200f3 GL |
640 | const char *bus_id, |
641 | struct device *parent) | |
642 | { | |
94a0cb1f | 643 | struct platform_device *dev; |
5fd200f3 GL |
644 | |
645 | dev = of_device_alloc(np, bus_id, parent); | |
646 | if (!dev) | |
647 | return NULL; | |
648 | ||
9e3288dc | 649 | #if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE) |
5fd200f3 | 650 | dev->archdata.dma_mask = 0xffffffffUL; |
9e3288dc | 651 | #endif |
5fd200f3 | 652 | dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
eca39301 | 653 | dev->dev.bus = &platform_bus_type; |
5fd200f3 GL |
654 | |
655 | /* We do not fill the DMA ops for platform devices by default. | |
656 | * This is currently the responsibility of the platform code | |
657 | * to do such, possibly using a device notifier | |
658 | */ | |
659 | ||
660 | if (of_device_register(dev) != 0) { | |
661 | of_device_free(dev); | |
662 | return NULL; | |
663 | } | |
664 | ||
665 | return dev; | |
666 | } | |
667 | EXPORT_SYMBOL(of_platform_device_create); | |
668 | ||
669 | /** | |
670 | * of_platform_bus_create - Create an OF device for a bus node and all its | |
671 | * children. Optionally recursively instantiate matching busses. | |
672 | * @bus: device node of the bus to instantiate | |
673 | * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to | |
674 | * disallow recursive creation of child busses | |
675 | */ | |
676 | static int of_platform_bus_create(const struct device_node *bus, | |
677 | const struct of_device_id *matches, | |
678 | struct device *parent) | |
679 | { | |
680 | struct device_node *child; | |
94a0cb1f | 681 | struct platform_device *dev; |
5fd200f3 GL |
682 | int rc = 0; |
683 | ||
684 | for_each_child_of_node(bus, child) { | |
685 | pr_debug(" create child: %s\n", child->full_name); | |
686 | dev = of_platform_device_create(child, NULL, parent); | |
687 | if (dev == NULL) | |
688 | rc = -ENOMEM; | |
689 | else if (!of_match_node(matches, child)) | |
690 | continue; | |
691 | if (rc == 0) { | |
692 | pr_debug(" and sub busses\n"); | |
693 | rc = of_platform_bus_create(child, matches, &dev->dev); | |
694 | } | |
695 | if (rc) { | |
696 | of_node_put(child); | |
697 | break; | |
698 | } | |
699 | } | |
700 | return rc; | |
701 | } | |
702 | ||
703 | /** | |
704 | * of_platform_bus_probe - Probe the device-tree for platform busses | |
705 | * @root: parent of the first level to probe or NULL for the root of the tree | |
706 | * @matches: match table, NULL to use the default | |
707 | * @parent: parent to hook devices from, NULL for toplevel | |
708 | * | |
709 | * Note that children of the provided root are not instantiated as devices | |
710 | * unless the specified root itself matches the bus list and is not NULL. | |
711 | */ | |
712 | int of_platform_bus_probe(struct device_node *root, | |
713 | const struct of_device_id *matches, | |
714 | struct device *parent) | |
715 | { | |
716 | struct device_node *child; | |
94a0cb1f | 717 | struct platform_device *dev; |
5fd200f3 GL |
718 | int rc = 0; |
719 | ||
c0dd394c | 720 | if (WARN_ON(!matches || matches == OF_NO_DEEP_PROBE)) |
5fd200f3 GL |
721 | return -EINVAL; |
722 | if (root == NULL) | |
723 | root = of_find_node_by_path("/"); | |
724 | else | |
725 | of_node_get(root); | |
60d59913 GL |
726 | if (root == NULL) |
727 | return -EINVAL; | |
5fd200f3 GL |
728 | |
729 | pr_debug("of_platform_bus_probe()\n"); | |
730 | pr_debug(" starting at: %s\n", root->full_name); | |
731 | ||
732 | /* Do a self check of bus type, if there's a match, create | |
733 | * children | |
734 | */ | |
735 | if (of_match_node(matches, root)) { | |
736 | pr_debug(" root match, create all sub devices\n"); | |
737 | dev = of_platform_device_create(root, NULL, parent); | |
738 | if (dev == NULL) { | |
739 | rc = -ENOMEM; | |
740 | goto bail; | |
741 | } | |
742 | pr_debug(" create all sub busses\n"); | |
743 | rc = of_platform_bus_create(root, matches, &dev->dev); | |
744 | goto bail; | |
745 | } | |
746 | for_each_child_of_node(root, child) { | |
747 | if (!of_match_node(matches, child)) | |
748 | continue; | |
749 | ||
750 | pr_debug(" match: %s\n", child->full_name); | |
751 | dev = of_platform_device_create(child, NULL, parent); | |
752 | if (dev == NULL) | |
753 | rc = -ENOMEM; | |
754 | else | |
755 | rc = of_platform_bus_create(child, matches, &dev->dev); | |
756 | if (rc) { | |
757 | of_node_put(child); | |
758 | break; | |
759 | } | |
760 | } | |
761 | bail: | |
762 | of_node_put(root); | |
763 | return rc; | |
764 | } | |
765 | EXPORT_SYMBOL(of_platform_bus_probe); | |
766 | #endif /* !CONFIG_SPARC */ |