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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 | 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 | ||
25 | static int platform_driver_probe_shim(struct platform_device *pdev) | |
26 | { | |
27 | struct platform_driver *pdrv; | |
28 | struct of_platform_driver *ofpdrv; | |
29 | const struct of_device_id *match; | |
30 | ||
31 | pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); | |
32 | ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); | |
c1b6d380 GL |
33 | |
34 | /* There is an unlikely chance that an of_platform driver might match | |
35 | * on a non-OF platform device. If so, then of_match_device() will | |
36 | * come up empty. Return -EINVAL in this case so other drivers get | |
37 | * the chance to bind. */ | |
eca39301 | 38 | match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); |
c1b6d380 | 39 | return match ? ofpdrv->probe(pdev, match) : -EINVAL; |
eca39301 GL |
40 | } |
41 | ||
42 | static void platform_driver_shutdown_shim(struct platform_device *pdev) | |
43 | { | |
44 | struct platform_driver *pdrv; | |
45 | struct of_platform_driver *ofpdrv; | |
46 | ||
47 | pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); | |
48 | ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); | |
49 | ofpdrv->shutdown(pdev); | |
50 | } | |
51 | ||
52 | /** | |
53 | * of_register_platform_driver | |
54 | */ | |
55 | int of_register_platform_driver(struct of_platform_driver *drv) | |
56 | { | |
57 | /* setup of_platform_driver to platform_driver adaptors */ | |
58 | drv->platform_driver.driver = drv->driver; | |
59 | if (drv->probe) | |
60 | drv->platform_driver.probe = platform_driver_probe_shim; | |
61 | drv->platform_driver.remove = drv->remove; | |
62 | if (drv->shutdown) | |
63 | drv->platform_driver.shutdown = platform_driver_shutdown_shim; | |
64 | drv->platform_driver.suspend = drv->suspend; | |
65 | drv->platform_driver.resume = drv->resume; | |
66 | ||
67 | return platform_driver_register(&drv->platform_driver); | |
68 | } | |
69 | EXPORT_SYMBOL(of_register_platform_driver); | |
70 | ||
71 | void of_unregister_platform_driver(struct of_platform_driver *drv) | |
72 | { | |
73 | platform_driver_unregister(&drv->platform_driver); | |
74 | } | |
75 | EXPORT_SYMBOL(of_unregister_platform_driver); | |
3f23de10 | 76 | |
596c955c GL |
77 | #if defined(CONFIG_PPC_DCR) |
78 | #include <asm/dcr.h> | |
79 | #endif | |
80 | ||
140b932f OH |
81 | extern struct device_attribute of_platform_device_attrs[]; |
82 | ||
3f23de10 SR |
83 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) |
84 | { | |
597b9d1e | 85 | const struct of_device_id *matches = drv->of_match_table; |
3f23de10 SR |
86 | |
87 | if (!matches) | |
88 | return 0; | |
89 | ||
44504b2b | 90 | return of_match_device(matches, dev) != NULL; |
3f23de10 SR |
91 | } |
92 | ||
93 | static int of_platform_device_probe(struct device *dev) | |
94 | { | |
95 | int error = -ENODEV; | |
96 | struct of_platform_driver *drv; | |
97 | struct of_device *of_dev; | |
98 | const struct of_device_id *match; | |
99 | ||
100 | drv = to_of_platform_driver(dev->driver); | |
101 | of_dev = to_of_device(dev); | |
102 | ||
103 | if (!drv->probe) | |
104 | return error; | |
105 | ||
106 | of_dev_get(of_dev); | |
107 | ||
44504b2b | 108 | match = of_match_device(drv->driver.of_match_table, dev); |
3f23de10 SR |
109 | if (match) |
110 | error = drv->probe(of_dev, match); | |
111 | if (error) | |
112 | of_dev_put(of_dev); | |
113 | ||
114 | return error; | |
115 | } | |
116 | ||
117 | static int of_platform_device_remove(struct device *dev) | |
118 | { | |
119 | struct of_device *of_dev = to_of_device(dev); | |
120 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
121 | ||
122 | if (dev->driver && drv->remove) | |
123 | drv->remove(of_dev); | |
124 | return 0; | |
125 | } | |
126 | ||
d35ef90b | 127 | static void of_platform_device_shutdown(struct device *dev) |
3f23de10 SR |
128 | { |
129 | struct of_device *of_dev = to_of_device(dev); | |
130 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
3f23de10 | 131 | |
d35ef90b AV |
132 | if (dev->driver && drv->shutdown) |
133 | drv->shutdown(of_dev); | |
3f23de10 SR |
134 | } |
135 | ||
d35ef90b AV |
136 | #ifdef CONFIG_PM_SLEEP |
137 | ||
138 | static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg) | |
3f23de10 SR |
139 | { |
140 | struct of_device *of_dev = to_of_device(dev); | |
141 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 142 | int ret = 0; |
3f23de10 | 143 | |
d35ef90b AV |
144 | if (dev->driver && drv->suspend) |
145 | ret = drv->suspend(of_dev, mesg); | |
146 | return ret; | |
3f23de10 SR |
147 | } |
148 | ||
d35ef90b | 149 | static int of_platform_legacy_resume(struct device *dev) |
a09ad3c4 ME |
150 | { |
151 | struct of_device *of_dev = to_of_device(dev); | |
152 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
d35ef90b | 153 | int ret = 0; |
a09ad3c4 | 154 | |
d35ef90b AV |
155 | if (dev->driver && drv->resume) |
156 | ret = drv->resume(of_dev); | |
157 | return ret; | |
158 | } | |
159 | ||
160 | static int of_platform_pm_prepare(struct device *dev) | |
161 | { | |
162 | struct device_driver *drv = dev->driver; | |
163 | int ret = 0; | |
164 | ||
165 | if (drv && drv->pm && drv->pm->prepare) | |
166 | ret = drv->pm->prepare(dev); | |
167 | ||
168 | return ret; | |
169 | } | |
170 | ||
171 | static void of_platform_pm_complete(struct device *dev) | |
172 | { | |
173 | struct device_driver *drv = dev->driver; | |
174 | ||
175 | if (drv && drv->pm && drv->pm->complete) | |
176 | drv->pm->complete(dev); | |
177 | } | |
178 | ||
179 | #ifdef CONFIG_SUSPEND | |
180 | ||
181 | static int of_platform_pm_suspend(struct device *dev) | |
182 | { | |
183 | struct device_driver *drv = dev->driver; | |
184 | int ret = 0; | |
185 | ||
186 | if (!drv) | |
187 | return 0; | |
188 | ||
189 | if (drv->pm) { | |
190 | if (drv->pm->suspend) | |
191 | ret = drv->pm->suspend(dev); | |
192 | } else { | |
193 | ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND); | |
194 | } | |
195 | ||
196 | return ret; | |
a09ad3c4 ME |
197 | } |
198 | ||
d35ef90b AV |
199 | static int of_platform_pm_suspend_noirq(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->suspend_noirq) | |
209 | ret = drv->pm->suspend_noirq(dev); | |
210 | } | |
211 | ||
212 | return ret; | |
213 | } | |
214 | ||
215 | static int of_platform_pm_resume(struct device *dev) | |
216 | { | |
217 | struct device_driver *drv = dev->driver; | |
218 | int ret = 0; | |
219 | ||
220 | if (!drv) | |
221 | return 0; | |
222 | ||
223 | if (drv->pm) { | |
224 | if (drv->pm->resume) | |
225 | ret = drv->pm->resume(dev); | |
226 | } else { | |
227 | ret = of_platform_legacy_resume(dev); | |
228 | } | |
229 | ||
230 | return ret; | |
231 | } | |
232 | ||
233 | static int of_platform_pm_resume_noirq(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->resume_noirq) | |
243 | ret = drv->pm->resume_noirq(dev); | |
244 | } | |
245 | ||
246 | return ret; | |
247 | } | |
248 | ||
249 | #else /* !CONFIG_SUSPEND */ | |
250 | ||
251 | #define of_platform_pm_suspend NULL | |
252 | #define of_platform_pm_resume NULL | |
253 | #define of_platform_pm_suspend_noirq NULL | |
254 | #define of_platform_pm_resume_noirq NULL | |
255 | ||
256 | #endif /* !CONFIG_SUSPEND */ | |
257 | ||
258 | #ifdef CONFIG_HIBERNATION | |
259 | ||
260 | static int of_platform_pm_freeze(struct device *dev) | |
261 | { | |
262 | struct device_driver *drv = dev->driver; | |
263 | int ret = 0; | |
264 | ||
265 | if (!drv) | |
266 | return 0; | |
267 | ||
268 | if (drv->pm) { | |
269 | if (drv->pm->freeze) | |
270 | ret = drv->pm->freeze(dev); | |
271 | } else { | |
272 | ret = of_platform_legacy_suspend(dev, PMSG_FREEZE); | |
273 | } | |
274 | ||
275 | return ret; | |
276 | } | |
277 | ||
278 | static int of_platform_pm_freeze_noirq(struct device *dev) | |
279 | { | |
280 | struct device_driver *drv = dev->driver; | |
281 | int ret = 0; | |
282 | ||
283 | if (!drv) | |
284 | return 0; | |
285 | ||
286 | if (drv->pm) { | |
287 | if (drv->pm->freeze_noirq) | |
288 | ret = drv->pm->freeze_noirq(dev); | |
289 | } | |
290 | ||
291 | return ret; | |
292 | } | |
293 | ||
294 | static int of_platform_pm_thaw(struct device *dev) | |
295 | { | |
296 | struct device_driver *drv = dev->driver; | |
297 | int ret = 0; | |
298 | ||
299 | if (!drv) | |
300 | return 0; | |
301 | ||
302 | if (drv->pm) { | |
303 | if (drv->pm->thaw) | |
304 | ret = drv->pm->thaw(dev); | |
305 | } else { | |
306 | ret = of_platform_legacy_resume(dev); | |
307 | } | |
308 | ||
309 | return ret; | |
310 | } | |
311 | ||
312 | static int of_platform_pm_thaw_noirq(struct device *dev) | |
313 | { | |
314 | struct device_driver *drv = dev->driver; | |
315 | int ret = 0; | |
316 | ||
317 | if (!drv) | |
318 | return 0; | |
319 | ||
320 | if (drv->pm) { | |
321 | if (drv->pm->thaw_noirq) | |
322 | ret = drv->pm->thaw_noirq(dev); | |
323 | } | |
324 | ||
325 | return ret; | |
326 | } | |
327 | ||
328 | static int of_platform_pm_poweroff(struct device *dev) | |
329 | { | |
330 | struct device_driver *drv = dev->driver; | |
331 | int ret = 0; | |
332 | ||
333 | if (!drv) | |
334 | return 0; | |
335 | ||
336 | if (drv->pm) { | |
337 | if (drv->pm->poweroff) | |
338 | ret = drv->pm->poweroff(dev); | |
339 | } else { | |
340 | ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE); | |
341 | } | |
342 | ||
343 | return ret; | |
344 | } | |
345 | ||
346 | static int of_platform_pm_poweroff_noirq(struct device *dev) | |
347 | { | |
348 | struct device_driver *drv = dev->driver; | |
349 | int ret = 0; | |
350 | ||
351 | if (!drv) | |
352 | return 0; | |
353 | ||
354 | if (drv->pm) { | |
355 | if (drv->pm->poweroff_noirq) | |
356 | ret = drv->pm->poweroff_noirq(dev); | |
357 | } | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
362 | static int of_platform_pm_restore(struct device *dev) | |
363 | { | |
364 | struct device_driver *drv = dev->driver; | |
365 | int ret = 0; | |
366 | ||
367 | if (!drv) | |
368 | return 0; | |
369 | ||
370 | if (drv->pm) { | |
371 | if (drv->pm->restore) | |
372 | ret = drv->pm->restore(dev); | |
373 | } else { | |
374 | ret = of_platform_legacy_resume(dev); | |
375 | } | |
376 | ||
377 | return ret; | |
378 | } | |
379 | ||
380 | static int of_platform_pm_restore_noirq(struct device *dev) | |
381 | { | |
382 | struct device_driver *drv = dev->driver; | |
383 | int ret = 0; | |
384 | ||
385 | if (!drv) | |
386 | return 0; | |
387 | ||
388 | if (drv->pm) { | |
389 | if (drv->pm->restore_noirq) | |
390 | ret = drv->pm->restore_noirq(dev); | |
391 | } | |
392 | ||
393 | return ret; | |
394 | } | |
395 | ||
396 | #else /* !CONFIG_HIBERNATION */ | |
397 | ||
398 | #define of_platform_pm_freeze NULL | |
399 | #define of_platform_pm_thaw NULL | |
400 | #define of_platform_pm_poweroff NULL | |
401 | #define of_platform_pm_restore NULL | |
402 | #define of_platform_pm_freeze_noirq NULL | |
403 | #define of_platform_pm_thaw_noirq NULL | |
404 | #define of_platform_pm_poweroff_noirq NULL | |
405 | #define of_platform_pm_restore_noirq NULL | |
406 | ||
407 | #endif /* !CONFIG_HIBERNATION */ | |
408 | ||
409 | static struct dev_pm_ops of_platform_dev_pm_ops = { | |
410 | .prepare = of_platform_pm_prepare, | |
411 | .complete = of_platform_pm_complete, | |
412 | .suspend = of_platform_pm_suspend, | |
413 | .resume = of_platform_pm_resume, | |
414 | .freeze = of_platform_pm_freeze, | |
415 | .thaw = of_platform_pm_thaw, | |
416 | .poweroff = of_platform_pm_poweroff, | |
417 | .restore = of_platform_pm_restore, | |
418 | .suspend_noirq = of_platform_pm_suspend_noirq, | |
419 | .resume_noirq = of_platform_pm_resume_noirq, | |
420 | .freeze_noirq = of_platform_pm_freeze_noirq, | |
421 | .thaw_noirq = of_platform_pm_thaw_noirq, | |
422 | .poweroff_noirq = of_platform_pm_poweroff_noirq, | |
423 | .restore_noirq = of_platform_pm_restore_noirq, | |
424 | }; | |
425 | ||
426 | #define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops) | |
427 | ||
428 | #else /* !CONFIG_PM_SLEEP */ | |
429 | ||
430 | #define OF_PLATFORM_PM_OPS_PTR NULL | |
431 | ||
432 | #endif /* !CONFIG_PM_SLEEP */ | |
433 | ||
3f23de10 SR |
434 | int of_bus_type_init(struct bus_type *bus, const char *name) |
435 | { | |
436 | bus->name = name; | |
437 | bus->match = of_platform_bus_match; | |
438 | bus->probe = of_platform_device_probe; | |
439 | bus->remove = of_platform_device_remove; | |
a09ad3c4 | 440 | bus->shutdown = of_platform_device_shutdown; |
140b932f | 441 | bus->dev_attrs = of_platform_device_attrs; |
d35ef90b | 442 | bus->pm = OF_PLATFORM_PM_OPS_PTR; |
3f23de10 SR |
443 | return bus_register(bus); |
444 | } | |
5c457083 SR |
445 | |
446 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
447 | { | |
eca39301 GL |
448 | /* |
449 | * Temporary: of_platform_bus used to be distinct from the platform | |
450 | * bus. It isn't anymore, and so drivers on the platform bus need | |
451 | * to be registered in a special way. | |
452 | * | |
453 | * After all of_platform_bus_type drivers are converted to | |
454 | * platform_drivers, this exception can be removed. | |
455 | */ | |
456 | if (bus == &platform_bus_type) | |
457 | return of_register_platform_driver(drv); | |
5c457083 SR |
458 | |
459 | /* register with core */ | |
eca39301 | 460 | drv->driver.bus = bus; |
5c457083 SR |
461 | return driver_register(&drv->driver); |
462 | } | |
463 | EXPORT_SYMBOL(of_register_driver); | |
464 | ||
465 | void of_unregister_driver(struct of_platform_driver *drv) | |
466 | { | |
eca39301 GL |
467 | if (drv->driver.bus == &platform_bus_type) |
468 | of_unregister_platform_driver(drv); | |
469 | else | |
470 | driver_unregister(&drv->driver); | |
5c457083 SR |
471 | } |
472 | EXPORT_SYMBOL(of_unregister_driver); | |
5fd200f3 GL |
473 | |
474 | #if !defined(CONFIG_SPARC) | |
475 | /* | |
476 | * The following routines scan a subtree and registers a device for | |
477 | * each applicable node. | |
478 | * | |
479 | * Note: sparc doesn't use these routines because it has a different | |
480 | * mechanism for creating devices from device tree nodes. | |
481 | */ | |
482 | ||
94c09319 GL |
483 | /** |
484 | * of_device_make_bus_id - Use the device node data to assign a unique name | |
485 | * @dev: pointer to device structure that is linked to a device tree node | |
486 | * | |
487 | * This routine will first try using either the dcr-reg or the reg property | |
488 | * value to derive a unique name. As a last resort it will use the node | |
489 | * name followed by a unique number. | |
490 | */ | |
491 | static void of_device_make_bus_id(struct device *dev) | |
492 | { | |
493 | static atomic_t bus_no_reg_magic; | |
494 | struct device_node *node = dev->of_node; | |
495 | const u32 *reg; | |
496 | u64 addr; | |
497 | int magic; | |
498 | ||
499 | #ifdef CONFIG_PPC_DCR | |
500 | /* | |
501 | * If it's a DCR based device, use 'd' for native DCRs | |
502 | * and 'D' for MMIO DCRs. | |
503 | */ | |
504 | reg = of_get_property(node, "dcr-reg", NULL); | |
505 | if (reg) { | |
506 | #ifdef CONFIG_PPC_DCR_NATIVE | |
507 | dev_set_name(dev, "d%x.%s", *reg, node->name); | |
508 | #else /* CONFIG_PPC_DCR_NATIVE */ | |
509 | u64 addr = of_translate_dcr_address(node, *reg, NULL); | |
510 | if (addr != OF_BAD_ADDR) { | |
511 | dev_set_name(dev, "D%llx.%s", | |
512 | (unsigned long long)addr, node->name); | |
513 | return; | |
514 | } | |
515 | #endif /* !CONFIG_PPC_DCR_NATIVE */ | |
516 | } | |
517 | #endif /* CONFIG_PPC_DCR */ | |
518 | ||
519 | /* | |
520 | * For MMIO, get the physical address | |
521 | */ | |
522 | reg = of_get_property(node, "reg", NULL); | |
523 | if (reg) { | |
524 | addr = of_translate_address(node, reg); | |
525 | if (addr != OF_BAD_ADDR) { | |
526 | dev_set_name(dev, "%llx.%s", | |
527 | (unsigned long long)addr, node->name); | |
528 | return; | |
529 | } | |
530 | } | |
531 | ||
532 | /* | |
533 | * No BusID, use the node name and add a globally incremented | |
534 | * counter (and pray...) | |
535 | */ | |
536 | magic = atomic_add_return(1, &bus_no_reg_magic); | |
537 | dev_set_name(dev, "%s.%d", node->name, magic - 1); | |
538 | } | |
539 | ||
540 | /** | |
541 | * of_device_alloc - Allocate and initialize an of_device | |
542 | * @np: device node to assign to device | |
543 | * @bus_id: Name to assign to the device. May be null to use default name. | |
544 | * @parent: Parent device. | |
545 | */ | |
546 | struct of_device *of_device_alloc(struct device_node *np, | |
547 | const char *bus_id, | |
548 | struct device *parent) | |
549 | { | |
550 | struct of_device *dev; | |
ac80a51e GL |
551 | int rc, i, num_reg = 0, num_irq = 0; |
552 | struct resource *res, temp_res; | |
553 | ||
554 | /* First count how many resources are needed */ | |
555 | while (of_address_to_resource(np, num_reg, &temp_res) == 0) | |
556 | num_reg++; | |
557 | while (of_irq_to_resource(np, num_irq, &temp_res) != NO_IRQ) | |
558 | num_irq++; | |
559 | ||
560 | /* Allocate memory for both the struct device and the resource table */ | |
561 | dev = kzalloc(sizeof(*dev) + (sizeof(*res) * (num_reg + num_irq)), | |
562 | GFP_KERNEL); | |
94c09319 GL |
563 | if (!dev) |
564 | return NULL; | |
ac80a51e GL |
565 | res = (struct resource *) &dev[1]; |
566 | ||
567 | /* Populate the resource table */ | |
568 | if (num_irq || num_reg) { | |
569 | dev->num_resources = num_reg + num_irq; | |
570 | dev->resource = res; | |
571 | for (i = 0; i < num_reg; i++, res++) { | |
572 | rc = of_address_to_resource(np, i, res); | |
573 | WARN_ON(rc); | |
574 | } | |
575 | for (i = 0; i < num_irq; i++, res++) { | |
576 | rc = of_irq_to_resource(np, i, res); | |
577 | WARN_ON(rc == NO_IRQ); | |
578 | } | |
579 | } | |
94c09319 GL |
580 | |
581 | dev->dev.of_node = of_node_get(np); | |
9e3288dc | 582 | #if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE) |
94c09319 | 583 | dev->dev.dma_mask = &dev->archdata.dma_mask; |
9e3288dc | 584 | #endif |
94c09319 GL |
585 | dev->dev.parent = parent; |
586 | dev->dev.release = of_release_dev; | |
587 | ||
588 | if (bus_id) | |
589 | dev_set_name(&dev->dev, "%s", bus_id); | |
590 | else | |
591 | of_device_make_bus_id(&dev->dev); | |
592 | ||
593 | return dev; | |
594 | } | |
595 | EXPORT_SYMBOL(of_device_alloc); | |
596 | ||
5fd200f3 GL |
597 | /** |
598 | * of_platform_device_create - Alloc, initialize and register an of_device | |
599 | * @np: pointer to node to create device for | |
600 | * @bus_id: name to assign device | |
601 | * @parent: Linux device model parent device. | |
602 | */ | |
603 | struct of_device *of_platform_device_create(struct device_node *np, | |
604 | const char *bus_id, | |
605 | struct device *parent) | |
606 | { | |
607 | struct of_device *dev; | |
608 | ||
609 | dev = of_device_alloc(np, bus_id, parent); | |
610 | if (!dev) | |
611 | return NULL; | |
612 | ||
9e3288dc | 613 | #if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE) |
5fd200f3 | 614 | dev->archdata.dma_mask = 0xffffffffUL; |
9e3288dc | 615 | #endif |
5fd200f3 | 616 | dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
eca39301 | 617 | dev->dev.bus = &platform_bus_type; |
5fd200f3 GL |
618 | |
619 | /* We do not fill the DMA ops for platform devices by default. | |
620 | * This is currently the responsibility of the platform code | |
621 | * to do such, possibly using a device notifier | |
622 | */ | |
623 | ||
624 | if (of_device_register(dev) != 0) { | |
625 | of_device_free(dev); | |
626 | return NULL; | |
627 | } | |
628 | ||
629 | return dev; | |
630 | } | |
631 | EXPORT_SYMBOL(of_platform_device_create); | |
632 | ||
633 | /** | |
634 | * of_platform_bus_create - Create an OF device for a bus node and all its | |
635 | * children. Optionally recursively instantiate matching busses. | |
636 | * @bus: device node of the bus to instantiate | |
637 | * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to | |
638 | * disallow recursive creation of child busses | |
639 | */ | |
640 | static int of_platform_bus_create(const struct device_node *bus, | |
641 | const struct of_device_id *matches, | |
642 | struct device *parent) | |
643 | { | |
644 | struct device_node *child; | |
645 | struct of_device *dev; | |
646 | int rc = 0; | |
647 | ||
648 | for_each_child_of_node(bus, child) { | |
649 | pr_debug(" create child: %s\n", child->full_name); | |
650 | dev = of_platform_device_create(child, NULL, parent); | |
651 | if (dev == NULL) | |
652 | rc = -ENOMEM; | |
653 | else if (!of_match_node(matches, child)) | |
654 | continue; | |
655 | if (rc == 0) { | |
656 | pr_debug(" and sub busses\n"); | |
657 | rc = of_platform_bus_create(child, matches, &dev->dev); | |
658 | } | |
659 | if (rc) { | |
660 | of_node_put(child); | |
661 | break; | |
662 | } | |
663 | } | |
664 | return rc; | |
665 | } | |
666 | ||
667 | /** | |
668 | * of_platform_bus_probe - Probe the device-tree for platform busses | |
669 | * @root: parent of the first level to probe or NULL for the root of the tree | |
670 | * @matches: match table, NULL to use the default | |
671 | * @parent: parent to hook devices from, NULL for toplevel | |
672 | * | |
673 | * Note that children of the provided root are not instantiated as devices | |
674 | * unless the specified root itself matches the bus list and is not NULL. | |
675 | */ | |
676 | int of_platform_bus_probe(struct device_node *root, | |
677 | const struct of_device_id *matches, | |
678 | struct device *parent) | |
679 | { | |
680 | struct device_node *child; | |
681 | struct of_device *dev; | |
682 | int rc = 0; | |
683 | ||
684 | if (matches == NULL) | |
685 | matches = of_default_bus_ids; | |
686 | if (matches == OF_NO_DEEP_PROBE) | |
687 | return -EINVAL; | |
688 | if (root == NULL) | |
689 | root = of_find_node_by_path("/"); | |
690 | else | |
691 | of_node_get(root); | |
60d59913 GL |
692 | if (root == NULL) |
693 | return -EINVAL; | |
5fd200f3 GL |
694 | |
695 | pr_debug("of_platform_bus_probe()\n"); | |
696 | pr_debug(" starting at: %s\n", root->full_name); | |
697 | ||
698 | /* Do a self check of bus type, if there's a match, create | |
699 | * children | |
700 | */ | |
701 | if (of_match_node(matches, root)) { | |
702 | pr_debug(" root match, create all sub devices\n"); | |
703 | dev = of_platform_device_create(root, NULL, parent); | |
704 | if (dev == NULL) { | |
705 | rc = -ENOMEM; | |
706 | goto bail; | |
707 | } | |
708 | pr_debug(" create all sub busses\n"); | |
709 | rc = of_platform_bus_create(root, matches, &dev->dev); | |
710 | goto bail; | |
711 | } | |
712 | for_each_child_of_node(root, child) { | |
713 | if (!of_match_node(matches, child)) | |
714 | continue; | |
715 | ||
716 | pr_debug(" match: %s\n", child->full_name); | |
717 | dev = of_platform_device_create(child, NULL, parent); | |
718 | if (dev == NULL) | |
719 | rc = -ENOMEM; | |
720 | else | |
721 | rc = of_platform_bus_create(child, matches, &dev->dev); | |
722 | if (rc) { | |
723 | of_node_put(child); | |
724 | break; | |
725 | } | |
726 | } | |
727 | bail: | |
728 | of_node_put(root); | |
729 | return rc; | |
730 | } | |
731 | EXPORT_SYMBOL(of_platform_bus_probe); | |
732 | #endif /* !CONFIG_SPARC */ |