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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> |
f4fcba5c | 14 | #include <clk.h> |
5a66a8ff | 15 | #include <fdtdec.h> |
ef5cd330 | 16 | #include <fdt_support.h> |
6494d708 SG |
17 | #include <malloc.h> |
18 | #include <dm/device.h> | |
19 | #include <dm/device-internal.h> | |
20 | #include <dm/lists.h> | |
29d11b88 | 21 | #include <dm/of_access.h> |
d90a5a30 | 22 | #include <dm/pinctrl.h> |
6494d708 | 23 | #include <dm/platdata.h> |
396e343b | 24 | #include <dm/read.h> |
6494d708 SG |
25 | #include <dm/uclass.h> |
26 | #include <dm/uclass-internal.h> | |
27 | #include <dm/util.h> | |
28 | #include <linux/err.h> | |
29 | #include <linux/list.h> | |
30 | ||
5a66a8ff SG |
31 | DECLARE_GLOBAL_DATA_PTR; |
32 | ||
daac3bfe SW |
33 | static int device_bind_common(struct udevice *parent, const struct driver *drv, |
34 | const char *name, void *platdata, | |
7a61b0b5 | 35 | ulong driver_data, ofnode node, |
9fa28190 | 36 | uint of_platdata_size, struct udevice **devp) |
6494d708 | 37 | { |
54c5d08a | 38 | struct udevice *dev; |
6494d708 | 39 | struct uclass *uc; |
5eaed880 | 40 | int size, ret = 0; |
6494d708 | 41 | |
e6cabe4a MY |
42 | if (devp) |
43 | *devp = NULL; | |
6494d708 SG |
44 | if (!name) |
45 | return -EINVAL; | |
46 | ||
47 | ret = uclass_get(drv->id, &uc); | |
3346c876 SG |
48 | if (ret) { |
49 | debug("Missing uclass for driver %s\n", drv->name); | |
6494d708 | 50 | return ret; |
3346c876 | 51 | } |
6494d708 | 52 | |
54c5d08a | 53 | dev = calloc(1, sizeof(struct udevice)); |
6494d708 SG |
54 | if (!dev) |
55 | return -ENOMEM; | |
56 | ||
57 | INIT_LIST_HEAD(&dev->sibling_node); | |
58 | INIT_LIST_HEAD(&dev->child_head); | |
59 | INIT_LIST_HEAD(&dev->uclass_node); | |
e2282d70 | 60 | #ifdef CONFIG_DEVRES |
608f26c5 | 61 | INIT_LIST_HEAD(&dev->devres_head); |
e2282d70 | 62 | #endif |
6494d708 | 63 | dev->platdata = platdata; |
daac3bfe | 64 | dev->driver_data = driver_data; |
6494d708 | 65 | dev->name = name; |
7a61b0b5 | 66 | dev->node = node; |
6494d708 SG |
67 | dev->parent = parent; |
68 | dev->driver = drv; | |
69 | dev->uclass = uc; | |
5a66a8ff | 70 | |
5a66a8ff | 71 | dev->seq = -1; |
9cc36a2b | 72 | dev->req_seq = -1; |
4f627c5a | 73 | if (CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_SEQ_ALIAS)) { |
36fa61dc | 74 | /* |
770eb30e SR |
75 | * Some devices, such as a SPI bus, I2C bus and serial ports |
76 | * are numbered using aliases. | |
77 | * | |
78 | * This is just a 'requested' sequence, and will be | |
79 | * resolved (and ->seq updated) when the device is probed. | |
80 | */ | |
36fa61dc | 81 | if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) { |
7a61b0b5 | 82 | if (uc->uc_drv->name && ofnode_valid(node)) { |
396e343b | 83 | dev_read_alias_seq(dev, &dev->req_seq); |
36fa61dc | 84 | } |
9cc36a2b | 85 | } |
5a66a8ff | 86 | } |
36fa61dc | 87 | |
9fa28190 SG |
88 | if (drv->platdata_auto_alloc_size) { |
89 | bool alloc = !platdata; | |
90 | ||
91 | if (CONFIG_IS_ENABLED(OF_PLATDATA)) { | |
92 | if (of_platdata_size) { | |
93 | dev->flags |= DM_FLAG_OF_PLATDATA; | |
94 | if (of_platdata_size < | |
95 | drv->platdata_auto_alloc_size) | |
96 | alloc = true; | |
97 | } | |
98 | } | |
99 | if (alloc) { | |
100 | dev->flags |= DM_FLAG_ALLOC_PDATA; | |
101 | dev->platdata = calloc(1, | |
102 | drv->platdata_auto_alloc_size); | |
103 | if (!dev->platdata) { | |
104 | ret = -ENOMEM; | |
105 | goto fail_alloc1; | |
106 | } | |
107 | if (CONFIG_IS_ENABLED(OF_PLATDATA) && platdata) { | |
108 | memcpy(dev->platdata, platdata, | |
109 | of_platdata_size); | |
110 | } | |
f8a85449 SG |
111 | } |
112 | } | |
cdc133bd | 113 | |
5eaed880 PM |
114 | size = uc->uc_drv->per_device_platdata_auto_alloc_size; |
115 | if (size) { | |
116 | dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA; | |
117 | dev->uclass_platdata = calloc(1, size); | |
118 | if (!dev->uclass_platdata) { | |
119 | ret = -ENOMEM; | |
120 | goto fail_alloc2; | |
121 | } | |
122 | } | |
123 | ||
124 | if (parent) { | |
125 | size = parent->driver->per_child_platdata_auto_alloc_size; | |
ba8da9dc SG |
126 | if (!size) { |
127 | size = parent->uclass->uc_drv-> | |
128 | per_child_platdata_auto_alloc_size; | |
129 | } | |
cdc133bd SG |
130 | if (size) { |
131 | dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA; | |
132 | dev->parent_platdata = calloc(1, size); | |
133 | if (!dev->parent_platdata) { | |
134 | ret = -ENOMEM; | |
5eaed880 | 135 | goto fail_alloc3; |
cdc133bd SG |
136 | } |
137 | } | |
138 | } | |
6494d708 SG |
139 | |
140 | /* put dev into parent's successor list */ | |
141 | if (parent) | |
142 | list_add_tail(&dev->sibling_node, &parent->child_head); | |
143 | ||
144 | ret = uclass_bind_device(dev); | |
145 | if (ret) | |
72ebfe86 | 146 | goto fail_uclass_bind; |
6494d708 SG |
147 | |
148 | /* if we fail to bind we remove device from successors and free it */ | |
149 | if (drv->bind) { | |
150 | ret = drv->bind(dev); | |
72ebfe86 | 151 | if (ret) |
6494d708 | 152 | goto fail_bind; |
6494d708 | 153 | } |
0118ce79 SG |
154 | if (parent && parent->driver->child_post_bind) { |
155 | ret = parent->driver->child_post_bind(dev); | |
156 | if (ret) | |
157 | goto fail_child_post_bind; | |
158 | } | |
20af3c0a SG |
159 | if (uc->uc_drv->post_bind) { |
160 | ret = uc->uc_drv->post_bind(dev); | |
161 | if (ret) | |
162 | goto fail_uclass_post_bind; | |
163 | } | |
0118ce79 | 164 | |
6494d708 | 165 | if (parent) |
ceb91909 | 166 | pr_debug("Bound device %s to %s\n", dev->name, parent->name); |
e6cabe4a MY |
167 | if (devp) |
168 | *devp = dev; | |
6494d708 | 169 | |
aed1a4dd MY |
170 | dev->flags |= DM_FLAG_BOUND; |
171 | ||
6494d708 SG |
172 | return 0; |
173 | ||
20af3c0a SG |
174 | fail_uclass_post_bind: |
175 | /* There is no child unbind() method, so no clean-up required */ | |
0118ce79 | 176 | fail_child_post_bind: |
0a5804b5 | 177 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
178 | if (drv->unbind && drv->unbind(dev)) { |
179 | dm_warn("unbind() method failed on dev '%s' on error path\n", | |
180 | dev->name); | |
181 | } | |
0118ce79 SG |
182 | } |
183 | ||
6494d708 | 184 | fail_bind: |
0a5804b5 | 185 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
186 | if (uclass_unbind_device(dev)) { |
187 | dm_warn("Failed to unbind dev '%s' on error path\n", | |
188 | dev->name); | |
189 | } | |
72ebfe86 SG |
190 | } |
191 | fail_uclass_bind: | |
0a5804b5 | 192 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
193 | list_del(&dev->sibling_node); |
194 | if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) { | |
195 | free(dev->parent_platdata); | |
196 | dev->parent_platdata = NULL; | |
197 | } | |
cdc133bd | 198 | } |
5eaed880 PM |
199 | fail_alloc3: |
200 | if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) { | |
201 | free(dev->uclass_platdata); | |
202 | dev->uclass_platdata = NULL; | |
203 | } | |
cdc133bd | 204 | fail_alloc2: |
f8a85449 SG |
205 | if (dev->flags & DM_FLAG_ALLOC_PDATA) { |
206 | free(dev->platdata); | |
207 | dev->platdata = NULL; | |
208 | } | |
209 | fail_alloc1: | |
608f26c5 MY |
210 | devres_release_all(dev); |
211 | ||
6494d708 | 212 | free(dev); |
72ebfe86 | 213 | |
6494d708 SG |
214 | return ret; |
215 | } | |
216 | ||
daac3bfe SW |
217 | int device_bind_with_driver_data(struct udevice *parent, |
218 | const struct driver *drv, const char *name, | |
396e343b | 219 | ulong driver_data, ofnode node, |
daac3bfe SW |
220 | struct udevice **devp) |
221 | { | |
396e343b SG |
222 | return device_bind_common(parent, drv, name, NULL, driver_data, node, |
223 | 0, devp); | |
daac3bfe SW |
224 | } |
225 | ||
226 | int device_bind(struct udevice *parent, const struct driver *drv, | |
227 | const char *name, void *platdata, int of_offset, | |
228 | struct udevice **devp) | |
229 | { | |
7a61b0b5 SG |
230 | return device_bind_common(parent, drv, name, platdata, 0, |
231 | offset_to_ofnode(of_offset), 0, devp); | |
daac3bfe SW |
232 | } |
233 | ||
00606d7e SG |
234 | int device_bind_by_name(struct udevice *parent, bool pre_reloc_only, |
235 | const struct driver_info *info, struct udevice **devp) | |
6494d708 SG |
236 | { |
237 | struct driver *drv; | |
9fa28190 | 238 | uint platdata_size = 0; |
6494d708 SG |
239 | |
240 | drv = lists_driver_lookup_name(info->name); | |
241 | if (!drv) | |
242 | return -ENOENT; | |
00606d7e SG |
243 | if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC)) |
244 | return -EPERM; | |
6494d708 | 245 | |
9fa28190 SG |
246 | #if CONFIG_IS_ENABLED(OF_PLATDATA) |
247 | platdata_size = info->platdata_size; | |
248 | #endif | |
249 | return device_bind_common(parent, drv, info->name, | |
396e343b SG |
250 | (void *)info->platdata, 0, ofnode_null(), platdata_size, |
251 | devp); | |
6494d708 SG |
252 | } |
253 | ||
2c03c463 SG |
254 | static void *alloc_priv(int size, uint flags) |
255 | { | |
256 | void *priv; | |
257 | ||
258 | if (flags & DM_FLAG_ALLOC_PRIV_DMA) { | |
5924da1d | 259 | size = ROUND(size, ARCH_DMA_MINALIGN); |
2c03c463 | 260 | priv = memalign(ARCH_DMA_MINALIGN, size); |
5a8a8045 | 261 | if (priv) { |
2c03c463 | 262 | memset(priv, '\0', size); |
5a8a8045 SG |
263 | |
264 | /* | |
265 | * Ensure that the zero bytes are flushed to memory. | |
266 | * This prevents problems if the driver uses this as | |
267 | * both an input and an output buffer: | |
268 | * | |
269 | * 1. Zeroes written to buffer (here) and sit in the | |
270 | * cache | |
271 | * 2. Driver issues a read command to DMA | |
272 | * 3. CPU runs out of cache space and evicts some cache | |
273 | * data in the buffer, writing zeroes to RAM from | |
274 | * the memset() above | |
275 | * 4. DMA completes | |
276 | * 5. Buffer now has some DMA data and some zeroes | |
277 | * 6. Data being read is now incorrect | |
278 | * | |
279 | * To prevent this, ensure that the cache is clean | |
280 | * within this range at the start. The driver can then | |
281 | * use normal flush-after-write, invalidate-before-read | |
282 | * procedures. | |
283 | * | |
284 | * TODO(sjg@chromium.org): Drop this microblaze | |
285 | * exception. | |
286 | */ | |
287 | #ifndef CONFIG_MICROBLAZE | |
288 | flush_dcache_range((ulong)priv, (ulong)priv + size); | |
289 | #endif | |
290 | } | |
2c03c463 SG |
291 | } else { |
292 | priv = calloc(1, size); | |
293 | } | |
294 | ||
295 | return priv; | |
296 | } | |
297 | ||
c6db965f | 298 | int device_probe(struct udevice *dev) |
6494d708 | 299 | { |
3479253d | 300 | const struct driver *drv; |
6494d708 SG |
301 | int size = 0; |
302 | int ret; | |
5a66a8ff | 303 | int seq; |
6494d708 SG |
304 | |
305 | if (!dev) | |
306 | return -EINVAL; | |
307 | ||
308 | if (dev->flags & DM_FLAG_ACTIVATED) | |
309 | return 0; | |
310 | ||
311 | drv = dev->driver; | |
312 | assert(drv); | |
313 | ||
cdeb2ba9 BM |
314 | /* Allocate private data if requested and not reentered */ |
315 | if (drv->priv_auto_alloc_size && !dev->priv) { | |
2c03c463 | 316 | dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags); |
6494d708 SG |
317 | if (!dev->priv) { |
318 | ret = -ENOMEM; | |
319 | goto fail; | |
320 | } | |
321 | } | |
cdeb2ba9 | 322 | /* Allocate private data if requested and not reentered */ |
6494d708 | 323 | size = dev->uclass->uc_drv->per_device_auto_alloc_size; |
cdeb2ba9 | 324 | if (size && !dev->uclass_priv) { |
6494d708 SG |
325 | dev->uclass_priv = calloc(1, size); |
326 | if (!dev->uclass_priv) { | |
327 | ret = -ENOMEM; | |
328 | goto fail; | |
329 | } | |
330 | } | |
331 | ||
332 | /* Ensure all parents are probed */ | |
333 | if (dev->parent) { | |
e59f458d | 334 | size = dev->parent->driver->per_child_auto_alloc_size; |
dac8db2c SG |
335 | if (!size) { |
336 | size = dev->parent->uclass->uc_drv-> | |
337 | per_child_auto_alloc_size; | |
338 | } | |
cdeb2ba9 | 339 | if (size && !dev->parent_priv) { |
2c03c463 | 340 | dev->parent_priv = alloc_priv(size, drv->flags); |
e59f458d SG |
341 | if (!dev->parent_priv) { |
342 | ret = -ENOMEM; | |
343 | goto fail; | |
344 | } | |
345 | } | |
346 | ||
6494d708 SG |
347 | ret = device_probe(dev->parent); |
348 | if (ret) | |
349 | goto fail; | |
cdeb2ba9 BM |
350 | |
351 | /* | |
352 | * The device might have already been probed during | |
353 | * the call to device_probe() on its parent device | |
354 | * (e.g. PCI bridge devices). Test the flags again | |
355 | * so that we don't mess up the device. | |
356 | */ | |
357 | if (dev->flags & DM_FLAG_ACTIVATED) | |
358 | return 0; | |
6494d708 SG |
359 | } |
360 | ||
5a66a8ff SG |
361 | seq = uclass_resolve_seq(dev); |
362 | if (seq < 0) { | |
363 | ret = seq; | |
364 | goto fail; | |
365 | } | |
366 | dev->seq = seq; | |
367 | ||
206d4d2b SG |
368 | dev->flags |= DM_FLAG_ACTIVATED; |
369 | ||
84d26e29 SG |
370 | /* |
371 | * Process pinctrl for everything except the root device, and | |
0379597e SG |
372 | * continue regardless of the result of pinctrl. Don't process pinctrl |
373 | * settings for pinctrl devices since the device may not yet be | |
374 | * probed. | |
84d26e29 | 375 | */ |
0379597e | 376 | if (dev->parent && device_get_uclass_id(dev) != UCLASS_PINCTRL) |
84d26e29 | 377 | pinctrl_select_state(dev, "default"); |
d90a5a30 | 378 | |
02c07b37 | 379 | ret = uclass_pre_probe_device(dev); |
83c7e434 SG |
380 | if (ret) |
381 | goto fail; | |
382 | ||
a327dee0 SG |
383 | if (dev->parent && dev->parent->driver->child_pre_probe) { |
384 | ret = dev->parent->driver->child_pre_probe(dev); | |
385 | if (ret) | |
386 | goto fail; | |
387 | } | |
388 | ||
396e343b | 389 | if (drv->ofdata_to_platdata && dev_has_of_node(dev)) { |
6494d708 SG |
390 | ret = drv->ofdata_to_platdata(dev); |
391 | if (ret) | |
392 | goto fail; | |
393 | } | |
394 | ||
f4fcba5c PT |
395 | /* Process 'assigned-{clocks/clock-parents/clock-rates}' properties */ |
396 | ret = clk_set_defaults(dev); | |
397 | if (ret) | |
398 | goto fail; | |
399 | ||
6494d708 SG |
400 | if (drv->probe) { |
401 | ret = drv->probe(dev); | |
02eeb1bb SG |
402 | if (ret) { |
403 | dev->flags &= ~DM_FLAG_ACTIVATED; | |
6494d708 | 404 | goto fail; |
02eeb1bb | 405 | } |
6494d708 SG |
406 | } |
407 | ||
6494d708 | 408 | ret = uclass_post_probe_device(dev); |
206d4d2b | 409 | if (ret) |
6494d708 | 410 | goto fail_uclass; |
6494d708 | 411 | |
c3ab9853 PF |
412 | if (dev->parent && device_get_uclass_id(dev) == UCLASS_PINCTRL) |
413 | pinctrl_select_state(dev, "default"); | |
414 | ||
6494d708 SG |
415 | return 0; |
416 | fail_uclass: | |
706865af | 417 | if (device_remove(dev, DM_REMOVE_NORMAL)) { |
6494d708 SG |
418 | dm_warn("%s: Device '%s' failed to remove on error path\n", |
419 | __func__, dev->name); | |
420 | } | |
421 | fail: | |
206d4d2b SG |
422 | dev->flags &= ~DM_FLAG_ACTIVATED; |
423 | ||
5a66a8ff | 424 | dev->seq = -1; |
6494d708 SG |
425 | device_free(dev); |
426 | ||
427 | return ret; | |
428 | } | |
429 | ||
54c5d08a | 430 | void *dev_get_platdata(struct udevice *dev) |
6494d708 SG |
431 | { |
432 | if (!dev) { | |
964d153c | 433 | dm_warn("%s: null device\n", __func__); |
6494d708 SG |
434 | return NULL; |
435 | } | |
436 | ||
437 | return dev->platdata; | |
438 | } | |
439 | ||
cdc133bd SG |
440 | void *dev_get_parent_platdata(struct udevice *dev) |
441 | { | |
442 | if (!dev) { | |
36d7cc17 | 443 | dm_warn("%s: null device\n", __func__); |
cdc133bd SG |
444 | return NULL; |
445 | } | |
446 | ||
447 | return dev->parent_platdata; | |
448 | } | |
449 | ||
5eaed880 PM |
450 | void *dev_get_uclass_platdata(struct udevice *dev) |
451 | { | |
452 | if (!dev) { | |
36d7cc17 | 453 | dm_warn("%s: null device\n", __func__); |
5eaed880 PM |
454 | return NULL; |
455 | } | |
456 | ||
457 | return dev->uclass_platdata; | |
458 | } | |
459 | ||
54c5d08a | 460 | void *dev_get_priv(struct udevice *dev) |
6494d708 SG |
461 | { |
462 | if (!dev) { | |
964d153c | 463 | dm_warn("%s: null device\n", __func__); |
6494d708 SG |
464 | return NULL; |
465 | } | |
466 | ||
467 | return dev->priv; | |
468 | } | |
997c87bb | 469 | |
e564f054 SG |
470 | void *dev_get_uclass_priv(struct udevice *dev) |
471 | { | |
472 | if (!dev) { | |
473 | dm_warn("%s: null device\n", __func__); | |
474 | return NULL; | |
475 | } | |
476 | ||
477 | return dev->uclass_priv; | |
478 | } | |
479 | ||
bcbe3d15 | 480 | void *dev_get_parent_priv(struct udevice *dev) |
e59f458d SG |
481 | { |
482 | if (!dev) { | |
964d153c | 483 | dm_warn("%s: null device\n", __func__); |
e59f458d SG |
484 | return NULL; |
485 | } | |
486 | ||
487 | return dev->parent_priv; | |
488 | } | |
489 | ||
997c87bb SG |
490 | static int device_get_device_tail(struct udevice *dev, int ret, |
491 | struct udevice **devp) | |
492 | { | |
493 | if (ret) | |
494 | return ret; | |
495 | ||
496 | ret = device_probe(dev); | |
497 | if (ret) | |
498 | return ret; | |
499 | ||
500 | *devp = dev; | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
505 | int device_get_child(struct udevice *parent, int index, struct udevice **devp) | |
506 | { | |
507 | struct udevice *dev; | |
508 | ||
509 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
510 | if (!index--) | |
511 | return device_get_device_tail(dev, 0, devp); | |
512 | } | |
513 | ||
514 | return -ENODEV; | |
515 | } | |
516 | ||
517 | int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq, | |
518 | bool find_req_seq, struct udevice **devp) | |
519 | { | |
520 | struct udevice *dev; | |
521 | ||
522 | *devp = NULL; | |
523 | if (seq_or_req_seq == -1) | |
524 | return -ENODEV; | |
525 | ||
526 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
527 | if ((find_req_seq ? dev->req_seq : dev->seq) == | |
528 | seq_or_req_seq) { | |
529 | *devp = dev; | |
530 | return 0; | |
531 | } | |
532 | } | |
533 | ||
534 | return -ENODEV; | |
535 | } | |
536 | ||
537 | int device_get_child_by_seq(struct udevice *parent, int seq, | |
538 | struct udevice **devp) | |
539 | { | |
540 | struct udevice *dev; | |
541 | int ret; | |
542 | ||
543 | *devp = NULL; | |
544 | ret = device_find_child_by_seq(parent, seq, false, &dev); | |
545 | if (ret == -ENODEV) { | |
546 | /* | |
547 | * We didn't find it in probed devices. See if there is one | |
548 | * that will request this seq if probed. | |
549 | */ | |
550 | ret = device_find_child_by_seq(parent, seq, true, &dev); | |
551 | } | |
552 | return device_get_device_tail(dev, ret, devp); | |
553 | } | |
554 | ||
555 | int device_find_child_by_of_offset(struct udevice *parent, int of_offset, | |
556 | struct udevice **devp) | |
557 | { | |
558 | struct udevice *dev; | |
559 | ||
560 | *devp = NULL; | |
561 | ||
562 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
e160f7d4 | 563 | if (dev_of_offset(dev) == of_offset) { |
997c87bb SG |
564 | *devp = dev; |
565 | return 0; | |
566 | } | |
567 | } | |
568 | ||
569 | return -ENODEV; | |
570 | } | |
571 | ||
132f9bfc | 572 | int device_get_child_by_of_offset(struct udevice *parent, int node, |
997c87bb SG |
573 | struct udevice **devp) |
574 | { | |
575 | struct udevice *dev; | |
576 | int ret; | |
577 | ||
578 | *devp = NULL; | |
132f9bfc | 579 | ret = device_find_child_by_of_offset(parent, node, &dev); |
997c87bb SG |
580 | return device_get_device_tail(dev, ret, devp); |
581 | } | |
a8981d4f | 582 | |
2693047a SG |
583 | static struct udevice *_device_find_global_by_of_offset(struct udevice *parent, |
584 | int of_offset) | |
585 | { | |
586 | struct udevice *dev, *found; | |
587 | ||
e160f7d4 | 588 | if (dev_of_offset(parent) == of_offset) |
2693047a SG |
589 | return parent; |
590 | ||
591 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
592 | found = _device_find_global_by_of_offset(dev, of_offset); | |
593 | if (found) | |
594 | return found; | |
595 | } | |
596 | ||
597 | return NULL; | |
598 | } | |
599 | ||
600 | int device_get_global_by_of_offset(int of_offset, struct udevice **devp) | |
601 | { | |
602 | struct udevice *dev; | |
603 | ||
604 | dev = _device_find_global_by_of_offset(gd->dm_root, of_offset); | |
605 | return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp); | |
606 | } | |
607 | ||
a8981d4f SG |
608 | int device_find_first_child(struct udevice *parent, struct udevice **devp) |
609 | { | |
610 | if (list_empty(&parent->child_head)) { | |
611 | *devp = NULL; | |
612 | } else { | |
613 | *devp = list_first_entry(&parent->child_head, struct udevice, | |
614 | sibling_node); | |
615 | } | |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
620 | int device_find_next_child(struct udevice **devp) | |
621 | { | |
622 | struct udevice *dev = *devp; | |
623 | struct udevice *parent = dev->parent; | |
624 | ||
625 | if (list_is_last(&dev->sibling_node, &parent->child_head)) { | |
626 | *devp = NULL; | |
627 | } else { | |
628 | *devp = list_entry(dev->sibling_node.next, struct udevice, | |
629 | sibling_node); | |
630 | } | |
631 | ||
632 | return 0; | |
633 | } | |
2ef249b4 | 634 | |
479728cb SG |
635 | struct udevice *dev_get_parent(struct udevice *child) |
636 | { | |
637 | return child->parent; | |
638 | } | |
639 | ||
39de8433 | 640 | ulong dev_get_driver_data(struct udevice *dev) |
2ef249b4 | 641 | { |
39de8433 | 642 | return dev->driver_data; |
2ef249b4 | 643 | } |
b3670531 | 644 | |
cc73d37b PM |
645 | const void *dev_get_driver_ops(struct udevice *dev) |
646 | { | |
647 | if (!dev || !dev->driver->ops) | |
648 | return NULL; | |
649 | ||
650 | return dev->driver->ops; | |
651 | } | |
652 | ||
b3670531 SG |
653 | enum uclass_id device_get_uclass_id(struct udevice *dev) |
654 | { | |
655 | return dev->uclass->uc_drv->id; | |
656 | } | |
c9cac3f8 | 657 | |
f9c370dc PM |
658 | const char *dev_get_uclass_name(struct udevice *dev) |
659 | { | |
660 | if (!dev) | |
661 | return NULL; | |
662 | ||
663 | return dev->uclass->uc_drv->name; | |
664 | } | |
665 | ||
c5785673 SG |
666 | bool device_has_children(struct udevice *dev) |
667 | { | |
668 | return !list_empty(&dev->child_head); | |
669 | } | |
670 | ||
671 | bool device_has_active_children(struct udevice *dev) | |
672 | { | |
673 | struct udevice *child; | |
674 | ||
675 | for (device_find_first_child(dev, &child); | |
676 | child; | |
677 | device_find_next_child(&child)) { | |
678 | if (device_active(child)) | |
679 | return true; | |
680 | } | |
681 | ||
682 | return false; | |
683 | } | |
684 | ||
685 | bool device_is_last_sibling(struct udevice *dev) | |
686 | { | |
687 | struct udevice *parent = dev->parent; | |
688 | ||
689 | if (!parent) | |
690 | return false; | |
691 | return list_is_last(&dev->sibling_node, &parent->child_head); | |
692 | } | |
f5c67ea0 | 693 | |
a2040fac SG |
694 | void device_set_name_alloced(struct udevice *dev) |
695 | { | |
fd1c2d9b | 696 | dev->flags |= DM_FLAG_NAME_ALLOCED; |
a2040fac SG |
697 | } |
698 | ||
f5c67ea0 SG |
699 | int device_set_name(struct udevice *dev, const char *name) |
700 | { | |
701 | name = strdup(name); | |
702 | if (!name) | |
703 | return -ENOMEM; | |
704 | dev->name = name; | |
a2040fac | 705 | device_set_name_alloced(dev); |
f5c67ea0 SG |
706 | |
707 | return 0; | |
708 | } | |
73443b9e | 709 | |
911f3aef | 710 | bool device_is_compatible(struct udevice *dev, const char *compat) |
73443b9e M |
711 | { |
712 | const void *fdt = gd->fdt_blob; | |
29d11b88 | 713 | ofnode node = dev_ofnode(dev); |
73443b9e | 714 | |
29d11b88 MS |
715 | if (ofnode_is_np(node)) |
716 | return of_device_is_compatible(ofnode_to_np(node), compat, NULL, NULL); | |
717 | else | |
718 | return !fdt_node_check_compatible(fdt, ofnode_to_offset(node), compat); | |
73443b9e M |
719 | } |
720 | ||
721 | bool of_machine_is_compatible(const char *compat) | |
722 | { | |
723 | const void *fdt = gd->fdt_blob; | |
724 | ||
725 | return !fdt_node_check_compatible(fdt, 0, compat); | |
726 | } |