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 SR |
22 | #include <linux/of_platform.h> |
23 | ||
596c955c GL |
24 | #if defined(CONFIG_PPC_DCR) |
25 | #include <asm/dcr.h> | |
26 | #endif | |
27 | ||
140b932f OH |
28 | extern struct device_attribute of_platform_device_attrs[]; |
29 | ||
3f23de10 SR |
30 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) |
31 | { | |
597b9d1e | 32 | const struct of_device_id *matches = drv->of_match_table; |
3f23de10 SR |
33 | |
34 | if (!matches) | |
35 | return 0; | |
36 | ||
44504b2b | 37 | return of_match_device(matches, dev) != NULL; |
3f23de10 SR |
38 | } |
39 | ||
40 | static int of_platform_device_probe(struct device *dev) | |
41 | { | |
42 | int error = -ENODEV; | |
43 | struct of_platform_driver *drv; | |
44 | struct of_device *of_dev; | |
45 | const struct of_device_id *match; | |
46 | ||
47 | drv = to_of_platform_driver(dev->driver); | |
48 | of_dev = to_of_device(dev); | |
49 | ||
50 | if (!drv->probe) | |
51 | return error; | |
52 | ||
53 | of_dev_get(of_dev); | |
54 | ||
44504b2b | 55 | match = of_match_device(drv->driver.of_match_table, dev); |
3f23de10 SR |
56 | if (match) |
57 | error = drv->probe(of_dev, match); | |
58 | if (error) | |
59 | of_dev_put(of_dev); | |
60 | ||
61 | return error; | |
62 | } | |
63 | ||
64 | static int of_platform_device_remove(struct device *dev) | |
65 | { | |
66 | struct of_device *of_dev = to_of_device(dev); | |
67 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
68 | ||
69 | if (dev->driver && drv->remove) | |
70 | drv->remove(of_dev); | |
71 | return 0; | |
72 | } | |
73 | ||
d35ef90b | 74 | static void of_platform_device_shutdown(struct device *dev) |
3f23de10 SR |
75 | { |
76 | struct of_device *of_dev = to_of_device(dev); | |
77 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
3f23de10 | 78 | |
d35ef90b AV |
79 | if (dev->driver && drv->shutdown) |
80 | drv->shutdown(of_dev); | |
3f23de10 SR |
81 | } |
82 | ||
d35ef90b AV |
83 | #ifdef CONFIG_PM_SLEEP |
84 | ||
85 | static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
3f23de10 SR |
86 | { |
87 | struct of_device *of_dev = to_of_device(dev); | |
88 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 89 | int ret = 0; |
3f23de10 | 90 | |
d35ef90b AV |
91 | if (dev->driver && drv->suspend) |
92 | ret = drv->suspend(of_dev, mesg); | |
93 | return ret; | |
3f23de10 SR |
94 | } |
95 | ||
d35ef90b | 96 | static int of_platform_legacy_resume(struct device *dev) |
a09ad3c4 ME |
97 | { |
98 | struct of_device *of_dev = to_of_device(dev); | |
99 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 100 | int ret = 0; |
a09ad3c4 | 101 | |
d35ef90b AV |
102 | if (dev->driver && drv->resume) |
103 | ret = drv->resume(of_dev); | |
104 | return ret; | |
105 | } | |
106 | ||
107 | static int of_platform_pm_prepare(struct device *dev) | |
108 | { | |
109 | struct device_driver *drv = dev->driver; | |
110 | int ret = 0; | |
111 | ||
112 | if (drv && drv->pm && drv->pm->prepare) | |
113 | ret = drv->pm->prepare(dev); | |
114 | ||
115 | return ret; | |
116 | } | |
117 | ||
118 | static void of_platform_pm_complete(struct device *dev) | |
119 | { | |
120 | struct device_driver *drv = dev->driver; | |
121 | ||
122 | if (drv && drv->pm && drv->pm->complete) | |
123 | drv->pm->complete(dev); | |
124 | } | |
125 | ||
126 | #ifdef CONFIG_SUSPEND | |
127 | ||
128 | static int of_platform_pm_suspend(struct device *dev) | |
129 | { | |
130 | struct device_driver *drv = dev->driver; | |
131 | int ret = 0; | |
132 | ||
133 | if (!drv) | |
134 | return 0; | |
135 | ||
136 | if (drv->pm) { | |
137 | if (drv->pm->suspend) | |
138 | ret = drv->pm->suspend(dev); | |
139 | } else { | |
140 | ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND); | |
141 | } | |
142 | ||
143 | return ret; | |
a09ad3c4 ME |
144 | } |
145 | ||
d35ef90b AV |
146 | static int of_platform_pm_suspend_noirq(struct device *dev) |
147 | { | |
148 | struct device_driver *drv = dev->driver; | |
149 | int ret = 0; | |
150 | ||
151 | if (!drv) | |
152 | return 0; | |
153 | ||
154 | if (drv->pm) { | |
155 | if (drv->pm->suspend_noirq) | |
156 | ret = drv->pm->suspend_noirq(dev); | |
157 | } | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
162 | static int of_platform_pm_resume(struct device *dev) | |
163 | { | |
164 | struct device_driver *drv = dev->driver; | |
165 | int ret = 0; | |
166 | ||
167 | if (!drv) | |
168 | return 0; | |
169 | ||
170 | if (drv->pm) { | |
171 | if (drv->pm->resume) | |
172 | ret = drv->pm->resume(dev); | |
173 | } else { | |
174 | ret = of_platform_legacy_resume(dev); | |
175 | } | |
176 | ||
177 | return ret; | |
178 | } | |
179 | ||
180 | static int of_platform_pm_resume_noirq(struct device *dev) | |
181 | { | |
182 | struct device_driver *drv = dev->driver; | |
183 | int ret = 0; | |
184 | ||
185 | if (!drv) | |
186 | return 0; | |
187 | ||
188 | if (drv->pm) { | |
189 | if (drv->pm->resume_noirq) | |
190 | ret = drv->pm->resume_noirq(dev); | |
191 | } | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
196 | #else /* !CONFIG_SUSPEND */ | |
197 | ||
198 | #define of_platform_pm_suspend NULL | |
199 | #define of_platform_pm_resume NULL | |
200 | #define of_platform_pm_suspend_noirq NULL | |
201 | #define of_platform_pm_resume_noirq NULL | |
202 | ||
203 | #endif /* !CONFIG_SUSPEND */ | |
204 | ||
205 | #ifdef CONFIG_HIBERNATION | |
206 | ||
207 | static int of_platform_pm_freeze(struct device *dev) | |
208 | { | |
209 | struct device_driver *drv = dev->driver; | |
210 | int ret = 0; | |
211 | ||
212 | if (!drv) | |
213 | return 0; | |
214 | ||
215 | if (drv->pm) { | |
216 | if (drv->pm->freeze) | |
217 | ret = drv->pm->freeze(dev); | |
218 | } else { | |
219 | ret = of_platform_legacy_suspend(dev, PMSG_FREEZE); | |
220 | } | |
221 | ||
222 | return ret; | |
223 | } | |
224 | ||
225 | static int of_platform_pm_freeze_noirq(struct device *dev) | |
226 | { | |
227 | struct device_driver *drv = dev->driver; | |
228 | int ret = 0; | |
229 | ||
230 | if (!drv) | |
231 | return 0; | |
232 | ||
233 | if (drv->pm) { | |
234 | if (drv->pm->freeze_noirq) | |
235 | ret = drv->pm->freeze_noirq(dev); | |
236 | } | |
237 | ||
238 | return ret; | |
239 | } | |
240 | ||
241 | static int of_platform_pm_thaw(struct device *dev) | |
242 | { | |
243 | struct device_driver *drv = dev->driver; | |
244 | int ret = 0; | |
245 | ||
246 | if (!drv) | |
247 | return 0; | |
248 | ||
249 | if (drv->pm) { | |
250 | if (drv->pm->thaw) | |
251 | ret = drv->pm->thaw(dev); | |
252 | } else { | |
253 | ret = of_platform_legacy_resume(dev); | |
254 | } | |
255 | ||
256 | return ret; | |
257 | } | |
258 | ||
259 | static int of_platform_pm_thaw_noirq(struct device *dev) | |
260 | { | |
261 | struct device_driver *drv = dev->driver; | |
262 | int ret = 0; | |
263 | ||
264 | if (!drv) | |
265 | return 0; | |
266 | ||
267 | if (drv->pm) { | |
268 | if (drv->pm->thaw_noirq) | |
269 | ret = drv->pm->thaw_noirq(dev); | |
270 | } | |
271 | ||
272 | return ret; | |
273 | } | |
274 | ||
275 | static int of_platform_pm_poweroff(struct device *dev) | |
276 | { | |
277 | struct device_driver *drv = dev->driver; | |
278 | int ret = 0; | |
279 | ||
280 | if (!drv) | |
281 | return 0; | |
282 | ||
283 | if (drv->pm) { | |
284 | if (drv->pm->poweroff) | |
285 | ret = drv->pm->poweroff(dev); | |
286 | } else { | |
287 | ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
288 | } | |
289 | ||
290 | return ret; | |
291 | } | |
292 | ||
293 | static int of_platform_pm_poweroff_noirq(struct device *dev) | |
294 | { | |
295 | struct device_driver *drv = dev->driver; | |
296 | int ret = 0; | |
297 | ||
298 | if (!drv) | |
299 | return 0; | |
300 | ||
301 | if (drv->pm) { | |
302 | if (drv->pm->poweroff_noirq) | |
303 | ret = drv->pm->poweroff_noirq(dev); | |
304 | } | |
305 | ||
306 | return ret; | |
307 | } | |
308 | ||
309 | static int of_platform_pm_restore(struct device *dev) | |
310 | { | |
311 | struct device_driver *drv = dev->driver; | |
312 | int ret = 0; | |
313 | ||
314 | if (!drv) | |
315 | return 0; | |
316 | ||
317 | if (drv->pm) { | |
318 | if (drv->pm->restore) | |
319 | ret = drv->pm->restore(dev); | |
320 | } else { | |
321 | ret = of_platform_legacy_resume(dev); | |
322 | } | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
327 | static int of_platform_pm_restore_noirq(struct device *dev) | |
328 | { | |
329 | struct device_driver *drv = dev->driver; | |
330 | int ret = 0; | |
331 | ||
332 | if (!drv) | |
333 | return 0; | |
334 | ||
335 | if (drv->pm) { | |
336 | if (drv->pm->restore_noirq) | |
337 | ret = drv->pm->restore_noirq(dev); | |
338 | } | |
339 | ||
340 | return ret; | |
341 | } | |
342 | ||
343 | #else /* !CONFIG_HIBERNATION */ | |
344 | ||
345 | #define of_platform_pm_freeze NULL | |
346 | #define of_platform_pm_thaw NULL | |
347 | #define of_platform_pm_poweroff NULL | |
348 | #define of_platform_pm_restore NULL | |
349 | #define of_platform_pm_freeze_noirq NULL | |
350 | #define of_platform_pm_thaw_noirq NULL | |
351 | #define of_platform_pm_poweroff_noirq NULL | |
352 | #define of_platform_pm_restore_noirq NULL | |
353 | ||
354 | #endif /* !CONFIG_HIBERNATION */ | |
355 | ||
356 | static struct dev_pm_ops of_platform_dev_pm_ops = { | |
357 | .prepare = of_platform_pm_prepare, | |
358 | .complete = of_platform_pm_complete, | |
359 | .suspend = of_platform_pm_suspend, | |
360 | .resume = of_platform_pm_resume, | |
361 | .freeze = of_platform_pm_freeze, | |
362 | .thaw = of_platform_pm_thaw, | |
363 | .poweroff = of_platform_pm_poweroff, | |
364 | .restore = of_platform_pm_restore, | |
365 | .suspend_noirq = of_platform_pm_suspend_noirq, | |
366 | .resume_noirq = of_platform_pm_resume_noirq, | |
367 | .freeze_noirq = of_platform_pm_freeze_noirq, | |
368 | .thaw_noirq = of_platform_pm_thaw_noirq, | |
369 | .poweroff_noirq = of_platform_pm_poweroff_noirq, | |
370 | .restore_noirq = of_platform_pm_restore_noirq, | |
371 | }; | |
372 | ||
373 | #define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops) | |
374 | ||
375 | #else /* !CONFIG_PM_SLEEP */ | |
376 | ||
377 | #define OF_PLATFORM_PM_OPS_PTR NULL | |
378 | ||
379 | #endif /* !CONFIG_PM_SLEEP */ | |
380 | ||
3f23de10 SR |
381 | int of_bus_type_init(struct bus_type *bus, const char *name) |
382 | { | |
383 | bus->name = name; | |
384 | bus->match = of_platform_bus_match; | |
385 | bus->probe = of_platform_device_probe; | |
386 | bus->remove = of_platform_device_remove; | |
a09ad3c4 | 387 | bus->shutdown = of_platform_device_shutdown; |
140b932f | 388 | bus->dev_attrs = of_platform_device_attrs; |
d35ef90b | 389 | bus->pm = OF_PLATFORM_PM_OPS_PTR; |
3f23de10 SR |
390 | return bus_register(bus); |
391 | } | |
5c457083 SR |
392 | |
393 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
394 | { | |
5c457083 SR |
395 | drv->driver.bus = bus; |
396 | ||
397 | /* register with core */ | |
398 | return driver_register(&drv->driver); | |
399 | } | |
400 | EXPORT_SYMBOL(of_register_driver); | |
401 | ||
402 | void of_unregister_driver(struct of_platform_driver *drv) | |
403 | { | |
404 | driver_unregister(&drv->driver); | |
405 | } | |
406 | EXPORT_SYMBOL(of_unregister_driver); | |
5fd200f3 GL |
407 | |
408 | #if !defined(CONFIG_SPARC) | |
409 | /* | |
410 | * The following routines scan a subtree and registers a device for | |
411 | * each applicable node. | |
412 | * | |
413 | * Note: sparc doesn't use these routines because it has a different | |
414 | * mechanism for creating devices from device tree nodes. | |
415 | */ | |
416 | ||
94c09319 GL |
417 | /** |
418 | * of_device_make_bus_id - Use the device node data to assign a unique name | |
419 | * @dev: pointer to device structure that is linked to a device tree node | |
420 | * | |
421 | * This routine will first try using either the dcr-reg or the reg property | |
422 | * value to derive a unique name. As a last resort it will use the node | |
423 | * name followed by a unique number. | |
424 | */ | |
425 | static void of_device_make_bus_id(struct device *dev) | |
426 | { | |
427 | static atomic_t bus_no_reg_magic; | |
428 | struct device_node *node = dev->of_node; | |
429 | const u32 *reg; | |
430 | u64 addr; | |
431 | int magic; | |
432 | ||
433 | #ifdef CONFIG_PPC_DCR | |
434 | /* | |
435 | * If it's a DCR based device, use 'd' for native DCRs | |
436 | * and 'D' for MMIO DCRs. | |
437 | */ | |
438 | reg = of_get_property(node, "dcr-reg", NULL); | |
439 | if (reg) { | |
440 | #ifdef CONFIG_PPC_DCR_NATIVE | |
441 | dev_set_name(dev, "d%x.%s", *reg, node->name); | |
442 | #else /* CONFIG_PPC_DCR_NATIVE */ | |
443 | u64 addr = of_translate_dcr_address(node, *reg, NULL); | |
444 | if (addr != OF_BAD_ADDR) { | |
445 | dev_set_name(dev, "D%llx.%s", | |
446 | (unsigned long long)addr, node->name); | |
447 | return; | |
448 | } | |
449 | #endif /* !CONFIG_PPC_DCR_NATIVE */ | |
450 | } | |
451 | #endif /* CONFIG_PPC_DCR */ | |
452 | ||
453 | /* | |
454 | * For MMIO, get the physical address | |
455 | */ | |
456 | reg = of_get_property(node, "reg", NULL); | |
457 | if (reg) { | |
458 | addr = of_translate_address(node, reg); | |
459 | if (addr != OF_BAD_ADDR) { | |
460 | dev_set_name(dev, "%llx.%s", | |
461 | (unsigned long long)addr, node->name); | |
462 | return; | |
463 | } | |
464 | } | |
465 | ||
466 | /* | |
467 | * No BusID, use the node name and add a globally incremented | |
468 | * counter (and pray...) | |
469 | */ | |
470 | magic = atomic_add_return(1, &bus_no_reg_magic); | |
471 | dev_set_name(dev, "%s.%d", node->name, magic - 1); | |
472 | } | |
473 | ||
474 | /** | |
475 | * of_device_alloc - Allocate and initialize an of_device | |
476 | * @np: device node to assign to device | |
477 | * @bus_id: Name to assign to the device. May be null to use default name. | |
478 | * @parent: Parent device. | |
479 | */ | |
480 | struct of_device *of_device_alloc(struct device_node *np, | |
481 | const char *bus_id, | |
482 | struct device *parent) | |
483 | { | |
484 | struct of_device *dev; | |
ac80a51e GL |
485 | int rc, i, num_reg = 0, num_irq = 0; |
486 | struct resource *res, temp_res; | |
487 | ||
488 | /* First count how many resources are needed */ | |
489 | while (of_address_to_resource(np, num_reg, &temp_res) == 0) | |
490 | num_reg++; | |
491 | while (of_irq_to_resource(np, num_irq, &temp_res) != NO_IRQ) | |
492 | num_irq++; | |
493 | ||
494 | /* Allocate memory for both the struct device and the resource table */ | |
495 | dev = kzalloc(sizeof(*dev) + (sizeof(*res) * (num_reg + num_irq)), | |
496 | GFP_KERNEL); | |
94c09319 GL |
497 | if (!dev) |
498 | return NULL; | |
ac80a51e GL |
499 | res = (struct resource *) &dev[1]; |
500 | ||
501 | /* Populate the resource table */ | |
502 | if (num_irq || num_reg) { | |
503 | dev->num_resources = num_reg + num_irq; | |
504 | dev->resource = res; | |
505 | for (i = 0; i < num_reg; i++, res++) { | |
506 | rc = of_address_to_resource(np, i, res); | |
507 | WARN_ON(rc); | |
508 | } | |
509 | for (i = 0; i < num_irq; i++, res++) { | |
510 | rc = of_irq_to_resource(np, i, res); | |
511 | WARN_ON(rc == NO_IRQ); | |
512 | } | |
513 | } | |
94c09319 GL |
514 | |
515 | dev->dev.of_node = of_node_get(np); | |
9e3288dc | 516 | #if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE) |
94c09319 | 517 | dev->dev.dma_mask = &dev->archdata.dma_mask; |
9e3288dc | 518 | #endif |
94c09319 GL |
519 | dev->dev.parent = parent; |
520 | dev->dev.release = of_release_dev; | |
521 | ||
522 | if (bus_id) | |
523 | dev_set_name(&dev->dev, "%s", bus_id); | |
524 | else | |
525 | of_device_make_bus_id(&dev->dev); | |
526 | ||
527 | return dev; | |
528 | } | |
529 | EXPORT_SYMBOL(of_device_alloc); | |
530 | ||
5fd200f3 GL |
531 | /** |
532 | * of_platform_device_create - Alloc, initialize and register an of_device | |
533 | * @np: pointer to node to create device for | |
534 | * @bus_id: name to assign device | |
535 | * @parent: Linux device model parent device. | |
536 | */ | |
537 | struct of_device *of_platform_device_create(struct device_node *np, | |
538 | const char *bus_id, | |
539 | struct device *parent) | |
540 | { | |
541 | struct of_device *dev; | |
542 | ||
543 | dev = of_device_alloc(np, bus_id, parent); | |
544 | if (!dev) | |
545 | return NULL; | |
546 | ||
9e3288dc | 547 | #if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE) |
5fd200f3 | 548 | dev->archdata.dma_mask = 0xffffffffUL; |
9e3288dc | 549 | #endif |
5fd200f3 GL |
550 | dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
551 | dev->dev.bus = &of_platform_bus_type; | |
552 | ||
553 | /* We do not fill the DMA ops for platform devices by default. | |
554 | * This is currently the responsibility of the platform code | |
555 | * to do such, possibly using a device notifier | |
556 | */ | |
557 | ||
558 | if (of_device_register(dev) != 0) { | |
559 | of_device_free(dev); | |
560 | return NULL; | |
561 | } | |
562 | ||
563 | return dev; | |
564 | } | |
565 | EXPORT_SYMBOL(of_platform_device_create); | |
566 | ||
567 | /** | |
568 | * of_platform_bus_create - Create an OF device for a bus node and all its | |
569 | * children. Optionally recursively instantiate matching busses. | |
570 | * @bus: device node of the bus to instantiate | |
571 | * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to | |
572 | * disallow recursive creation of child busses | |
573 | */ | |
574 | static int of_platform_bus_create(const struct device_node *bus, | |
575 | const struct of_device_id *matches, | |
576 | struct device *parent) | |
577 | { | |
578 | struct device_node *child; | |
579 | struct of_device *dev; | |
580 | int rc = 0; | |
581 | ||
582 | for_each_child_of_node(bus, child) { | |
583 | pr_debug(" create child: %s\n", child->full_name); | |
584 | dev = of_platform_device_create(child, NULL, parent); | |
585 | if (dev == NULL) | |
586 | rc = -ENOMEM; | |
587 | else if (!of_match_node(matches, child)) | |
588 | continue; | |
589 | if (rc == 0) { | |
590 | pr_debug(" and sub busses\n"); | |
591 | rc = of_platform_bus_create(child, matches, &dev->dev); | |
592 | } | |
593 | if (rc) { | |
594 | of_node_put(child); | |
595 | break; | |
596 | } | |
597 | } | |
598 | return rc; | |
599 | } | |
600 | ||
601 | /** | |
602 | * of_platform_bus_probe - Probe the device-tree for platform busses | |
603 | * @root: parent of the first level to probe or NULL for the root of the tree | |
604 | * @matches: match table, NULL to use the default | |
605 | * @parent: parent to hook devices from, NULL for toplevel | |
606 | * | |
607 | * Note that children of the provided root are not instantiated as devices | |
608 | * unless the specified root itself matches the bus list and is not NULL. | |
609 | */ | |
610 | int of_platform_bus_probe(struct device_node *root, | |
611 | const struct of_device_id *matches, | |
612 | struct device *parent) | |
613 | { | |
614 | struct device_node *child; | |
615 | struct of_device *dev; | |
616 | int rc = 0; | |
617 | ||
618 | if (matches == NULL) | |
619 | matches = of_default_bus_ids; | |
620 | if (matches == OF_NO_DEEP_PROBE) | |
621 | return -EINVAL; | |
622 | if (root == NULL) | |
623 | root = of_find_node_by_path("/"); | |
624 | else | |
625 | of_node_get(root); | |
60d59913 GL |
626 | if (root == NULL) |
627 | return -EINVAL; | |
5fd200f3 GL |
628 | |
629 | pr_debug("of_platform_bus_probe()\n"); | |
630 | pr_debug(" starting at: %s\n", root->full_name); | |
631 | ||
632 | /* Do a self check of bus type, if there's a match, create | |
633 | * children | |
634 | */ | |
635 | if (of_match_node(matches, root)) { | |
636 | pr_debug(" root match, create all sub devices\n"); | |
637 | dev = of_platform_device_create(root, NULL, parent); | |
638 | if (dev == NULL) { | |
639 | rc = -ENOMEM; | |
640 | goto bail; | |
641 | } | |
642 | pr_debug(" create all sub busses\n"); | |
643 | rc = of_platform_bus_create(root, matches, &dev->dev); | |
644 | goto bail; | |
645 | } | |
646 | for_each_child_of_node(root, child) { | |
647 | if (!of_match_node(matches, child)) | |
648 | continue; | |
649 | ||
650 | pr_debug(" match: %s\n", child->full_name); | |
651 | dev = of_platform_device_create(child, NULL, parent); | |
652 | if (dev == NULL) | |
653 | rc = -ENOMEM; | |
654 | else | |
655 | rc = of_platform_bus_create(child, matches, &dev->dev); | |
656 | if (rc) { | |
657 | of_node_put(child); | |
658 | break; | |
659 | } | |
660 | } | |
661 | bail: | |
662 | of_node_put(root); | |
663 | return rc; | |
664 | } | |
665 | EXPORT_SYMBOL(of_platform_bus_probe); | |
666 | #endif /* !CONFIG_SPARC */ |