Commit | Line | Data |
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fd531431 DM |
1 | #include <linux/string.h> |
2 | #include <linux/kernel.h> | |
f85ff305 | 3 | #include <linux/of.h> |
fd531431 DM |
4 | #include <linux/init.h> |
5 | #include <linux/module.h> | |
6 | #include <linux/mod_devicetable.h> | |
7 | #include <linux/slab.h> | |
3f23de10 SR |
8 | #include <linux/errno.h> |
9 | #include <linux/of_device.h> | |
10 | #include <linux/of_platform.h> | |
fd531431 | 11 | |
8f96cd1a DM |
12 | static int node_match(struct device *dev, void *data) |
13 | { | |
14 | struct of_device *op = to_of_device(dev); | |
15 | struct device_node *dp = data; | |
16 | ||
17 | return (op->node == dp); | |
18 | } | |
19 | ||
20 | struct of_device *of_find_device_by_node(struct device_node *dp) | |
21 | { | |
37b7754a | 22 | struct device *dev = bus_find_device(&of_platform_bus_type, NULL, |
8f96cd1a DM |
23 | dp, node_match); |
24 | ||
25 | if (dev) | |
26 | return to_of_device(dev); | |
27 | ||
28 | return NULL; | |
29 | } | |
30 | EXPORT_SYMBOL(of_find_device_by_node); | |
31 | ||
51e0f004 | 32 | unsigned int irq_of_parse_and_map(struct device_node *node, int index) |
44266215 DM |
33 | { |
34 | struct of_device *op = of_find_device_by_node(node); | |
35 | ||
36 | if (!op || index >= op->num_irqs) | |
51e0f004 | 37 | return 0; |
44266215 DM |
38 | |
39 | return op->irqs[index]; | |
40 | } | |
41 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
42 | ||
5059625e DM |
43 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in |
44 | * BUS and propagate to all child of_device objects. | |
45 | */ | |
46 | void of_propagate_archdata(struct of_device *bus) | |
47 | { | |
48 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
49 | struct device_node *bus_dp = bus->node; | |
50 | struct device_node *dp; | |
51 | ||
52 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
53 | struct of_device *op = of_find_device_by_node(dp); | |
54 | ||
55 | op->dev.archdata.iommu = bus_sd->iommu; | |
56 | op->dev.archdata.stc = bus_sd->stc; | |
57 | op->dev.archdata.host_controller = bus_sd->host_controller; | |
58 | op->dev.archdata.numa_node = bus_sd->numa_node; | |
59 | ||
60 | if (dp->child) | |
61 | of_propagate_archdata(op); | |
62 | } | |
63 | } | |
64 | ||
3f23de10 | 65 | struct bus_type of_platform_bus_type; |
37b7754a | 66 | EXPORT_SYMBOL(of_platform_bus_type); |
cf44bbc2 | 67 | |
a83f9823 | 68 | static inline u64 of_read_addr(const u32 *cell, int size) |
cf44bbc2 DM |
69 | { |
70 | u64 r = 0; | |
71 | while (size--) | |
72 | r = (r << 32) | *(cell++); | |
73 | return r; | |
74 | } | |
75 | ||
76 | static void __init get_cells(struct device_node *dp, | |
77 | int *addrc, int *sizec) | |
78 | { | |
79 | if (addrc) | |
80 | *addrc = of_n_addr_cells(dp); | |
81 | if (sizec) | |
82 | *sizec = of_n_size_cells(dp); | |
83 | } | |
84 | ||
85 | /* Max address size we deal with */ | |
86 | #define OF_MAX_ADDR_CELLS 4 | |
87 | ||
88 | struct of_bus { | |
89 | const char *name; | |
90 | const char *addr_prop_name; | |
91 | int (*match)(struct device_node *parent); | |
92 | void (*count_cells)(struct device_node *child, | |
93 | int *addrc, int *sizec); | |
a83f9823 DM |
94 | int (*map)(u32 *addr, const u32 *range, |
95 | int na, int ns, int pna); | |
e3c71a32 | 96 | unsigned long (*get_flags)(const u32 *addr, unsigned long); |
cf44bbc2 DM |
97 | }; |
98 | ||
99 | /* | |
100 | * Default translator (generic bus) | |
101 | */ | |
102 | ||
103 | static void of_bus_default_count_cells(struct device_node *dev, | |
104 | int *addrc, int *sizec) | |
105 | { | |
106 | get_cells(dev, addrc, sizec); | |
107 | } | |
108 | ||
a83f9823 DM |
109 | /* Make sure the least significant 64-bits are in-range. Even |
110 | * for 3 or 4 cell values it is a good enough approximation. | |
111 | */ | |
112 | static int of_out_of_range(const u32 *addr, const u32 *base, | |
113 | const u32 *size, int na, int ns) | |
cf44bbc2 | 114 | { |
a83f9823 DM |
115 | u64 a = of_read_addr(addr, na); |
116 | u64 b = of_read_addr(base, na); | |
117 | ||
118 | if (a < b) | |
119 | return 1; | |
cf44bbc2 | 120 | |
a83f9823 DM |
121 | b += of_read_addr(size, ns); |
122 | if (a >= b) | |
123 | return 1; | |
cf44bbc2 | 124 | |
a83f9823 | 125 | return 0; |
cf44bbc2 DM |
126 | } |
127 | ||
a83f9823 DM |
128 | static int of_bus_default_map(u32 *addr, const u32 *range, |
129 | int na, int ns, int pna) | |
cf44bbc2 | 130 | { |
a83f9823 DM |
131 | u32 result[OF_MAX_ADDR_CELLS]; |
132 | int i; | |
133 | ||
134 | if (ns > 2) { | |
135 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) | |
140 | return -EINVAL; | |
141 | ||
142 | /* Start with the parent range base. */ | |
143 | memcpy(result, range + na, pna * 4); | |
144 | ||
145 | /* Add in the child address offset. */ | |
146 | for (i = 0; i < na; i++) | |
147 | result[pna - 1 - i] += | |
148 | (addr[na - 1 - i] - | |
149 | range[na - 1 - i]); | |
150 | ||
151 | memcpy(addr, result, pna * 4); | |
cf44bbc2 DM |
152 | |
153 | return 0; | |
154 | } | |
155 | ||
e3c71a32 | 156 | static unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags) |
cf44bbc2 | 157 | { |
e3c71a32 DM |
158 | if (flags) |
159 | return flags; | |
cf44bbc2 DM |
160 | return IORESOURCE_MEM; |
161 | } | |
162 | ||
cf44bbc2 DM |
163 | /* |
164 | * PCI bus specific translator | |
165 | */ | |
166 | ||
167 | static int of_bus_pci_match(struct device_node *np) | |
168 | { | |
a83f9823 DM |
169 | if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) { |
170 | /* Do not do PCI specific frobbing if the | |
171 | * PCI bridge lacks a ranges property. We | |
172 | * want to pass it through up to the next | |
173 | * parent as-is, not with the PCI translate | |
174 | * method which chops off the top address cell. | |
175 | */ | |
176 | if (!of_find_property(np, "ranges", NULL)) | |
177 | return 0; | |
178 | ||
179 | return 1; | |
180 | } | |
181 | ||
182 | return 0; | |
cf44bbc2 DM |
183 | } |
184 | ||
185 | static void of_bus_pci_count_cells(struct device_node *np, | |
186 | int *addrc, int *sizec) | |
187 | { | |
188 | if (addrc) | |
189 | *addrc = 3; | |
190 | if (sizec) | |
191 | *sizec = 2; | |
192 | } | |
193 | ||
a83f9823 DM |
194 | static int of_bus_pci_map(u32 *addr, const u32 *range, |
195 | int na, int ns, int pna) | |
cf44bbc2 | 196 | { |
a83f9823 DM |
197 | u32 result[OF_MAX_ADDR_CELLS]; |
198 | int i; | |
cf44bbc2 DM |
199 | |
200 | /* Check address type match */ | |
201 | if ((addr[0] ^ range[0]) & 0x03000000) | |
a83f9823 | 202 | return -EINVAL; |
cf44bbc2 | 203 | |
a83f9823 DM |
204 | if (of_out_of_range(addr + 1, range + 1, range + na + pna, |
205 | na - 1, ns)) | |
206 | return -EINVAL; | |
cf44bbc2 | 207 | |
a83f9823 DM |
208 | /* Start with the parent range base. */ |
209 | memcpy(result, range + na, pna * 4); | |
cf44bbc2 | 210 | |
a83f9823 DM |
211 | /* Add in the child address offset, skipping high cell. */ |
212 | for (i = 0; i < na - 1; i++) | |
213 | result[pna - 1 - i] += | |
214 | (addr[na - 1 - i] - | |
215 | range[na - 1 - i]); | |
216 | ||
217 | memcpy(addr, result, pna * 4); | |
218 | ||
219 | return 0; | |
cf44bbc2 DM |
220 | } |
221 | ||
e3c71a32 | 222 | static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags) |
cf44bbc2 | 223 | { |
cf44bbc2 DM |
224 | u32 w = addr[0]; |
225 | ||
e3c71a32 DM |
226 | /* For PCI, we override whatever child busses may have used. */ |
227 | flags = 0; | |
cf44bbc2 DM |
228 | switch((w >> 24) & 0x03) { |
229 | case 0x01: | |
230 | flags |= IORESOURCE_IO; | |
e3c71a32 DM |
231 | break; |
232 | ||
cf44bbc2 DM |
233 | case 0x02: /* 32 bits */ |
234 | case 0x03: /* 64 bits */ | |
235 | flags |= IORESOURCE_MEM; | |
e3c71a32 | 236 | break; |
cf44bbc2 DM |
237 | } |
238 | if (w & 0x40000000) | |
239 | flags |= IORESOURCE_PREFETCH; | |
240 | return flags; | |
241 | } | |
242 | ||
243 | /* | |
244 | * SBUS bus specific translator | |
245 | */ | |
246 | ||
247 | static int of_bus_sbus_match(struct device_node *np) | |
248 | { | |
249 | return !strcmp(np->name, "sbus") || | |
250 | !strcmp(np->name, "sbi"); | |
251 | } | |
252 | ||
253 | static void of_bus_sbus_count_cells(struct device_node *child, | |
254 | int *addrc, int *sizec) | |
255 | { | |
256 | if (addrc) | |
257 | *addrc = 2; | |
258 | if (sizec) | |
259 | *sizec = 1; | |
260 | } | |
261 | ||
a83f9823 | 262 | static int of_bus_sbus_map(u32 *addr, const u32 *range, int na, int ns, int pna) |
cf44bbc2 DM |
263 | { |
264 | return of_bus_default_map(addr, range, na, ns, pna); | |
265 | } | |
266 | ||
bdba4d6b | 267 | static unsigned long of_bus_sbus_get_flags(const u32 *addr, unsigned long flags) |
cf44bbc2 DM |
268 | { |
269 | return IORESOURCE_MEM; | |
270 | } | |
271 | ||
272 | ||
273 | /* | |
274 | * Array of bus specific translators | |
275 | */ | |
276 | ||
277 | static struct of_bus of_busses[] = { | |
278 | /* PCI */ | |
279 | { | |
280 | .name = "pci", | |
281 | .addr_prop_name = "assigned-addresses", | |
282 | .match = of_bus_pci_match, | |
283 | .count_cells = of_bus_pci_count_cells, | |
284 | .map = of_bus_pci_map, | |
cf44bbc2 DM |
285 | .get_flags = of_bus_pci_get_flags, |
286 | }, | |
287 | /* SBUS */ | |
288 | { | |
289 | .name = "sbus", | |
290 | .addr_prop_name = "reg", | |
291 | .match = of_bus_sbus_match, | |
292 | .count_cells = of_bus_sbus_count_cells, | |
293 | .map = of_bus_sbus_map, | |
cf44bbc2 DM |
294 | .get_flags = of_bus_sbus_get_flags, |
295 | }, | |
296 | /* Default */ | |
297 | { | |
298 | .name = "default", | |
299 | .addr_prop_name = "reg", | |
300 | .match = NULL, | |
301 | .count_cells = of_bus_default_count_cells, | |
302 | .map = of_bus_default_map, | |
cf44bbc2 DM |
303 | .get_flags = of_bus_default_get_flags, |
304 | }, | |
305 | }; | |
306 | ||
307 | static struct of_bus *of_match_bus(struct device_node *np) | |
308 | { | |
309 | int i; | |
310 | ||
311 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) | |
312 | if (!of_busses[i].match || of_busses[i].match(np)) | |
313 | return &of_busses[i]; | |
314 | BUG(); | |
315 | return NULL; | |
316 | } | |
317 | ||
318 | static int __init build_one_resource(struct device_node *parent, | |
319 | struct of_bus *bus, | |
320 | struct of_bus *pbus, | |
321 | u32 *addr, | |
322 | int na, int ns, int pna) | |
323 | { | |
8271f042 | 324 | const u32 *ranges; |
cf44bbc2 DM |
325 | unsigned int rlen; |
326 | int rone; | |
cf44bbc2 DM |
327 | |
328 | ranges = of_get_property(parent, "ranges", &rlen); | |
329 | if (ranges == NULL || rlen == 0) { | |
a83f9823 DM |
330 | u32 result[OF_MAX_ADDR_CELLS]; |
331 | int i; | |
332 | ||
333 | memset(result, 0, pna * 4); | |
334 | for (i = 0; i < na; i++) | |
335 | result[pna - 1 - i] = | |
336 | addr[na - 1 - i]; | |
337 | ||
338 | memcpy(addr, result, pna * 4); | |
339 | return 0; | |
cf44bbc2 DM |
340 | } |
341 | ||
342 | /* Now walk through the ranges */ | |
343 | rlen /= 4; | |
344 | rone = na + pna + ns; | |
345 | for (; rlen >= rone; rlen -= rone, ranges += rone) { | |
a83f9823 DM |
346 | if (!bus->map(addr, ranges, na, ns, pna)) |
347 | return 0; | |
cf44bbc2 | 348 | } |
cf44bbc2 | 349 | |
a83f9823 | 350 | return 1; |
cf44bbc2 DM |
351 | } |
352 | ||
5280267c DM |
353 | static int __init use_1to1_mapping(struct device_node *pp) |
354 | { | |
355 | /* If we have a ranges property in the parent, use it. */ | |
356 | if (of_find_property(pp, "ranges", NULL) != NULL) | |
357 | return 0; | |
358 | ||
359 | /* Some SBUS devices use intermediate nodes to express | |
360 | * hierarchy within the device itself. These aren't | |
361 | * real bus nodes, and don't have a 'ranges' property. | |
362 | * But, we should still pass the translation work up | |
363 | * to the SBUS itself. | |
364 | */ | |
365 | if (!strcmp(pp->name, "dma") || | |
366 | !strcmp(pp->name, "espdma") || | |
367 | !strcmp(pp->name, "ledma") || | |
368 | !strcmp(pp->name, "lebuffer")) | |
369 | return 0; | |
370 | ||
371 | return 1; | |
372 | } | |
373 | ||
a83f9823 DM |
374 | static int of_resource_verbose; |
375 | ||
cf44bbc2 DM |
376 | static void __init build_device_resources(struct of_device *op, |
377 | struct device *parent) | |
378 | { | |
379 | struct of_device *p_op; | |
380 | struct of_bus *bus; | |
381 | int na, ns; | |
382 | int index, num_reg; | |
8271f042 | 383 | const void *preg; |
cf44bbc2 DM |
384 | |
385 | if (!parent) | |
386 | return; | |
387 | ||
388 | p_op = to_of_device(parent); | |
389 | bus = of_match_bus(p_op->node); | |
390 | bus->count_cells(op->node, &na, &ns); | |
391 | ||
392 | preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); | |
393 | if (!preg || num_reg == 0) | |
394 | return; | |
395 | ||
396 | /* Convert to num-cells. */ | |
397 | num_reg /= 4; | |
398 | ||
399 | /* Conver to num-entries. */ | |
400 | num_reg /= na + ns; | |
401 | ||
402 | for (index = 0; index < num_reg; index++) { | |
403 | struct resource *r = &op->resource[index]; | |
404 | u32 addr[OF_MAX_ADDR_CELLS]; | |
8271f042 | 405 | const u32 *reg = (preg + (index * ((na + ns) * 4))); |
cf44bbc2 DM |
406 | struct device_node *dp = op->node; |
407 | struct device_node *pp = p_op->node; | |
b85cdd49 | 408 | struct of_bus *pbus, *dbus; |
cf44bbc2 DM |
409 | u64 size, result = OF_BAD_ADDR; |
410 | unsigned long flags; | |
411 | int dna, dns; | |
412 | int pna, pns; | |
413 | ||
414 | size = of_read_addr(reg + na, ns); | |
cf44bbc2 DM |
415 | |
416 | memcpy(addr, reg, na * 4); | |
417 | ||
e3c71a32 DM |
418 | flags = bus->get_flags(reg, 0); |
419 | ||
5280267c | 420 | if (use_1to1_mapping(pp)) { |
cf44bbc2 DM |
421 | result = of_read_addr(addr, na); |
422 | goto build_res; | |
423 | } | |
424 | ||
425 | dna = na; | |
426 | dns = ns; | |
b85cdd49 | 427 | dbus = bus; |
cf44bbc2 DM |
428 | |
429 | while (1) { | |
430 | dp = pp; | |
431 | pp = dp->parent; | |
432 | if (!pp) { | |
433 | result = of_read_addr(addr, dna); | |
434 | break; | |
435 | } | |
436 | ||
437 | pbus = of_match_bus(pp); | |
438 | pbus->count_cells(dp, &pna, &pns); | |
439 | ||
b85cdd49 | 440 | if (build_one_resource(dp, dbus, pbus, addr, |
a83f9823 | 441 | dna, dns, pna)) |
cf44bbc2 DM |
442 | break; |
443 | ||
e3c71a32 DM |
444 | flags = pbus->get_flags(addr, flags); |
445 | ||
cf44bbc2 DM |
446 | dna = pna; |
447 | dns = pns; | |
b85cdd49 | 448 | dbus = pbus; |
cf44bbc2 DM |
449 | } |
450 | ||
451 | build_res: | |
452 | memset(r, 0, sizeof(*r)); | |
a83f9823 DM |
453 | |
454 | if (of_resource_verbose) | |
455 | printk("%s reg[%d] -> %llx\n", | |
456 | op->node->full_name, index, | |
457 | result); | |
458 | ||
cf44bbc2 | 459 | if (result != OF_BAD_ADDR) { |
95714e12 | 460 | r->start = result & 0xffffffff; |
cf44bbc2 | 461 | r->end = result + size - 1; |
95714e12 | 462 | r->flags = flags | ((result >> 32ULL) & 0xffUL); |
cf44bbc2 DM |
463 | } |
464 | r->name = op->node->name; | |
465 | } | |
466 | } | |
467 | ||
468 | static struct of_device * __init scan_one_device(struct device_node *dp, | |
469 | struct device *parent) | |
470 | { | |
471 | struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); | |
8271f042 | 472 | const struct linux_prom_irqs *intr; |
3d6e4702 | 473 | struct dev_archdata *sd; |
8f96cd1a | 474 | int len, i; |
cf44bbc2 DM |
475 | |
476 | if (!op) | |
477 | return NULL; | |
478 | ||
3d6e4702 DM |
479 | sd = &op->dev.archdata; |
480 | sd->prom_node = dp; | |
481 | sd->op = op; | |
482 | ||
cf44bbc2 DM |
483 | op->node = dp; |
484 | ||
485 | op->clock_freq = of_getintprop_default(dp, "clock-frequency", | |
486 | (25*1000*1000)); | |
487 | op->portid = of_getintprop_default(dp, "upa-portid", -1); | |
488 | if (op->portid == -1) | |
489 | op->portid = of_getintprop_default(dp, "portid", -1); | |
490 | ||
8f96cd1a DM |
491 | intr = of_get_property(dp, "intr", &len); |
492 | if (intr) { | |
493 | op->num_irqs = len / sizeof(struct linux_prom_irqs); | |
494 | for (i = 0; i < op->num_irqs; i++) | |
495 | op->irqs[i] = intr[i].pri; | |
496 | } else { | |
8271f042 SR |
497 | const unsigned int *irq = |
498 | of_get_property(dp, "interrupts", &len); | |
8f96cd1a DM |
499 | |
500 | if (irq) { | |
501 | op->num_irqs = len / sizeof(unsigned int); | |
502 | for (i = 0; i < op->num_irqs; i++) | |
503 | op->irqs[i] = irq[i]; | |
504 | } else { | |
505 | op->num_irqs = 0; | |
506 | } | |
507 | } | |
508 | if (sparc_cpu_model == sun4d) { | |
509 | static int pil_to_sbus[] = { | |
510 | 0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0, | |
511 | }; | |
9d7ab1f4 | 512 | struct device_node *io_unit, *sbi = dp->parent; |
8271f042 | 513 | const struct linux_prom_registers *regs; |
9d7ab1f4 DM |
514 | int board, slot; |
515 | ||
516 | while (sbi) { | |
517 | if (!strcmp(sbi->name, "sbi")) | |
518 | break; | |
519 | ||
520 | sbi = sbi->parent; | |
521 | } | |
522 | if (!sbi) | |
523 | goto build_resources; | |
8f96cd1a DM |
524 | |
525 | regs = of_get_property(dp, "reg", NULL); | |
9d7ab1f4 DM |
526 | if (!regs) |
527 | goto build_resources; | |
528 | ||
8f96cd1a DM |
529 | slot = regs->which_io; |
530 | ||
9d7ab1f4 DM |
531 | /* If SBI's parent is not io-unit or the io-unit lacks |
532 | * a "board#" property, something is very wrong. | |
533 | */ | |
534 | if (!sbi->parent || strcmp(sbi->parent->name, "io-unit")) { | |
535 | printk("%s: Error, parent is not io-unit.\n", | |
536 | sbi->full_name); | |
537 | goto build_resources; | |
538 | } | |
539 | io_unit = sbi->parent; | |
540 | board = of_getintprop_default(io_unit, "board#", -1); | |
541 | if (board == -1) { | |
542 | printk("%s: Error, lacks board# property.\n", | |
543 | io_unit->full_name); | |
544 | goto build_resources; | |
545 | } | |
546 | ||
8f96cd1a DM |
547 | for (i = 0; i < op->num_irqs; i++) { |
548 | int this_irq = op->irqs[i]; | |
549 | int sbusl = pil_to_sbus[this_irq]; | |
550 | ||
551 | if (sbusl) | |
552 | this_irq = (((board + 1) << 5) + | |
553 | (sbusl << 2) + | |
554 | slot); | |
555 | ||
556 | op->irqs[i] = this_irq; | |
557 | } | |
558 | } | |
cf44bbc2 | 559 | |
9d7ab1f4 | 560 | build_resources: |
cf44bbc2 DM |
561 | build_device_resources(op, parent); |
562 | ||
563 | op->dev.parent = parent; | |
37b7754a | 564 | op->dev.bus = &of_platform_bus_type; |
cf44bbc2 | 565 | if (!parent) |
5acdc1fa | 566 | dev_set_name(&op->dev, "root"); |
cf44bbc2 | 567 | else |
5acdc1fa | 568 | dev_set_name(&op->dev, "%08x", dp->node); |
cf44bbc2 DM |
569 | |
570 | if (of_device_register(op)) { | |
571 | printk("%s: Could not register of device.\n", | |
572 | dp->full_name); | |
573 | kfree(op); | |
574 | op = NULL; | |
575 | } | |
576 | ||
577 | return op; | |
578 | } | |
579 | ||
580 | static void __init scan_tree(struct device_node *dp, struct device *parent) | |
581 | { | |
582 | while (dp) { | |
583 | struct of_device *op = scan_one_device(dp, parent); | |
584 | ||
585 | if (op) | |
586 | scan_tree(dp->child, &op->dev); | |
587 | ||
588 | dp = dp->sibling; | |
589 | } | |
590 | } | |
591 | ||
592 | static void __init scan_of_devices(void) | |
593 | { | |
594 | struct device_node *root = of_find_node_by_path("/"); | |
595 | struct of_device *parent; | |
596 | ||
597 | parent = scan_one_device(root, NULL); | |
598 | if (!parent) | |
599 | return; | |
600 | ||
601 | scan_tree(root->child, &parent->dev); | |
602 | } | |
603 | ||
fd531431 DM |
604 | static int __init of_bus_driver_init(void) |
605 | { | |
cf44bbc2 | 606 | int err; |
fd531431 | 607 | |
3f23de10 | 608 | err = of_bus_type_init(&of_platform_bus_type, "of"); |
cf44bbc2 DM |
609 | if (!err) |
610 | scan_of_devices(); | |
611 | ||
612 | return err; | |
fd531431 DM |
613 | } |
614 | ||
615 | postcore_initcall(of_bus_driver_init); | |
616 | ||
a83f9823 DM |
617 | static int __init of_debug(char *str) |
618 | { | |
619 | int val = 0; | |
620 | ||
621 | get_option(&str, &val); | |
622 | if (val & 1) | |
623 | of_resource_verbose = 1; | |
624 | return 1; | |
625 | } | |
626 | ||
627 | __setup("of_debug=", of_debug); |