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c2efefb3 RW |
1 | /* |
2 | * drivers/acpi/device_sysfs.c - ACPI device sysfs attributes and modalias. | |
3 | * | |
4 | * Copyright (C) 2015, Intel Corp. | |
5 | * Author: Mika Westerberg <mika.westerberg@linux.intel.com> | |
6 | * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as published | |
12 | * by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
20 | */ | |
21 | ||
22 | #include <linux/acpi.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/export.h> | |
25 | #include <linux/nls.h> | |
26 | ||
27 | #include "internal.h" | |
28 | ||
263b4c1a RW |
29 | static ssize_t acpi_object_path(acpi_handle handle, char *buf) |
30 | { | |
31 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
32 | int result; | |
33 | ||
34 | result = acpi_get_name(handle, ACPI_FULL_PATHNAME, &path); | |
35 | if (result) | |
36 | return result; | |
37 | ||
a508d954 | 38 | result = sprintf(buf, "%s\n", (char *)path.pointer); |
263b4c1a RW |
39 | kfree(path.pointer); |
40 | return result; | |
41 | } | |
42 | ||
43 | struct acpi_data_node_attr { | |
44 | struct attribute attr; | |
45 | ssize_t (*show)(struct acpi_data_node *, char *); | |
46 | ssize_t (*store)(struct acpi_data_node *, const char *, size_t count); | |
47 | }; | |
48 | ||
49 | #define DATA_NODE_ATTR(_name) \ | |
50 | static struct acpi_data_node_attr data_node_##_name = \ | |
51 | __ATTR(_name, 0444, data_node_show_##_name, NULL) | |
52 | ||
53 | static ssize_t data_node_show_path(struct acpi_data_node *dn, char *buf) | |
54 | { | |
55 | return acpi_object_path(dn->handle, buf); | |
56 | } | |
57 | ||
58 | DATA_NODE_ATTR(path); | |
59 | ||
60 | static struct attribute *acpi_data_node_default_attrs[] = { | |
61 | &data_node_path.attr, | |
62 | NULL | |
63 | }; | |
64 | ||
65 | #define to_data_node(k) container_of(k, struct acpi_data_node, kobj) | |
66 | #define to_attr(a) container_of(a, struct acpi_data_node_attr, attr) | |
67 | ||
68 | static ssize_t acpi_data_node_attr_show(struct kobject *kobj, | |
69 | struct attribute *attr, char *buf) | |
70 | { | |
71 | struct acpi_data_node *dn = to_data_node(kobj); | |
72 | struct acpi_data_node_attr *dn_attr = to_attr(attr); | |
73 | ||
74 | return dn_attr->show ? dn_attr->show(dn, buf) : -ENXIO; | |
75 | } | |
76 | ||
77 | static const struct sysfs_ops acpi_data_node_sysfs_ops = { | |
78 | .show = acpi_data_node_attr_show, | |
79 | }; | |
80 | ||
81 | static void acpi_data_node_release(struct kobject *kobj) | |
82 | { | |
83 | struct acpi_data_node *dn = to_data_node(kobj); | |
84 | complete(&dn->kobj_done); | |
85 | } | |
86 | ||
87 | static struct kobj_type acpi_data_node_ktype = { | |
88 | .sysfs_ops = &acpi_data_node_sysfs_ops, | |
89 | .default_attrs = acpi_data_node_default_attrs, | |
90 | .release = acpi_data_node_release, | |
91 | }; | |
92 | ||
93 | static void acpi_expose_nondev_subnodes(struct kobject *kobj, | |
94 | struct acpi_device_data *data) | |
95 | { | |
96 | struct list_head *list = &data->subnodes; | |
97 | struct acpi_data_node *dn; | |
98 | ||
99 | if (list_empty(list)) | |
100 | return; | |
101 | ||
102 | list_for_each_entry(dn, list, sibling) { | |
103 | int ret; | |
104 | ||
105 | init_completion(&dn->kobj_done); | |
106 | ret = kobject_init_and_add(&dn->kobj, &acpi_data_node_ktype, | |
9db22d92 | 107 | kobj, "%s", dn->name); |
263b4c1a RW |
108 | if (ret) |
109 | acpi_handle_err(dn->handle, "Failed to expose (%d)\n", ret); | |
110 | else | |
111 | acpi_expose_nondev_subnodes(&dn->kobj, &dn->data); | |
112 | } | |
113 | } | |
114 | ||
115 | static void acpi_hide_nondev_subnodes(struct acpi_device_data *data) | |
116 | { | |
117 | struct list_head *list = &data->subnodes; | |
118 | struct acpi_data_node *dn; | |
119 | ||
120 | if (list_empty(list)) | |
121 | return; | |
122 | ||
123 | list_for_each_entry_reverse(dn, list, sibling) { | |
124 | acpi_hide_nondev_subnodes(&dn->data); | |
125 | kobject_put(&dn->kobj); | |
126 | } | |
127 | } | |
128 | ||
c2efefb3 RW |
129 | /** |
130 | * create_pnp_modalias - Create hid/cid(s) string for modalias and uevent | |
131 | * @acpi_dev: ACPI device object. | |
132 | * @modalias: Buffer to print into. | |
133 | * @size: Size of the buffer. | |
134 | * | |
135 | * Creates hid/cid(s) string needed for modalias and uevent | |
136 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
137 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
138 | * Return: 0: no _HID and no _CID | |
139 | * -EINVAL: output error | |
140 | * -ENOMEM: output is truncated | |
141 | */ | |
142 | static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias, | |
143 | int size) | |
144 | { | |
145 | int len; | |
146 | int count; | |
147 | struct acpi_hardware_id *id; | |
148 | ||
149 | /* | |
150 | * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should | |
151 | * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the | |
152 | * device's list. | |
153 | */ | |
154 | count = 0; | |
155 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) | |
156 | if (strcmp(id->id, ACPI_DT_NAMESPACE_HID)) | |
157 | count++; | |
158 | ||
159 | if (!count) | |
160 | return 0; | |
161 | ||
162 | len = snprintf(modalias, size, "acpi:"); | |
163 | if (len <= 0) | |
164 | return len; | |
165 | ||
166 | size -= len; | |
167 | ||
168 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { | |
169 | if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID)) | |
170 | continue; | |
171 | ||
172 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
173 | if (count < 0) | |
174 | return -EINVAL; | |
175 | ||
176 | if (count >= size) | |
177 | return -ENOMEM; | |
178 | ||
179 | len += count; | |
180 | size -= count; | |
181 | } | |
182 | modalias[len] = '\0'; | |
183 | return len; | |
184 | } | |
185 | ||
186 | /** | |
187 | * create_of_modalias - Creates DT compatible string for modalias and uevent | |
188 | * @acpi_dev: ACPI device object. | |
189 | * @modalias: Buffer to print into. | |
190 | * @size: Size of the buffer. | |
191 | * | |
192 | * Expose DT compatible modalias as of:NnameTCcompatible. This function should | |
193 | * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of | |
194 | * ACPI/PNP IDs. | |
195 | */ | |
196 | static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias, | |
197 | int size) | |
198 | { | |
199 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; | |
200 | const union acpi_object *of_compatible, *obj; | |
201 | int len, count; | |
202 | int i, nval; | |
203 | char *c; | |
204 | ||
205 | acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf); | |
206 | /* DT strings are all in lower case */ | |
207 | for (c = buf.pointer; *c != '\0'; c++) | |
208 | *c = tolower(*c); | |
209 | ||
210 | len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer); | |
211 | ACPI_FREE(buf.pointer); | |
212 | ||
213 | if (len <= 0) | |
214 | return len; | |
215 | ||
216 | of_compatible = acpi_dev->data.of_compatible; | |
217 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
218 | nval = of_compatible->package.count; | |
219 | obj = of_compatible->package.elements; | |
220 | } else { /* Must be ACPI_TYPE_STRING. */ | |
221 | nval = 1; | |
222 | obj = of_compatible; | |
223 | } | |
224 | for (i = 0; i < nval; i++, obj++) { | |
225 | count = snprintf(&modalias[len], size, "C%s", | |
226 | obj->string.pointer); | |
227 | if (count < 0) | |
228 | return -EINVAL; | |
229 | ||
230 | if (count >= size) | |
231 | return -ENOMEM; | |
232 | ||
233 | len += count; | |
234 | size -= count; | |
235 | } | |
236 | modalias[len] = '\0'; | |
237 | return len; | |
238 | } | |
239 | ||
240 | int __acpi_device_uevent_modalias(struct acpi_device *adev, | |
241 | struct kobj_uevent_env *env) | |
242 | { | |
243 | int len; | |
244 | ||
245 | if (!adev) | |
246 | return -ENODEV; | |
247 | ||
248 | if (list_empty(&adev->pnp.ids)) | |
249 | return 0; | |
250 | ||
251 | if (add_uevent_var(env, "MODALIAS=")) | |
252 | return -ENOMEM; | |
253 | ||
254 | len = create_pnp_modalias(adev, &env->buf[env->buflen - 1], | |
255 | sizeof(env->buf) - env->buflen); | |
256 | if (len < 0) | |
257 | return len; | |
258 | ||
259 | env->buflen += len; | |
260 | if (!adev->data.of_compatible) | |
261 | return 0; | |
262 | ||
263 | if (len > 0 && add_uevent_var(env, "MODALIAS=")) | |
264 | return -ENOMEM; | |
265 | ||
266 | len = create_of_modalias(adev, &env->buf[env->buflen - 1], | |
267 | sizeof(env->buf) - env->buflen); | |
268 | if (len < 0) | |
269 | return len; | |
270 | ||
271 | env->buflen += len; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | /** | |
277 | * acpi_device_uevent_modalias - uevent modalias for ACPI-enumerated devices. | |
278 | * | |
279 | * Create the uevent modalias field for ACPI-enumerated devices. | |
280 | * | |
281 | * Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with | |
282 | * hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001". | |
283 | */ | |
284 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) | |
285 | { | |
286 | return __acpi_device_uevent_modalias(acpi_companion_match(dev), env); | |
287 | } | |
288 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); | |
289 | ||
290 | static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size) | |
291 | { | |
292 | int len, count; | |
293 | ||
294 | if (!adev) | |
295 | return -ENODEV; | |
296 | ||
297 | if (list_empty(&adev->pnp.ids)) | |
298 | return 0; | |
299 | ||
300 | len = create_pnp_modalias(adev, buf, size - 1); | |
301 | if (len < 0) { | |
302 | return len; | |
303 | } else if (len > 0) { | |
304 | buf[len++] = '\n'; | |
305 | size -= len; | |
306 | } | |
307 | if (!adev->data.of_compatible) | |
308 | return len; | |
309 | ||
310 | count = create_of_modalias(adev, buf + len, size - 1); | |
311 | if (count < 0) { | |
312 | return count; | |
313 | } else if (count > 0) { | |
314 | len += count; | |
315 | buf[len++] = '\n'; | |
316 | } | |
317 | ||
318 | return len; | |
319 | } | |
320 | ||
321 | /** | |
322 | * acpi_device_modalias - modalias sysfs attribute for ACPI-enumerated devices. | |
323 | * | |
324 | * Create the modalias sysfs attribute for ACPI-enumerated devices. | |
325 | * | |
326 | * Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with | |
327 | * hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001". | |
328 | */ | |
329 | int acpi_device_modalias(struct device *dev, char *buf, int size) | |
330 | { | |
331 | return __acpi_device_modalias(acpi_companion_match(dev), buf, size); | |
332 | } | |
333 | EXPORT_SYMBOL_GPL(acpi_device_modalias); | |
334 | ||
335 | static ssize_t | |
a508d954 BD |
336 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
337 | { | |
c2efefb3 RW |
338 | return __acpi_device_modalias(to_acpi_device(dev), buf, 1024); |
339 | } | |
340 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
341 | ||
342 | static ssize_t real_power_state_show(struct device *dev, | |
343 | struct device_attribute *attr, char *buf) | |
344 | { | |
345 | struct acpi_device *adev = to_acpi_device(dev); | |
346 | int state; | |
347 | int ret; | |
348 | ||
349 | ret = acpi_device_get_power(adev, &state); | |
350 | if (ret) | |
351 | return ret; | |
352 | ||
353 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
354 | } | |
355 | ||
356 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); | |
357 | ||
358 | static ssize_t power_state_show(struct device *dev, | |
359 | struct device_attribute *attr, char *buf) | |
360 | { | |
361 | struct acpi_device *adev = to_acpi_device(dev); | |
362 | ||
363 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
364 | } | |
365 | ||
366 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); | |
367 | ||
368 | static ssize_t | |
369 | acpi_eject_store(struct device *d, struct device_attribute *attr, | |
370 | const char *buf, size_t count) | |
371 | { | |
372 | struct acpi_device *acpi_device = to_acpi_device(d); | |
373 | acpi_object_type not_used; | |
374 | acpi_status status; | |
375 | ||
376 | if (!count || buf[0] != '1') | |
377 | return -EINVAL; | |
378 | ||
379 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) | |
380 | && !acpi_device->driver) | |
381 | return -ENODEV; | |
382 | ||
383 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
384 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
385 | return -ENODEV; | |
386 | ||
387 | get_device(&acpi_device->dev); | |
388 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); | |
389 | if (ACPI_SUCCESS(status)) | |
390 | return count; | |
391 | ||
392 | put_device(&acpi_device->dev); | |
393 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, | |
394 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
395 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; | |
396 | } | |
397 | ||
398 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); | |
399 | ||
400 | static ssize_t | |
a508d954 BD |
401 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) |
402 | { | |
c2efefb3 RW |
403 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
404 | ||
405 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); | |
406 | } | |
407 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); | |
408 | ||
409 | static ssize_t acpi_device_uid_show(struct device *dev, | |
410 | struct device_attribute *attr, char *buf) | |
411 | { | |
412 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
413 | ||
414 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
415 | } | |
416 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
417 | ||
418 | static ssize_t acpi_device_adr_show(struct device *dev, | |
419 | struct device_attribute *attr, char *buf) | |
420 | { | |
421 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
422 | ||
423 | return sprintf(buf, "0x%08x\n", | |
424 | (unsigned int)(acpi_dev->pnp.bus_address)); | |
425 | } | |
426 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
427 | ||
263b4c1a RW |
428 | static ssize_t acpi_device_path_show(struct device *dev, |
429 | struct device_attribute *attr, char *buf) | |
430 | { | |
c2efefb3 | 431 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
c2efefb3 | 432 | |
263b4c1a | 433 | return acpi_object_path(acpi_dev->handle, buf); |
c2efefb3 RW |
434 | } |
435 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); | |
436 | ||
437 | /* sysfs file that shows description text from the ACPI _STR method */ | |
438 | static ssize_t description_show(struct device *dev, | |
439 | struct device_attribute *attr, | |
440 | char *buf) { | |
441 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
442 | int result; | |
443 | ||
444 | if (acpi_dev->pnp.str_obj == NULL) | |
445 | return 0; | |
446 | ||
447 | /* | |
448 | * The _STR object contains a Unicode identifier for a device. | |
449 | * We need to convert to utf-8 so it can be displayed. | |
450 | */ | |
451 | result = utf16s_to_utf8s( | |
452 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
453 | acpi_dev->pnp.str_obj->buffer.length, | |
454 | UTF16_LITTLE_ENDIAN, buf, | |
455 | PAGE_SIZE); | |
456 | ||
457 | buf[result++] = '\n'; | |
458 | ||
459 | return result; | |
460 | } | |
461 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
462 | ||
463 | static ssize_t | |
464 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
465 | char *buf) { | |
466 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
467 | acpi_status status; | |
468 | unsigned long long sun; | |
469 | ||
470 | status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun); | |
471 | if (ACPI_FAILURE(status)) | |
6c024409 | 472 | return -EIO; |
c2efefb3 RW |
473 | |
474 | return sprintf(buf, "%llu\n", sun); | |
475 | } | |
476 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
477 | ||
6283f97d BD |
478 | static ssize_t |
479 | acpi_device_hrv_show(struct device *dev, struct device_attribute *attr, | |
480 | char *buf) { | |
481 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
482 | acpi_status status; | |
483 | unsigned long long hrv; | |
484 | ||
485 | status = acpi_evaluate_integer(acpi_dev->handle, "_HRV", NULL, &hrv); | |
486 | if (ACPI_FAILURE(status)) | |
487 | return -EIO; | |
488 | ||
489 | return sprintf(buf, "%llu\n", hrv); | |
490 | } | |
491 | static DEVICE_ATTR(hrv, 0444, acpi_device_hrv_show, NULL); | |
492 | ||
c2efefb3 RW |
493 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
494 | char *buf) { | |
495 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
496 | acpi_status status; | |
497 | unsigned long long sta; | |
498 | ||
499 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); | |
500 | if (ACPI_FAILURE(status)) | |
6c024409 | 501 | return -EIO; |
c2efefb3 RW |
502 | |
503 | return sprintf(buf, "%llu\n", sta); | |
504 | } | |
505 | static DEVICE_ATTR_RO(status); | |
506 | ||
507 | /** | |
508 | * acpi_device_setup_files - Create sysfs attributes of an ACPI device. | |
509 | * @dev: ACPI device object. | |
510 | */ | |
511 | int acpi_device_setup_files(struct acpi_device *dev) | |
512 | { | |
513 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
514 | acpi_status status; | |
515 | int result = 0; | |
516 | ||
517 | /* | |
518 | * Devices gotten from FADT don't have a "path" attribute | |
519 | */ | |
520 | if (dev->handle) { | |
521 | result = device_create_file(&dev->dev, &dev_attr_path); | |
522 | if (result) | |
523 | goto end; | |
524 | } | |
525 | ||
526 | if (!list_empty(&dev->pnp.ids)) { | |
527 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
528 | if (result) | |
529 | goto end; | |
530 | ||
531 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
532 | if (result) | |
533 | goto end; | |
534 | } | |
535 | ||
536 | /* | |
537 | * If device has _STR, 'description' file is created | |
538 | */ | |
539 | if (acpi_has_method(dev->handle, "_STR")) { | |
540 | status = acpi_evaluate_object(dev->handle, "_STR", | |
541 | NULL, &buffer); | |
542 | if (ACPI_FAILURE(status)) | |
543 | buffer.pointer = NULL; | |
544 | dev->pnp.str_obj = buffer.pointer; | |
545 | result = device_create_file(&dev->dev, &dev_attr_description); | |
546 | if (result) | |
547 | goto end; | |
548 | } | |
549 | ||
550 | if (dev->pnp.type.bus_address) | |
551 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
552 | if (dev->pnp.unique_id) | |
553 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
554 | ||
555 | if (acpi_has_method(dev->handle, "_SUN")) { | |
556 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
557 | if (result) | |
558 | goto end; | |
559 | } | |
560 | ||
6283f97d BD |
561 | if (acpi_has_method(dev->handle, "_HRV")) { |
562 | result = device_create_file(&dev->dev, &dev_attr_hrv); | |
563 | if (result) | |
564 | goto end; | |
565 | } | |
566 | ||
c2efefb3 RW |
567 | if (acpi_has_method(dev->handle, "_STA")) { |
568 | result = device_create_file(&dev->dev, &dev_attr_status); | |
569 | if (result) | |
570 | goto end; | |
571 | } | |
572 | ||
a508d954 BD |
573 | /* |
574 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
575 | * hot-removal function from userland. | |
576 | */ | |
c2efefb3 RW |
577 | if (acpi_has_method(dev->handle, "_EJ0")) { |
578 | result = device_create_file(&dev->dev, &dev_attr_eject); | |
579 | if (result) | |
580 | return result; | |
581 | } | |
582 | ||
583 | if (dev->flags.power_manageable) { | |
584 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
585 | if (result) | |
586 | return result; | |
587 | ||
588 | if (dev->power.flags.power_resources) | |
589 | result = device_create_file(&dev->dev, | |
590 | &dev_attr_real_power_state); | |
591 | } | |
592 | ||
263b4c1a RW |
593 | acpi_expose_nondev_subnodes(&dev->dev.kobj, &dev->data); |
594 | ||
c2efefb3 RW |
595 | end: |
596 | return result; | |
597 | } | |
598 | ||
599 | /** | |
600 | * acpi_device_remove_files - Remove sysfs attributes of an ACPI device. | |
601 | * @dev: ACPI device object. | |
602 | */ | |
603 | void acpi_device_remove_files(struct acpi_device *dev) | |
604 | { | |
263b4c1a RW |
605 | acpi_hide_nondev_subnodes(&dev->data); |
606 | ||
c2efefb3 RW |
607 | if (dev->flags.power_manageable) { |
608 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
609 | if (dev->power.flags.power_resources) | |
610 | device_remove_file(&dev->dev, | |
611 | &dev_attr_real_power_state); | |
612 | } | |
613 | ||
614 | /* | |
615 | * If device has _STR, remove 'description' file | |
616 | */ | |
617 | if (acpi_has_method(dev->handle, "_STR")) { | |
618 | kfree(dev->pnp.str_obj); | |
619 | device_remove_file(&dev->dev, &dev_attr_description); | |
620 | } | |
621 | /* | |
622 | * If device has _EJ0, remove 'eject' file. | |
623 | */ | |
624 | if (acpi_has_method(dev->handle, "_EJ0")) | |
625 | device_remove_file(&dev->dev, &dev_attr_eject); | |
626 | ||
627 | if (acpi_has_method(dev->handle, "_SUN")) | |
628 | device_remove_file(&dev->dev, &dev_attr_sun); | |
629 | ||
6283f97d BD |
630 | if (acpi_has_method(dev->handle, "_HRV")) |
631 | device_remove_file(&dev->dev, &dev_attr_hrv); | |
632 | ||
c2efefb3 RW |
633 | if (dev->pnp.unique_id) |
634 | device_remove_file(&dev->dev, &dev_attr_uid); | |
635 | if (dev->pnp.type.bus_address) | |
636 | device_remove_file(&dev->dev, &dev_attr_adr); | |
637 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
638 | device_remove_file(&dev->dev, &dev_attr_hid); | |
639 | if (acpi_has_method(dev->handle, "_STA")) | |
640 | device_remove_file(&dev->dev, &dev_attr_status); | |
641 | if (dev->handle) | |
642 | device_remove_file(&dev->dev, &dev_attr_path); | |
643 | } |