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Commit | Line | Data |
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6494d708 SG |
1 | /* |
2 | * Device manager | |
3 | * | |
4 | * Copyright (c) 2013 Google, Inc | |
5 | * | |
6 | * (C) Copyright 2012 | |
7 | * Pavel Herrmann <morpheus.ibis@gmail.com> | |
8 | * | |
9 | * SPDX-License-Identifier: GPL-2.0+ | |
10 | */ | |
11 | ||
12 | #include <common.h> | |
7c616862 | 13 | #include <asm/io.h> |
5a66a8ff | 14 | #include <fdtdec.h> |
ef5cd330 | 15 | #include <fdt_support.h> |
6494d708 SG |
16 | #include <malloc.h> |
17 | #include <dm/device.h> | |
18 | #include <dm/device-internal.h> | |
19 | #include <dm/lists.h> | |
d90a5a30 | 20 | #include <dm/pinctrl.h> |
6494d708 | 21 | #include <dm/platdata.h> |
396e343b | 22 | #include <dm/read.h> |
6494d708 SG |
23 | #include <dm/uclass.h> |
24 | #include <dm/uclass-internal.h> | |
25 | #include <dm/util.h> | |
26 | #include <linux/err.h> | |
27 | #include <linux/list.h> | |
28 | ||
5a66a8ff SG |
29 | DECLARE_GLOBAL_DATA_PTR; |
30 | ||
daac3bfe SW |
31 | static int device_bind_common(struct udevice *parent, const struct driver *drv, |
32 | const char *name, void *platdata, | |
7a61b0b5 | 33 | ulong driver_data, ofnode node, |
9fa28190 | 34 | uint of_platdata_size, struct udevice **devp) |
6494d708 | 35 | { |
54c5d08a | 36 | struct udevice *dev; |
6494d708 | 37 | struct uclass *uc; |
5eaed880 | 38 | int size, ret = 0; |
6494d708 | 39 | |
e6cabe4a MY |
40 | if (devp) |
41 | *devp = NULL; | |
6494d708 SG |
42 | if (!name) |
43 | return -EINVAL; | |
44 | ||
45 | ret = uclass_get(drv->id, &uc); | |
3346c876 SG |
46 | if (ret) { |
47 | debug("Missing uclass for driver %s\n", drv->name); | |
6494d708 | 48 | return ret; |
3346c876 | 49 | } |
6494d708 | 50 | |
54c5d08a | 51 | dev = calloc(1, sizeof(struct udevice)); |
6494d708 SG |
52 | if (!dev) |
53 | return -ENOMEM; | |
54 | ||
55 | INIT_LIST_HEAD(&dev->sibling_node); | |
56 | INIT_LIST_HEAD(&dev->child_head); | |
57 | INIT_LIST_HEAD(&dev->uclass_node); | |
e2282d70 | 58 | #ifdef CONFIG_DEVRES |
608f26c5 | 59 | INIT_LIST_HEAD(&dev->devres_head); |
e2282d70 | 60 | #endif |
6494d708 | 61 | dev->platdata = platdata; |
daac3bfe | 62 | dev->driver_data = driver_data; |
6494d708 | 63 | dev->name = name; |
7a61b0b5 | 64 | dev->node = node; |
6494d708 SG |
65 | dev->parent = parent; |
66 | dev->driver = drv; | |
67 | dev->uclass = uc; | |
5a66a8ff | 68 | |
5a66a8ff | 69 | dev->seq = -1; |
9cc36a2b | 70 | dev->req_seq = -1; |
4f627c5a | 71 | if (CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_SEQ_ALIAS)) { |
36fa61dc | 72 | /* |
770eb30e SR |
73 | * Some devices, such as a SPI bus, I2C bus and serial ports |
74 | * are numbered using aliases. | |
75 | * | |
76 | * This is just a 'requested' sequence, and will be | |
77 | * resolved (and ->seq updated) when the device is probed. | |
78 | */ | |
36fa61dc | 79 | if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) { |
7a61b0b5 | 80 | if (uc->uc_drv->name && ofnode_valid(node)) { |
396e343b | 81 | dev_read_alias_seq(dev, &dev->req_seq); |
36fa61dc | 82 | } |
9cc36a2b | 83 | } |
5a66a8ff | 84 | } |
36fa61dc | 85 | |
9fa28190 SG |
86 | if (drv->platdata_auto_alloc_size) { |
87 | bool alloc = !platdata; | |
88 | ||
89 | if (CONFIG_IS_ENABLED(OF_PLATDATA)) { | |
90 | if (of_platdata_size) { | |
91 | dev->flags |= DM_FLAG_OF_PLATDATA; | |
92 | if (of_platdata_size < | |
93 | drv->platdata_auto_alloc_size) | |
94 | alloc = true; | |
95 | } | |
96 | } | |
97 | if (alloc) { | |
98 | dev->flags |= DM_FLAG_ALLOC_PDATA; | |
99 | dev->platdata = calloc(1, | |
100 | drv->platdata_auto_alloc_size); | |
101 | if (!dev->platdata) { | |
102 | ret = -ENOMEM; | |
103 | goto fail_alloc1; | |
104 | } | |
105 | if (CONFIG_IS_ENABLED(OF_PLATDATA) && platdata) { | |
106 | memcpy(dev->platdata, platdata, | |
107 | of_platdata_size); | |
108 | } | |
f8a85449 SG |
109 | } |
110 | } | |
cdc133bd | 111 | |
5eaed880 PM |
112 | size = uc->uc_drv->per_device_platdata_auto_alloc_size; |
113 | if (size) { | |
114 | dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA; | |
115 | dev->uclass_platdata = calloc(1, size); | |
116 | if (!dev->uclass_platdata) { | |
117 | ret = -ENOMEM; | |
118 | goto fail_alloc2; | |
119 | } | |
120 | } | |
121 | ||
122 | if (parent) { | |
123 | size = parent->driver->per_child_platdata_auto_alloc_size; | |
ba8da9dc SG |
124 | if (!size) { |
125 | size = parent->uclass->uc_drv-> | |
126 | per_child_platdata_auto_alloc_size; | |
127 | } | |
cdc133bd SG |
128 | if (size) { |
129 | dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA; | |
130 | dev->parent_platdata = calloc(1, size); | |
131 | if (!dev->parent_platdata) { | |
132 | ret = -ENOMEM; | |
5eaed880 | 133 | goto fail_alloc3; |
cdc133bd SG |
134 | } |
135 | } | |
136 | } | |
6494d708 SG |
137 | |
138 | /* put dev into parent's successor list */ | |
139 | if (parent) | |
140 | list_add_tail(&dev->sibling_node, &parent->child_head); | |
141 | ||
142 | ret = uclass_bind_device(dev); | |
143 | if (ret) | |
72ebfe86 | 144 | goto fail_uclass_bind; |
6494d708 SG |
145 | |
146 | /* if we fail to bind we remove device from successors and free it */ | |
147 | if (drv->bind) { | |
148 | ret = drv->bind(dev); | |
72ebfe86 | 149 | if (ret) |
6494d708 | 150 | goto fail_bind; |
6494d708 | 151 | } |
0118ce79 SG |
152 | if (parent && parent->driver->child_post_bind) { |
153 | ret = parent->driver->child_post_bind(dev); | |
154 | if (ret) | |
155 | goto fail_child_post_bind; | |
156 | } | |
20af3c0a SG |
157 | if (uc->uc_drv->post_bind) { |
158 | ret = uc->uc_drv->post_bind(dev); | |
159 | if (ret) | |
160 | goto fail_uclass_post_bind; | |
161 | } | |
0118ce79 | 162 | |
6494d708 SG |
163 | if (parent) |
164 | dm_dbg("Bound device %s to %s\n", dev->name, parent->name); | |
e6cabe4a MY |
165 | if (devp) |
166 | *devp = dev; | |
6494d708 | 167 | |
aed1a4dd MY |
168 | dev->flags |= DM_FLAG_BOUND; |
169 | ||
6494d708 SG |
170 | return 0; |
171 | ||
20af3c0a SG |
172 | fail_uclass_post_bind: |
173 | /* There is no child unbind() method, so no clean-up required */ | |
0118ce79 | 174 | fail_child_post_bind: |
0a5804b5 | 175 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
176 | if (drv->unbind && drv->unbind(dev)) { |
177 | dm_warn("unbind() method failed on dev '%s' on error path\n", | |
178 | dev->name); | |
179 | } | |
0118ce79 SG |
180 | } |
181 | ||
6494d708 | 182 | fail_bind: |
0a5804b5 | 183 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
184 | if (uclass_unbind_device(dev)) { |
185 | dm_warn("Failed to unbind dev '%s' on error path\n", | |
186 | dev->name); | |
187 | } | |
72ebfe86 SG |
188 | } |
189 | fail_uclass_bind: | |
0a5804b5 | 190 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
191 | list_del(&dev->sibling_node); |
192 | if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) { | |
193 | free(dev->parent_platdata); | |
194 | dev->parent_platdata = NULL; | |
195 | } | |
cdc133bd | 196 | } |
5eaed880 PM |
197 | fail_alloc3: |
198 | if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) { | |
199 | free(dev->uclass_platdata); | |
200 | dev->uclass_platdata = NULL; | |
201 | } | |
cdc133bd | 202 | fail_alloc2: |
f8a85449 SG |
203 | if (dev->flags & DM_FLAG_ALLOC_PDATA) { |
204 | free(dev->platdata); | |
205 | dev->platdata = NULL; | |
206 | } | |
207 | fail_alloc1: | |
608f26c5 MY |
208 | devres_release_all(dev); |
209 | ||
6494d708 | 210 | free(dev); |
72ebfe86 | 211 | |
6494d708 SG |
212 | return ret; |
213 | } | |
214 | ||
daac3bfe SW |
215 | int device_bind_with_driver_data(struct udevice *parent, |
216 | const struct driver *drv, const char *name, | |
396e343b | 217 | ulong driver_data, ofnode node, |
daac3bfe SW |
218 | struct udevice **devp) |
219 | { | |
396e343b SG |
220 | return device_bind_common(parent, drv, name, NULL, driver_data, node, |
221 | 0, devp); | |
daac3bfe SW |
222 | } |
223 | ||
224 | int device_bind(struct udevice *parent, const struct driver *drv, | |
225 | const char *name, void *platdata, int of_offset, | |
226 | struct udevice **devp) | |
227 | { | |
7a61b0b5 SG |
228 | return device_bind_common(parent, drv, name, platdata, 0, |
229 | offset_to_ofnode(of_offset), 0, devp); | |
daac3bfe SW |
230 | } |
231 | ||
00606d7e SG |
232 | int device_bind_by_name(struct udevice *parent, bool pre_reloc_only, |
233 | const struct driver_info *info, struct udevice **devp) | |
6494d708 SG |
234 | { |
235 | struct driver *drv; | |
9fa28190 | 236 | uint platdata_size = 0; |
6494d708 SG |
237 | |
238 | drv = lists_driver_lookup_name(info->name); | |
239 | if (!drv) | |
240 | return -ENOENT; | |
00606d7e SG |
241 | if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC)) |
242 | return -EPERM; | |
6494d708 | 243 | |
9fa28190 SG |
244 | #if CONFIG_IS_ENABLED(OF_PLATDATA) |
245 | platdata_size = info->platdata_size; | |
246 | #endif | |
247 | return device_bind_common(parent, drv, info->name, | |
396e343b SG |
248 | (void *)info->platdata, 0, ofnode_null(), platdata_size, |
249 | devp); | |
6494d708 SG |
250 | } |
251 | ||
2c03c463 SG |
252 | static void *alloc_priv(int size, uint flags) |
253 | { | |
254 | void *priv; | |
255 | ||
256 | if (flags & DM_FLAG_ALLOC_PRIV_DMA) { | |
257 | priv = memalign(ARCH_DMA_MINALIGN, size); | |
5a8a8045 | 258 | if (priv) { |
2c03c463 | 259 | memset(priv, '\0', size); |
5a8a8045 SG |
260 | |
261 | /* | |
262 | * Ensure that the zero bytes are flushed to memory. | |
263 | * This prevents problems if the driver uses this as | |
264 | * both an input and an output buffer: | |
265 | * | |
266 | * 1. Zeroes written to buffer (here) and sit in the | |
267 | * cache | |
268 | * 2. Driver issues a read command to DMA | |
269 | * 3. CPU runs out of cache space and evicts some cache | |
270 | * data in the buffer, writing zeroes to RAM from | |
271 | * the memset() above | |
272 | * 4. DMA completes | |
273 | * 5. Buffer now has some DMA data and some zeroes | |
274 | * 6. Data being read is now incorrect | |
275 | * | |
276 | * To prevent this, ensure that the cache is clean | |
277 | * within this range at the start. The driver can then | |
278 | * use normal flush-after-write, invalidate-before-read | |
279 | * procedures. | |
280 | * | |
281 | * TODO(sjg@chromium.org): Drop this microblaze | |
282 | * exception. | |
283 | */ | |
284 | #ifndef CONFIG_MICROBLAZE | |
285 | flush_dcache_range((ulong)priv, (ulong)priv + size); | |
286 | #endif | |
287 | } | |
2c03c463 SG |
288 | } else { |
289 | priv = calloc(1, size); | |
290 | } | |
291 | ||
292 | return priv; | |
293 | } | |
294 | ||
c6db965f | 295 | int device_probe(struct udevice *dev) |
6494d708 | 296 | { |
3479253d | 297 | const struct driver *drv; |
6494d708 SG |
298 | int size = 0; |
299 | int ret; | |
5a66a8ff | 300 | int seq; |
6494d708 SG |
301 | |
302 | if (!dev) | |
303 | return -EINVAL; | |
304 | ||
305 | if (dev->flags & DM_FLAG_ACTIVATED) | |
306 | return 0; | |
307 | ||
308 | drv = dev->driver; | |
309 | assert(drv); | |
310 | ||
cdeb2ba9 BM |
311 | /* Allocate private data if requested and not reentered */ |
312 | if (drv->priv_auto_alloc_size && !dev->priv) { | |
2c03c463 | 313 | dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags); |
6494d708 SG |
314 | if (!dev->priv) { |
315 | ret = -ENOMEM; | |
316 | goto fail; | |
317 | } | |
318 | } | |
cdeb2ba9 | 319 | /* Allocate private data if requested and not reentered */ |
6494d708 | 320 | size = dev->uclass->uc_drv->per_device_auto_alloc_size; |
cdeb2ba9 | 321 | if (size && !dev->uclass_priv) { |
6494d708 SG |
322 | dev->uclass_priv = calloc(1, size); |
323 | if (!dev->uclass_priv) { | |
324 | ret = -ENOMEM; | |
325 | goto fail; | |
326 | } | |
327 | } | |
328 | ||
329 | /* Ensure all parents are probed */ | |
330 | if (dev->parent) { | |
e59f458d | 331 | size = dev->parent->driver->per_child_auto_alloc_size; |
dac8db2c SG |
332 | if (!size) { |
333 | size = dev->parent->uclass->uc_drv-> | |
334 | per_child_auto_alloc_size; | |
335 | } | |
cdeb2ba9 | 336 | if (size && !dev->parent_priv) { |
2c03c463 | 337 | dev->parent_priv = alloc_priv(size, drv->flags); |
e59f458d SG |
338 | if (!dev->parent_priv) { |
339 | ret = -ENOMEM; | |
340 | goto fail; | |
341 | } | |
342 | } | |
343 | ||
6494d708 SG |
344 | ret = device_probe(dev->parent); |
345 | if (ret) | |
346 | goto fail; | |
cdeb2ba9 BM |
347 | |
348 | /* | |
349 | * The device might have already been probed during | |
350 | * the call to device_probe() on its parent device | |
351 | * (e.g. PCI bridge devices). Test the flags again | |
352 | * so that we don't mess up the device. | |
353 | */ | |
354 | if (dev->flags & DM_FLAG_ACTIVATED) | |
355 | return 0; | |
6494d708 SG |
356 | } |
357 | ||
5a66a8ff SG |
358 | seq = uclass_resolve_seq(dev); |
359 | if (seq < 0) { | |
360 | ret = seq; | |
361 | goto fail; | |
362 | } | |
363 | dev->seq = seq; | |
364 | ||
206d4d2b SG |
365 | dev->flags |= DM_FLAG_ACTIVATED; |
366 | ||
84d26e29 SG |
367 | /* |
368 | * Process pinctrl for everything except the root device, and | |
0379597e SG |
369 | * continue regardless of the result of pinctrl. Don't process pinctrl |
370 | * settings for pinctrl devices since the device may not yet be | |
371 | * probed. | |
84d26e29 | 372 | */ |
0379597e | 373 | if (dev->parent && device_get_uclass_id(dev) != UCLASS_PINCTRL) |
84d26e29 | 374 | pinctrl_select_state(dev, "default"); |
d90a5a30 | 375 | |
02c07b37 | 376 | ret = uclass_pre_probe_device(dev); |
83c7e434 SG |
377 | if (ret) |
378 | goto fail; | |
379 | ||
a327dee0 SG |
380 | if (dev->parent && dev->parent->driver->child_pre_probe) { |
381 | ret = dev->parent->driver->child_pre_probe(dev); | |
382 | if (ret) | |
383 | goto fail; | |
384 | } | |
385 | ||
396e343b | 386 | if (drv->ofdata_to_platdata && dev_has_of_node(dev)) { |
6494d708 SG |
387 | ret = drv->ofdata_to_platdata(dev); |
388 | if (ret) | |
389 | goto fail; | |
390 | } | |
391 | ||
392 | if (drv->probe) { | |
393 | ret = drv->probe(dev); | |
02eeb1bb SG |
394 | if (ret) { |
395 | dev->flags &= ~DM_FLAG_ACTIVATED; | |
6494d708 | 396 | goto fail; |
02eeb1bb | 397 | } |
6494d708 SG |
398 | } |
399 | ||
6494d708 | 400 | ret = uclass_post_probe_device(dev); |
206d4d2b | 401 | if (ret) |
6494d708 | 402 | goto fail_uclass; |
6494d708 | 403 | |
c3ab9853 PF |
404 | if (dev->parent && device_get_uclass_id(dev) == UCLASS_PINCTRL) |
405 | pinctrl_select_state(dev, "default"); | |
406 | ||
6494d708 SG |
407 | return 0; |
408 | fail_uclass: | |
706865af | 409 | if (device_remove(dev, DM_REMOVE_NORMAL)) { |
6494d708 SG |
410 | dm_warn("%s: Device '%s' failed to remove on error path\n", |
411 | __func__, dev->name); | |
412 | } | |
413 | fail: | |
206d4d2b SG |
414 | dev->flags &= ~DM_FLAG_ACTIVATED; |
415 | ||
5a66a8ff | 416 | dev->seq = -1; |
6494d708 SG |
417 | device_free(dev); |
418 | ||
419 | return ret; | |
420 | } | |
421 | ||
54c5d08a | 422 | void *dev_get_platdata(struct udevice *dev) |
6494d708 SG |
423 | { |
424 | if (!dev) { | |
964d153c | 425 | dm_warn("%s: null device\n", __func__); |
6494d708 SG |
426 | return NULL; |
427 | } | |
428 | ||
429 | return dev->platdata; | |
430 | } | |
431 | ||
cdc133bd SG |
432 | void *dev_get_parent_platdata(struct udevice *dev) |
433 | { | |
434 | if (!dev) { | |
36d7cc17 | 435 | dm_warn("%s: null device\n", __func__); |
cdc133bd SG |
436 | return NULL; |
437 | } | |
438 | ||
439 | return dev->parent_platdata; | |
440 | } | |
441 | ||
5eaed880 PM |
442 | void *dev_get_uclass_platdata(struct udevice *dev) |
443 | { | |
444 | if (!dev) { | |
36d7cc17 | 445 | dm_warn("%s: null device\n", __func__); |
5eaed880 PM |
446 | return NULL; |
447 | } | |
448 | ||
449 | return dev->uclass_platdata; | |
450 | } | |
451 | ||
54c5d08a | 452 | void *dev_get_priv(struct udevice *dev) |
6494d708 SG |
453 | { |
454 | if (!dev) { | |
964d153c | 455 | dm_warn("%s: null device\n", __func__); |
6494d708 SG |
456 | return NULL; |
457 | } | |
458 | ||
459 | return dev->priv; | |
460 | } | |
997c87bb | 461 | |
e564f054 SG |
462 | void *dev_get_uclass_priv(struct udevice *dev) |
463 | { | |
464 | if (!dev) { | |
465 | dm_warn("%s: null device\n", __func__); | |
466 | return NULL; | |
467 | } | |
468 | ||
469 | return dev->uclass_priv; | |
470 | } | |
471 | ||
bcbe3d15 | 472 | void *dev_get_parent_priv(struct udevice *dev) |
e59f458d SG |
473 | { |
474 | if (!dev) { | |
964d153c | 475 | dm_warn("%s: null device\n", __func__); |
e59f458d SG |
476 | return NULL; |
477 | } | |
478 | ||
479 | return dev->parent_priv; | |
480 | } | |
481 | ||
997c87bb SG |
482 | static int device_get_device_tail(struct udevice *dev, int ret, |
483 | struct udevice **devp) | |
484 | { | |
485 | if (ret) | |
486 | return ret; | |
487 | ||
488 | ret = device_probe(dev); | |
489 | if (ret) | |
490 | return ret; | |
491 | ||
492 | *devp = dev; | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | int device_get_child(struct udevice *parent, int index, struct udevice **devp) | |
498 | { | |
499 | struct udevice *dev; | |
500 | ||
501 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
502 | if (!index--) | |
503 | return device_get_device_tail(dev, 0, devp); | |
504 | } | |
505 | ||
506 | return -ENODEV; | |
507 | } | |
508 | ||
509 | int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq, | |
510 | bool find_req_seq, struct udevice **devp) | |
511 | { | |
512 | struct udevice *dev; | |
513 | ||
514 | *devp = NULL; | |
515 | if (seq_or_req_seq == -1) | |
516 | return -ENODEV; | |
517 | ||
518 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
519 | if ((find_req_seq ? dev->req_seq : dev->seq) == | |
520 | seq_or_req_seq) { | |
521 | *devp = dev; | |
522 | return 0; | |
523 | } | |
524 | } | |
525 | ||
526 | return -ENODEV; | |
527 | } | |
528 | ||
529 | int device_get_child_by_seq(struct udevice *parent, int seq, | |
530 | struct udevice **devp) | |
531 | { | |
532 | struct udevice *dev; | |
533 | int ret; | |
534 | ||
535 | *devp = NULL; | |
536 | ret = device_find_child_by_seq(parent, seq, false, &dev); | |
537 | if (ret == -ENODEV) { | |
538 | /* | |
539 | * We didn't find it in probed devices. See if there is one | |
540 | * that will request this seq if probed. | |
541 | */ | |
542 | ret = device_find_child_by_seq(parent, seq, true, &dev); | |
543 | } | |
544 | return device_get_device_tail(dev, ret, devp); | |
545 | } | |
546 | ||
547 | int device_find_child_by_of_offset(struct udevice *parent, int of_offset, | |
548 | struct udevice **devp) | |
549 | { | |
550 | struct udevice *dev; | |
551 | ||
552 | *devp = NULL; | |
553 | ||
554 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
e160f7d4 | 555 | if (dev_of_offset(dev) == of_offset) { |
997c87bb SG |
556 | *devp = dev; |
557 | return 0; | |
558 | } | |
559 | } | |
560 | ||
561 | return -ENODEV; | |
562 | } | |
563 | ||
132f9bfc | 564 | int device_get_child_by_of_offset(struct udevice *parent, int node, |
997c87bb SG |
565 | struct udevice **devp) |
566 | { | |
567 | struct udevice *dev; | |
568 | int ret; | |
569 | ||
570 | *devp = NULL; | |
132f9bfc | 571 | ret = device_find_child_by_of_offset(parent, node, &dev); |
997c87bb SG |
572 | return device_get_device_tail(dev, ret, devp); |
573 | } | |
a8981d4f | 574 | |
2693047a SG |
575 | static struct udevice *_device_find_global_by_of_offset(struct udevice *parent, |
576 | int of_offset) | |
577 | { | |
578 | struct udevice *dev, *found; | |
579 | ||
e160f7d4 | 580 | if (dev_of_offset(parent) == of_offset) |
2693047a SG |
581 | return parent; |
582 | ||
583 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
584 | found = _device_find_global_by_of_offset(dev, of_offset); | |
585 | if (found) | |
586 | return found; | |
587 | } | |
588 | ||
589 | return NULL; | |
590 | } | |
591 | ||
592 | int device_get_global_by_of_offset(int of_offset, struct udevice **devp) | |
593 | { | |
594 | struct udevice *dev; | |
595 | ||
596 | dev = _device_find_global_by_of_offset(gd->dm_root, of_offset); | |
597 | return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp); | |
598 | } | |
599 | ||
a8981d4f SG |
600 | int device_find_first_child(struct udevice *parent, struct udevice **devp) |
601 | { | |
602 | if (list_empty(&parent->child_head)) { | |
603 | *devp = NULL; | |
604 | } else { | |
605 | *devp = list_first_entry(&parent->child_head, struct udevice, | |
606 | sibling_node); | |
607 | } | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | int device_find_next_child(struct udevice **devp) | |
613 | { | |
614 | struct udevice *dev = *devp; | |
615 | struct udevice *parent = dev->parent; | |
616 | ||
617 | if (list_is_last(&dev->sibling_node, &parent->child_head)) { | |
618 | *devp = NULL; | |
619 | } else { | |
620 | *devp = list_entry(dev->sibling_node.next, struct udevice, | |
621 | sibling_node); | |
622 | } | |
623 | ||
624 | return 0; | |
625 | } | |
2ef249b4 | 626 | |
479728cb SG |
627 | struct udevice *dev_get_parent(struct udevice *child) |
628 | { | |
629 | return child->parent; | |
630 | } | |
631 | ||
39de8433 | 632 | ulong dev_get_driver_data(struct udevice *dev) |
2ef249b4 | 633 | { |
39de8433 | 634 | return dev->driver_data; |
2ef249b4 | 635 | } |
b3670531 | 636 | |
cc73d37b PM |
637 | const void *dev_get_driver_ops(struct udevice *dev) |
638 | { | |
639 | if (!dev || !dev->driver->ops) | |
640 | return NULL; | |
641 | ||
642 | return dev->driver->ops; | |
643 | } | |
644 | ||
b3670531 SG |
645 | enum uclass_id device_get_uclass_id(struct udevice *dev) |
646 | { | |
647 | return dev->uclass->uc_drv->id; | |
648 | } | |
c9cac3f8 | 649 | |
f9c370dc PM |
650 | const char *dev_get_uclass_name(struct udevice *dev) |
651 | { | |
652 | if (!dev) | |
653 | return NULL; | |
654 | ||
655 | return dev->uclass->uc_drv->name; | |
656 | } | |
657 | ||
c5785673 SG |
658 | bool device_has_children(struct udevice *dev) |
659 | { | |
660 | return !list_empty(&dev->child_head); | |
661 | } | |
662 | ||
663 | bool device_has_active_children(struct udevice *dev) | |
664 | { | |
665 | struct udevice *child; | |
666 | ||
667 | for (device_find_first_child(dev, &child); | |
668 | child; | |
669 | device_find_next_child(&child)) { | |
670 | if (device_active(child)) | |
671 | return true; | |
672 | } | |
673 | ||
674 | return false; | |
675 | } | |
676 | ||
677 | bool device_is_last_sibling(struct udevice *dev) | |
678 | { | |
679 | struct udevice *parent = dev->parent; | |
680 | ||
681 | if (!parent) | |
682 | return false; | |
683 | return list_is_last(&dev->sibling_node, &parent->child_head); | |
684 | } | |
f5c67ea0 | 685 | |
a2040fac SG |
686 | void device_set_name_alloced(struct udevice *dev) |
687 | { | |
fd1c2d9b | 688 | dev->flags |= DM_FLAG_NAME_ALLOCED; |
a2040fac SG |
689 | } |
690 | ||
f5c67ea0 SG |
691 | int device_set_name(struct udevice *dev, const char *name) |
692 | { | |
693 | name = strdup(name); | |
694 | if (!name) | |
695 | return -ENOMEM; | |
696 | dev->name = name; | |
a2040fac | 697 | device_set_name_alloced(dev); |
f5c67ea0 SG |
698 | |
699 | return 0; | |
700 | } | |
73443b9e | 701 | |
911f3aef | 702 | bool device_is_compatible(struct udevice *dev, const char *compat) |
73443b9e M |
703 | { |
704 | const void *fdt = gd->fdt_blob; | |
705 | ||
e160f7d4 | 706 | return !fdt_node_check_compatible(fdt, dev_of_offset(dev), compat); |
73443b9e M |
707 | } |
708 | ||
709 | bool of_machine_is_compatible(const char *compat) | |
710 | { | |
711 | const void *fdt = gd->fdt_blob; | |
712 | ||
713 | return !fdt_node_check_compatible(fdt, 0, compat); | |
714 | } |