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fd531431 DM |
1 | #include <linux/config.h> |
2 | #include <linux/string.h> | |
3 | #include <linux/kernel.h> | |
4 | #include <linux/init.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/mod_devicetable.h> | |
7 | #include <linux/slab.h> | |
8 | ||
9 | #include <asm/errno.h> | |
10 | #include <asm/of_device.h> | |
11 | ||
12 | /** | |
13 | * of_match_device - Tell if an of_device structure has a matching | |
14 | * of_match structure | |
15 | * @ids: array of of device match structures to search in | |
16 | * @dev: the of device structure to match against | |
17 | * | |
18 | * Used by a driver to check whether an of_device present in the | |
19 | * system is in its list of supported devices. | |
20 | */ | |
21 | const struct of_device_id *of_match_device(const struct of_device_id *matches, | |
22 | const struct of_device *dev) | |
23 | { | |
24 | if (!dev->node) | |
25 | return NULL; | |
26 | while (matches->name[0] || matches->type[0] || matches->compatible[0]) { | |
27 | int match = 1; | |
28 | if (matches->name[0]) | |
29 | match &= dev->node->name | |
30 | && !strcmp(matches->name, dev->node->name); | |
31 | if (matches->type[0]) | |
32 | match &= dev->node->type | |
33 | && !strcmp(matches->type, dev->node->type); | |
34 | if (matches->compatible[0]) | |
35 | match &= of_device_is_compatible(dev->node, | |
36 | matches->compatible); | |
37 | if (match) | |
38 | return matches; | |
39 | matches++; | |
40 | } | |
41 | return NULL; | |
42 | } | |
43 | ||
44 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) | |
45 | { | |
46 | struct of_device * of_dev = to_of_device(dev); | |
47 | struct of_platform_driver * of_drv = to_of_platform_driver(drv); | |
48 | const struct of_device_id * matches = of_drv->match_table; | |
49 | ||
50 | if (!matches) | |
51 | return 0; | |
52 | ||
53 | return of_match_device(matches, of_dev) != NULL; | |
54 | } | |
55 | ||
56 | struct of_device *of_dev_get(struct of_device *dev) | |
57 | { | |
58 | struct device *tmp; | |
59 | ||
60 | if (!dev) | |
61 | return NULL; | |
62 | tmp = get_device(&dev->dev); | |
63 | if (tmp) | |
64 | return to_of_device(tmp); | |
65 | else | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | void of_dev_put(struct of_device *dev) | |
70 | { | |
71 | if (dev) | |
72 | put_device(&dev->dev); | |
73 | } | |
74 | ||
75 | ||
76 | static int of_device_probe(struct device *dev) | |
77 | { | |
78 | int error = -ENODEV; | |
79 | struct of_platform_driver *drv; | |
80 | struct of_device *of_dev; | |
81 | const struct of_device_id *match; | |
82 | ||
83 | drv = to_of_platform_driver(dev->driver); | |
84 | of_dev = to_of_device(dev); | |
85 | ||
86 | if (!drv->probe) | |
87 | return error; | |
88 | ||
89 | of_dev_get(of_dev); | |
90 | ||
91 | match = of_match_device(drv->match_table, of_dev); | |
92 | if (match) | |
93 | error = drv->probe(of_dev, match); | |
94 | if (error) | |
95 | of_dev_put(of_dev); | |
96 | ||
97 | return error; | |
98 | } | |
99 | ||
100 | static int of_device_remove(struct device *dev) | |
101 | { | |
102 | struct of_device * of_dev = to_of_device(dev); | |
103 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
104 | ||
105 | if (dev->driver && drv->remove) | |
106 | drv->remove(of_dev); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static int of_device_suspend(struct device *dev, pm_message_t state) | |
111 | { | |
112 | struct of_device * of_dev = to_of_device(dev); | |
113 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
114 | int error = 0; | |
115 | ||
116 | if (dev->driver && drv->suspend) | |
117 | error = drv->suspend(of_dev, state); | |
118 | return error; | |
119 | } | |
120 | ||
121 | static int of_device_resume(struct device * dev) | |
122 | { | |
123 | struct of_device * of_dev = to_of_device(dev); | |
124 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); | |
125 | int error = 0; | |
126 | ||
127 | if (dev->driver && drv->resume) | |
128 | error = drv->resume(of_dev); | |
129 | return error; | |
130 | } | |
131 | ||
8f96cd1a DM |
132 | static int node_match(struct device *dev, void *data) |
133 | { | |
134 | struct of_device *op = to_of_device(dev); | |
135 | struct device_node *dp = data; | |
136 | ||
137 | return (op->node == dp); | |
138 | } | |
139 | ||
140 | struct of_device *of_find_device_by_node(struct device_node *dp) | |
141 | { | |
142 | struct device *dev = bus_find_device(&of_bus_type, NULL, | |
143 | dp, node_match); | |
144 | ||
145 | if (dev) | |
146 | return to_of_device(dev); | |
147 | ||
148 | return NULL; | |
149 | } | |
150 | EXPORT_SYMBOL(of_find_device_by_node); | |
151 | ||
fd531431 DM |
152 | #ifdef CONFIG_PCI |
153 | struct bus_type ebus_bus_type = { | |
154 | .name = "ebus", | |
155 | .match = of_platform_bus_match, | |
156 | .probe = of_device_probe, | |
157 | .remove = of_device_remove, | |
158 | .suspend = of_device_suspend, | |
159 | .resume = of_device_resume, | |
160 | }; | |
69853918 | 161 | EXPORT_SYMBOL(ebus_bus_type); |
fd531431 DM |
162 | #endif |
163 | ||
164 | #ifdef CONFIG_SBUS | |
165 | struct bus_type sbus_bus_type = { | |
166 | .name = "sbus", | |
167 | .match = of_platform_bus_match, | |
168 | .probe = of_device_probe, | |
169 | .remove = of_device_remove, | |
170 | .suspend = of_device_suspend, | |
171 | .resume = of_device_resume, | |
172 | }; | |
69853918 | 173 | EXPORT_SYMBOL(sbus_bus_type); |
fd531431 DM |
174 | #endif |
175 | ||
cf44bbc2 DM |
176 | struct bus_type of_bus_type = { |
177 | .name = "of", | |
178 | .match = of_platform_bus_match, | |
179 | .probe = of_device_probe, | |
180 | .remove = of_device_remove, | |
181 | .suspend = of_device_suspend, | |
182 | .resume = of_device_resume, | |
183 | }; | |
184 | EXPORT_SYMBOL(of_bus_type); | |
185 | ||
186 | static inline u64 of_read_addr(u32 *cell, int size) | |
187 | { | |
188 | u64 r = 0; | |
189 | while (size--) | |
190 | r = (r << 32) | *(cell++); | |
191 | return r; | |
192 | } | |
193 | ||
194 | static void __init get_cells(struct device_node *dp, | |
195 | int *addrc, int *sizec) | |
196 | { | |
197 | if (addrc) | |
198 | *addrc = of_n_addr_cells(dp); | |
199 | if (sizec) | |
200 | *sizec = of_n_size_cells(dp); | |
201 | } | |
202 | ||
203 | /* Max address size we deal with */ | |
204 | #define OF_MAX_ADDR_CELLS 4 | |
205 | ||
206 | struct of_bus { | |
207 | const char *name; | |
208 | const char *addr_prop_name; | |
209 | int (*match)(struct device_node *parent); | |
210 | void (*count_cells)(struct device_node *child, | |
211 | int *addrc, int *sizec); | |
212 | u64 (*map)(u32 *addr, u32 *range, int na, int ns, int pna); | |
213 | int (*translate)(u32 *addr, u64 offset, int na); | |
214 | unsigned int (*get_flags)(u32 *addr); | |
215 | }; | |
216 | ||
217 | /* | |
218 | * Default translator (generic bus) | |
219 | */ | |
220 | ||
221 | static void of_bus_default_count_cells(struct device_node *dev, | |
222 | int *addrc, int *sizec) | |
223 | { | |
224 | get_cells(dev, addrc, sizec); | |
225 | } | |
226 | ||
227 | static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
228 | { | |
229 | u64 cp, s, da; | |
230 | ||
231 | cp = of_read_addr(range, na); | |
232 | s = of_read_addr(range + na + pna, ns); | |
233 | da = of_read_addr(addr, na); | |
234 | ||
235 | if (da < cp || da >= (cp + s)) | |
236 | return OF_BAD_ADDR; | |
237 | return da - cp; | |
238 | } | |
239 | ||
240 | static int of_bus_default_translate(u32 *addr, u64 offset, int na) | |
241 | { | |
242 | u64 a = of_read_addr(addr, na); | |
243 | memset(addr, 0, na * 4); | |
244 | a += offset; | |
245 | if (na > 1) | |
246 | addr[na - 2] = a >> 32; | |
247 | addr[na - 1] = a & 0xffffffffu; | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | static unsigned int of_bus_default_get_flags(u32 *addr) | |
253 | { | |
254 | return IORESOURCE_MEM; | |
255 | } | |
256 | ||
257 | ||
258 | /* | |
259 | * PCI bus specific translator | |
260 | */ | |
261 | ||
262 | static int of_bus_pci_match(struct device_node *np) | |
263 | { | |
264 | return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex"); | |
265 | } | |
266 | ||
267 | static void of_bus_pci_count_cells(struct device_node *np, | |
268 | int *addrc, int *sizec) | |
269 | { | |
270 | if (addrc) | |
271 | *addrc = 3; | |
272 | if (sizec) | |
273 | *sizec = 2; | |
274 | } | |
275 | ||
276 | static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
277 | { | |
278 | u64 cp, s, da; | |
279 | ||
280 | /* Check address type match */ | |
281 | if ((addr[0] ^ range[0]) & 0x03000000) | |
282 | return OF_BAD_ADDR; | |
283 | ||
284 | /* Read address values, skipping high cell */ | |
285 | cp = of_read_addr(range + 1, na - 1); | |
286 | s = of_read_addr(range + na + pna, ns); | |
287 | da = of_read_addr(addr + 1, na - 1); | |
288 | ||
289 | if (da < cp || da >= (cp + s)) | |
290 | return OF_BAD_ADDR; | |
291 | return da - cp; | |
292 | } | |
293 | ||
294 | static int of_bus_pci_translate(u32 *addr, u64 offset, int na) | |
295 | { | |
296 | return of_bus_default_translate(addr + 1, offset, na - 1); | |
297 | } | |
298 | ||
299 | static unsigned int of_bus_pci_get_flags(u32 *addr) | |
300 | { | |
301 | unsigned int flags = 0; | |
302 | u32 w = addr[0]; | |
303 | ||
304 | switch((w >> 24) & 0x03) { | |
305 | case 0x01: | |
306 | flags |= IORESOURCE_IO; | |
307 | case 0x02: /* 32 bits */ | |
308 | case 0x03: /* 64 bits */ | |
309 | flags |= IORESOURCE_MEM; | |
310 | } | |
311 | if (w & 0x40000000) | |
312 | flags |= IORESOURCE_PREFETCH; | |
313 | return flags; | |
314 | } | |
315 | ||
316 | /* | |
317 | * SBUS bus specific translator | |
318 | */ | |
319 | ||
320 | static int of_bus_sbus_match(struct device_node *np) | |
321 | { | |
322 | return !strcmp(np->name, "sbus") || | |
323 | !strcmp(np->name, "sbi"); | |
324 | } | |
325 | ||
326 | static void of_bus_sbus_count_cells(struct device_node *child, | |
327 | int *addrc, int *sizec) | |
328 | { | |
329 | if (addrc) | |
330 | *addrc = 2; | |
331 | if (sizec) | |
332 | *sizec = 1; | |
333 | } | |
334 | ||
335 | static u64 of_bus_sbus_map(u32 *addr, u32 *range, int na, int ns, int pna) | |
336 | { | |
337 | return of_bus_default_map(addr, range, na, ns, pna); | |
338 | } | |
339 | ||
340 | static int of_bus_sbus_translate(u32 *addr, u64 offset, int na) | |
341 | { | |
342 | return of_bus_default_translate(addr, offset, na); | |
343 | } | |
344 | ||
345 | static unsigned int of_bus_sbus_get_flags(u32 *addr) | |
346 | { | |
347 | return IORESOURCE_MEM; | |
348 | } | |
349 | ||
350 | ||
351 | /* | |
352 | * Array of bus specific translators | |
353 | */ | |
354 | ||
355 | static struct of_bus of_busses[] = { | |
356 | /* PCI */ | |
357 | { | |
358 | .name = "pci", | |
359 | .addr_prop_name = "assigned-addresses", | |
360 | .match = of_bus_pci_match, | |
361 | .count_cells = of_bus_pci_count_cells, | |
362 | .map = of_bus_pci_map, | |
363 | .translate = of_bus_pci_translate, | |
364 | .get_flags = of_bus_pci_get_flags, | |
365 | }, | |
366 | /* SBUS */ | |
367 | { | |
368 | .name = "sbus", | |
369 | .addr_prop_name = "reg", | |
370 | .match = of_bus_sbus_match, | |
371 | .count_cells = of_bus_sbus_count_cells, | |
372 | .map = of_bus_sbus_map, | |
373 | .translate = of_bus_sbus_translate, | |
374 | .get_flags = of_bus_sbus_get_flags, | |
375 | }, | |
376 | /* Default */ | |
377 | { | |
378 | .name = "default", | |
379 | .addr_prop_name = "reg", | |
380 | .match = NULL, | |
381 | .count_cells = of_bus_default_count_cells, | |
382 | .map = of_bus_default_map, | |
383 | .translate = of_bus_default_translate, | |
384 | .get_flags = of_bus_default_get_flags, | |
385 | }, | |
386 | }; | |
387 | ||
388 | static struct of_bus *of_match_bus(struct device_node *np) | |
389 | { | |
390 | int i; | |
391 | ||
392 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) | |
393 | if (!of_busses[i].match || of_busses[i].match(np)) | |
394 | return &of_busses[i]; | |
395 | BUG(); | |
396 | return NULL; | |
397 | } | |
398 | ||
399 | static int __init build_one_resource(struct device_node *parent, | |
400 | struct of_bus *bus, | |
401 | struct of_bus *pbus, | |
402 | u32 *addr, | |
403 | int na, int ns, int pna) | |
404 | { | |
405 | u32 *ranges; | |
406 | unsigned int rlen; | |
407 | int rone; | |
408 | u64 offset = OF_BAD_ADDR; | |
409 | ||
410 | ranges = of_get_property(parent, "ranges", &rlen); | |
411 | if (ranges == NULL || rlen == 0) { | |
412 | offset = of_read_addr(addr, na); | |
413 | memset(addr, 0, pna * 4); | |
414 | goto finish; | |
415 | } | |
416 | ||
417 | /* Now walk through the ranges */ | |
418 | rlen /= 4; | |
419 | rone = na + pna + ns; | |
420 | for (; rlen >= rone; rlen -= rone, ranges += rone) { | |
421 | offset = bus->map(addr, ranges, na, ns, pna); | |
422 | if (offset != OF_BAD_ADDR) | |
423 | break; | |
424 | } | |
425 | if (offset == OF_BAD_ADDR) | |
426 | return 1; | |
427 | ||
428 | memcpy(addr, ranges + na, 4 * pna); | |
429 | ||
430 | finish: | |
431 | /* Translate it into parent bus space */ | |
432 | return pbus->translate(addr, offset, pna); | |
433 | } | |
434 | ||
435 | static void __init build_device_resources(struct of_device *op, | |
436 | struct device *parent) | |
437 | { | |
438 | struct of_device *p_op; | |
439 | struct of_bus *bus; | |
440 | int na, ns; | |
441 | int index, num_reg; | |
442 | void *preg; | |
443 | ||
444 | if (!parent) | |
445 | return; | |
446 | ||
447 | p_op = to_of_device(parent); | |
448 | bus = of_match_bus(p_op->node); | |
449 | bus->count_cells(op->node, &na, &ns); | |
450 | ||
451 | preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); | |
452 | if (!preg || num_reg == 0) | |
453 | return; | |
454 | ||
455 | /* Convert to num-cells. */ | |
456 | num_reg /= 4; | |
457 | ||
458 | /* Conver to num-entries. */ | |
459 | num_reg /= na + ns; | |
460 | ||
461 | for (index = 0; index < num_reg; index++) { | |
462 | struct resource *r = &op->resource[index]; | |
463 | u32 addr[OF_MAX_ADDR_CELLS]; | |
464 | u32 *reg = (preg + (index * ((na + ns) * 4))); | |
465 | struct device_node *dp = op->node; | |
466 | struct device_node *pp = p_op->node; | |
467 | struct of_bus *pbus; | |
468 | u64 size, result = OF_BAD_ADDR; | |
469 | unsigned long flags; | |
470 | int dna, dns; | |
471 | int pna, pns; | |
472 | ||
473 | size = of_read_addr(reg + na, ns); | |
474 | flags = bus->get_flags(reg); | |
475 | ||
476 | memcpy(addr, reg, na * 4); | |
477 | ||
478 | /* If the immediate parent has no ranges property to apply, | |
479 | * just use a 1<->1 mapping. | |
480 | */ | |
481 | if (of_find_property(pp, "ranges", NULL) == NULL) { | |
482 | result = of_read_addr(addr, na); | |
483 | goto build_res; | |
484 | } | |
485 | ||
486 | dna = na; | |
487 | dns = ns; | |
488 | ||
489 | while (1) { | |
490 | dp = pp; | |
491 | pp = dp->parent; | |
492 | if (!pp) { | |
493 | result = of_read_addr(addr, dna); | |
494 | break; | |
495 | } | |
496 | ||
497 | pbus = of_match_bus(pp); | |
498 | pbus->count_cells(dp, &pna, &pns); | |
499 | ||
500 | if (build_one_resource(dp, bus, pbus, addr, dna, dns, pna)) | |
501 | break; | |
502 | ||
503 | dna = pna; | |
504 | dns = pns; | |
505 | bus = pbus; | |
506 | } | |
507 | ||
508 | build_res: | |
509 | memset(r, 0, sizeof(*r)); | |
510 | if (result != OF_BAD_ADDR) { | |
95714e12 | 511 | r->start = result & 0xffffffff; |
cf44bbc2 | 512 | r->end = result + size - 1; |
95714e12 | 513 | r->flags = flags | ((result >> 32ULL) & 0xffUL); |
cf44bbc2 DM |
514 | } else { |
515 | r->start = ~0UL; | |
516 | r->end = ~0UL; | |
517 | } | |
518 | r->name = op->node->name; | |
519 | } | |
520 | } | |
521 | ||
522 | static struct of_device * __init scan_one_device(struct device_node *dp, | |
523 | struct device *parent) | |
524 | { | |
525 | struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); | |
8f96cd1a DM |
526 | struct linux_prom_irqs *intr; |
527 | int len, i; | |
cf44bbc2 DM |
528 | |
529 | if (!op) | |
530 | return NULL; | |
531 | ||
532 | op->node = dp; | |
533 | ||
534 | op->clock_freq = of_getintprop_default(dp, "clock-frequency", | |
535 | (25*1000*1000)); | |
536 | op->portid = of_getintprop_default(dp, "upa-portid", -1); | |
537 | if (op->portid == -1) | |
538 | op->portid = of_getintprop_default(dp, "portid", -1); | |
539 | ||
8f96cd1a DM |
540 | intr = of_get_property(dp, "intr", &len); |
541 | if (intr) { | |
542 | op->num_irqs = len / sizeof(struct linux_prom_irqs); | |
543 | for (i = 0; i < op->num_irqs; i++) | |
544 | op->irqs[i] = intr[i].pri; | |
545 | } else { | |
546 | unsigned int *irq = of_get_property(dp, "interrupts", &len); | |
547 | ||
548 | if (irq) { | |
549 | op->num_irqs = len / sizeof(unsigned int); | |
550 | for (i = 0; i < op->num_irqs; i++) | |
551 | op->irqs[i] = irq[i]; | |
552 | } else { | |
553 | op->num_irqs = 0; | |
554 | } | |
555 | } | |
556 | if (sparc_cpu_model == sun4d) { | |
557 | static int pil_to_sbus[] = { | |
558 | 0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0, | |
559 | }; | |
560 | struct device_node *busp = dp->parent; | |
561 | struct linux_prom_registers *regs; | |
562 | int board = of_getintprop_default(busp, "board#", 0); | |
563 | int slot; | |
564 | ||
565 | regs = of_get_property(dp, "reg", NULL); | |
566 | slot = regs->which_io; | |
567 | ||
568 | for (i = 0; i < op->num_irqs; i++) { | |
569 | int this_irq = op->irqs[i]; | |
570 | int sbusl = pil_to_sbus[this_irq]; | |
571 | ||
572 | if (sbusl) | |
573 | this_irq = (((board + 1) << 5) + | |
574 | (sbusl << 2) + | |
575 | slot); | |
576 | ||
577 | op->irqs[i] = this_irq; | |
578 | } | |
579 | } | |
cf44bbc2 DM |
580 | |
581 | build_device_resources(op, parent); | |
582 | ||
583 | op->dev.parent = parent; | |
584 | op->dev.bus = &of_bus_type; | |
585 | if (!parent) | |
586 | strcpy(op->dev.bus_id, "root"); | |
587 | else | |
588 | strcpy(op->dev.bus_id, dp->path_component_name); | |
589 | ||
590 | if (of_device_register(op)) { | |
591 | printk("%s: Could not register of device.\n", | |
592 | dp->full_name); | |
593 | kfree(op); | |
594 | op = NULL; | |
595 | } | |
596 | ||
597 | return op; | |
598 | } | |
599 | ||
600 | static void __init scan_tree(struct device_node *dp, struct device *parent) | |
601 | { | |
602 | while (dp) { | |
603 | struct of_device *op = scan_one_device(dp, parent); | |
604 | ||
605 | if (op) | |
606 | scan_tree(dp->child, &op->dev); | |
607 | ||
608 | dp = dp->sibling; | |
609 | } | |
610 | } | |
611 | ||
612 | static void __init scan_of_devices(void) | |
613 | { | |
614 | struct device_node *root = of_find_node_by_path("/"); | |
615 | struct of_device *parent; | |
616 | ||
617 | parent = scan_one_device(root, NULL); | |
618 | if (!parent) | |
619 | return; | |
620 | ||
621 | scan_tree(root->child, &parent->dev); | |
622 | } | |
623 | ||
fd531431 DM |
624 | static int __init of_bus_driver_init(void) |
625 | { | |
cf44bbc2 | 626 | int err; |
fd531431 | 627 | |
cf44bbc2 | 628 | err = bus_register(&of_bus_type); |
fd531431 DM |
629 | #ifdef CONFIG_PCI |
630 | if (!err) | |
631 | err = bus_register(&ebus_bus_type); | |
632 | #endif | |
633 | #ifdef CONFIG_SBUS | |
634 | if (!err) | |
635 | err = bus_register(&sbus_bus_type); | |
636 | #endif | |
cf44bbc2 DM |
637 | |
638 | if (!err) | |
639 | scan_of_devices(); | |
640 | ||
641 | return err; | |
fd531431 DM |
642 | } |
643 | ||
644 | postcore_initcall(of_bus_driver_init); | |
645 | ||
646 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) | |
647 | { | |
648 | /* initialize common driver fields */ | |
649 | drv->driver.name = drv->name; | |
650 | drv->driver.bus = bus; | |
651 | ||
652 | /* register with core */ | |
653 | return driver_register(&drv->driver); | |
654 | } | |
655 | ||
656 | void of_unregister_driver(struct of_platform_driver *drv) | |
657 | { | |
658 | driver_unregister(&drv->driver); | |
659 | } | |
660 | ||
661 | ||
662 | static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf) | |
663 | { | |
664 | struct of_device *ofdev; | |
665 | ||
666 | ofdev = to_of_device(dev); | |
667 | return sprintf(buf, "%s", ofdev->node->full_name); | |
668 | } | |
669 | ||
670 | static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL); | |
671 | ||
672 | /** | |
673 | * of_release_dev - free an of device structure when all users of it are finished. | |
674 | * @dev: device that's been disconnected | |
675 | * | |
676 | * Will be called only by the device core when all users of this of device are | |
677 | * done. | |
678 | */ | |
679 | void of_release_dev(struct device *dev) | |
680 | { | |
681 | struct of_device *ofdev; | |
682 | ||
683 | ofdev = to_of_device(dev); | |
684 | ||
685 | kfree(ofdev); | |
686 | } | |
687 | ||
688 | int of_device_register(struct of_device *ofdev) | |
689 | { | |
690 | int rc; | |
691 | ||
692 | BUG_ON(ofdev->node == NULL); | |
693 | ||
694 | rc = device_register(&ofdev->dev); | |
695 | if (rc) | |
696 | return rc; | |
697 | ||
6cc8b6f5 AM |
698 | rc = device_create_file(&ofdev->dev, &dev_attr_devspec); |
699 | if (rc) | |
700 | device_unregister(&ofdev->dev); | |
fd531431 | 701 | |
6cc8b6f5 | 702 | return rc; |
fd531431 DM |
703 | } |
704 | ||
705 | void of_device_unregister(struct of_device *ofdev) | |
706 | { | |
707 | device_remove_file(&ofdev->dev, &dev_attr_devspec); | |
708 | device_unregister(&ofdev->dev); | |
709 | } | |
710 | ||
711 | struct of_device* of_platform_device_create(struct device_node *np, | |
712 | const char *bus_id, | |
713 | struct device *parent, | |
714 | struct bus_type *bus) | |
715 | { | |
716 | struct of_device *dev; | |
717 | ||
718 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); | |
719 | if (!dev) | |
720 | return NULL; | |
721 | memset(dev, 0, sizeof(*dev)); | |
722 | ||
723 | dev->dev.parent = parent; | |
724 | dev->dev.bus = bus; | |
725 | dev->dev.release = of_release_dev; | |
726 | ||
727 | strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE); | |
728 | ||
729 | if (of_device_register(dev) != 0) { | |
730 | kfree(dev); | |
731 | return NULL; | |
732 | } | |
733 | ||
734 | return dev; | |
735 | } | |
736 | ||
737 | EXPORT_SYMBOL(of_match_device); | |
738 | EXPORT_SYMBOL(of_register_driver); | |
739 | EXPORT_SYMBOL(of_unregister_driver); | |
740 | EXPORT_SYMBOL(of_device_register); | |
741 | EXPORT_SYMBOL(of_device_unregister); | |
742 | EXPORT_SYMBOL(of_dev_get); | |
743 | EXPORT_SYMBOL(of_dev_put); | |
744 | EXPORT_SYMBOL(of_platform_device_create); | |
745 | EXPORT_SYMBOL(of_release_dev); |