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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
c2efefb3 RW |
2 | /* |
3 | * drivers/acpi/device_sysfs.c - ACPI device sysfs attributes and modalias. | |
4 | * | |
5 | * Copyright (C) 2015, Intel Corp. | |
6 | * Author: Mika Westerberg <mika.westerberg@linux.intel.com> | |
7 | * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
8 | * | |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
10 | * | |
c2efefb3 RW |
11 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
12 | */ | |
13 | ||
14 | #include <linux/acpi.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/export.h> | |
17 | #include <linux/nls.h> | |
18 | ||
19 | #include "internal.h" | |
20 | ||
263b4c1a RW |
21 | static ssize_t acpi_object_path(acpi_handle handle, char *buf) |
22 | { | |
23 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
24 | int result; | |
25 | ||
26 | result = acpi_get_name(handle, ACPI_FULL_PATHNAME, &path); | |
27 | if (result) | |
28 | return result; | |
29 | ||
a508d954 | 30 | result = sprintf(buf, "%s\n", (char *)path.pointer); |
263b4c1a RW |
31 | kfree(path.pointer); |
32 | return result; | |
33 | } | |
34 | ||
35 | struct acpi_data_node_attr { | |
36 | struct attribute attr; | |
37 | ssize_t (*show)(struct acpi_data_node *, char *); | |
38 | ssize_t (*store)(struct acpi_data_node *, const char *, size_t count); | |
39 | }; | |
40 | ||
41 | #define DATA_NODE_ATTR(_name) \ | |
42 | static struct acpi_data_node_attr data_node_##_name = \ | |
43 | __ATTR(_name, 0444, data_node_show_##_name, NULL) | |
44 | ||
45 | static ssize_t data_node_show_path(struct acpi_data_node *dn, char *buf) | |
46 | { | |
99db5ff7 | 47 | return dn->handle ? acpi_object_path(dn->handle, buf) : 0; |
263b4c1a RW |
48 | } |
49 | ||
50 | DATA_NODE_ATTR(path); | |
51 | ||
52 | static struct attribute *acpi_data_node_default_attrs[] = { | |
53 | &data_node_path.attr, | |
54 | NULL | |
55 | }; | |
56 | ||
57 | #define to_data_node(k) container_of(k, struct acpi_data_node, kobj) | |
58 | #define to_attr(a) container_of(a, struct acpi_data_node_attr, attr) | |
59 | ||
60 | static ssize_t acpi_data_node_attr_show(struct kobject *kobj, | |
61 | struct attribute *attr, char *buf) | |
62 | { | |
63 | struct acpi_data_node *dn = to_data_node(kobj); | |
64 | struct acpi_data_node_attr *dn_attr = to_attr(attr); | |
65 | ||
66 | return dn_attr->show ? dn_attr->show(dn, buf) : -ENXIO; | |
67 | } | |
68 | ||
69 | static const struct sysfs_ops acpi_data_node_sysfs_ops = { | |
70 | .show = acpi_data_node_attr_show, | |
71 | }; | |
72 | ||
73 | static void acpi_data_node_release(struct kobject *kobj) | |
74 | { | |
75 | struct acpi_data_node *dn = to_data_node(kobj); | |
76 | complete(&dn->kobj_done); | |
77 | } | |
78 | ||
79 | static struct kobj_type acpi_data_node_ktype = { | |
80 | .sysfs_ops = &acpi_data_node_sysfs_ops, | |
81 | .default_attrs = acpi_data_node_default_attrs, | |
82 | .release = acpi_data_node_release, | |
83 | }; | |
84 | ||
85 | static void acpi_expose_nondev_subnodes(struct kobject *kobj, | |
86 | struct acpi_device_data *data) | |
87 | { | |
88 | struct list_head *list = &data->subnodes; | |
89 | struct acpi_data_node *dn; | |
90 | ||
91 | if (list_empty(list)) | |
92 | return; | |
93 | ||
94 | list_for_each_entry(dn, list, sibling) { | |
95 | int ret; | |
96 | ||
97 | init_completion(&dn->kobj_done); | |
98 | ret = kobject_init_and_add(&dn->kobj, &acpi_data_node_ktype, | |
9db22d92 | 99 | kobj, "%s", dn->name); |
99db5ff7 | 100 | if (!ret) |
263b4c1a | 101 | acpi_expose_nondev_subnodes(&dn->kobj, &dn->data); |
99db5ff7 RW |
102 | else if (dn->handle) |
103 | acpi_handle_err(dn->handle, "Failed to expose (%d)\n", ret); | |
263b4c1a RW |
104 | } |
105 | } | |
106 | ||
107 | static void acpi_hide_nondev_subnodes(struct acpi_device_data *data) | |
108 | { | |
109 | struct list_head *list = &data->subnodes; | |
110 | struct acpi_data_node *dn; | |
111 | ||
112 | if (list_empty(list)) | |
113 | return; | |
114 | ||
115 | list_for_each_entry_reverse(dn, list, sibling) { | |
116 | acpi_hide_nondev_subnodes(&dn->data); | |
117 | kobject_put(&dn->kobj); | |
118 | } | |
119 | } | |
120 | ||
c2efefb3 RW |
121 | /** |
122 | * create_pnp_modalias - Create hid/cid(s) string for modalias and uevent | |
123 | * @acpi_dev: ACPI device object. | |
124 | * @modalias: Buffer to print into. | |
125 | * @size: Size of the buffer. | |
126 | * | |
127 | * Creates hid/cid(s) string needed for modalias and uevent | |
128 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
129 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
130 | * Return: 0: no _HID and no _CID | |
131 | * -EINVAL: output error | |
132 | * -ENOMEM: output is truncated | |
133 | */ | |
134 | static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias, | |
135 | int size) | |
136 | { | |
137 | int len; | |
138 | int count; | |
139 | struct acpi_hardware_id *id; | |
140 | ||
10809bb9 HG |
141 | /* Avoid unnecessarily loading modules for non present devices. */ |
142 | if (!acpi_device_is_present(acpi_dev)) | |
143 | return 0; | |
144 | ||
c2efefb3 RW |
145 | /* |
146 | * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should | |
147 | * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the | |
148 | * device's list. | |
149 | */ | |
150 | count = 0; | |
151 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) | |
152 | if (strcmp(id->id, ACPI_DT_NAMESPACE_HID)) | |
153 | count++; | |
154 | ||
155 | if (!count) | |
156 | return 0; | |
157 | ||
158 | len = snprintf(modalias, size, "acpi:"); | |
159 | if (len <= 0) | |
160 | return len; | |
161 | ||
162 | size -= len; | |
163 | ||
164 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { | |
165 | if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID)) | |
166 | continue; | |
167 | ||
168 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
169 | if (count < 0) | |
170 | return -EINVAL; | |
171 | ||
172 | if (count >= size) | |
173 | return -ENOMEM; | |
174 | ||
175 | len += count; | |
176 | size -= count; | |
177 | } | |
178 | modalias[len] = '\0'; | |
179 | return len; | |
180 | } | |
181 | ||
182 | /** | |
183 | * create_of_modalias - Creates DT compatible string for modalias and uevent | |
184 | * @acpi_dev: ACPI device object. | |
185 | * @modalias: Buffer to print into. | |
186 | * @size: Size of the buffer. | |
187 | * | |
188 | * Expose DT compatible modalias as of:NnameTCcompatible. This function should | |
189 | * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of | |
190 | * ACPI/PNP IDs. | |
191 | */ | |
192 | static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias, | |
193 | int size) | |
194 | { | |
195 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; | |
196 | const union acpi_object *of_compatible, *obj; | |
f16eb8a4 | 197 | acpi_status status; |
c2efefb3 RW |
198 | int len, count; |
199 | int i, nval; | |
200 | char *c; | |
201 | ||
f16eb8a4 AS |
202 | status = acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf); |
203 | if (ACPI_FAILURE(status)) | |
204 | return -ENODEV; | |
205 | ||
c2efefb3 RW |
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 | ||
36af2d5c KHF |
254 | if (adev->data.of_compatible) |
255 | len = create_of_modalias(adev, &env->buf[env->buflen - 1], | |
256 | sizeof(env->buf) - env->buflen); | |
257 | else | |
258 | len = create_pnp_modalias(adev, &env->buf[env->buflen - 1], | |
259 | sizeof(env->buf) - env->buflen); | |
c2efefb3 RW |
260 | if (len < 0) |
261 | return len; | |
262 | ||
263 | env->buflen += len; | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | /** | |
269 | * acpi_device_uevent_modalias - uevent modalias for ACPI-enumerated devices. | |
270 | * | |
271 | * Create the uevent modalias field for ACPI-enumerated devices. | |
272 | * | |
273 | * Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with | |
274 | * hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001". | |
275 | */ | |
276 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) | |
277 | { | |
278 | return __acpi_device_uevent_modalias(acpi_companion_match(dev), env); | |
279 | } | |
280 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); | |
281 | ||
282 | static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size) | |
283 | { | |
284 | int len, count; | |
285 | ||
286 | if (!adev) | |
287 | return -ENODEV; | |
288 | ||
289 | if (list_empty(&adev->pnp.ids)) | |
290 | return 0; | |
291 | ||
292 | len = create_pnp_modalias(adev, buf, size - 1); | |
293 | if (len < 0) { | |
294 | return len; | |
295 | } else if (len > 0) { | |
296 | buf[len++] = '\n'; | |
297 | size -= len; | |
298 | } | |
299 | if (!adev->data.of_compatible) | |
300 | return len; | |
301 | ||
302 | count = create_of_modalias(adev, buf + len, size - 1); | |
303 | if (count < 0) { | |
304 | return count; | |
305 | } else if (count > 0) { | |
306 | len += count; | |
307 | buf[len++] = '\n'; | |
308 | } | |
309 | ||
310 | return len; | |
311 | } | |
312 | ||
313 | /** | |
314 | * acpi_device_modalias - modalias sysfs attribute for ACPI-enumerated devices. | |
315 | * | |
316 | * Create the modalias sysfs attribute for ACPI-enumerated devices. | |
317 | * | |
318 | * Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with | |
319 | * hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001". | |
320 | */ | |
321 | int acpi_device_modalias(struct device *dev, char *buf, int size) | |
322 | { | |
323 | return __acpi_device_modalias(acpi_companion_match(dev), buf, size); | |
324 | } | |
325 | EXPORT_SYMBOL_GPL(acpi_device_modalias); | |
326 | ||
327 | static ssize_t | |
a508d954 BD |
328 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
329 | { | |
c2efefb3 RW |
330 | return __acpi_device_modalias(to_acpi_device(dev), buf, 1024); |
331 | } | |
332 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
333 | ||
334 | static ssize_t real_power_state_show(struct device *dev, | |
335 | struct device_attribute *attr, char *buf) | |
336 | { | |
337 | struct acpi_device *adev = to_acpi_device(dev); | |
338 | int state; | |
339 | int ret; | |
340 | ||
341 | ret = acpi_device_get_power(adev, &state); | |
342 | if (ret) | |
343 | return ret; | |
344 | ||
345 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); | |
346 | } | |
347 | ||
c828a892 | 348 | static DEVICE_ATTR_RO(real_power_state); |
c2efefb3 RW |
349 | |
350 | static ssize_t power_state_show(struct device *dev, | |
351 | struct device_attribute *attr, char *buf) | |
352 | { | |
353 | struct acpi_device *adev = to_acpi_device(dev); | |
354 | ||
355 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); | |
356 | } | |
357 | ||
c828a892 | 358 | static DEVICE_ATTR_RO(power_state); |
c2efefb3 RW |
359 | |
360 | static ssize_t | |
361 | acpi_eject_store(struct device *d, struct device_attribute *attr, | |
362 | const char *buf, size_t count) | |
363 | { | |
364 | struct acpi_device *acpi_device = to_acpi_device(d); | |
365 | acpi_object_type not_used; | |
366 | acpi_status status; | |
367 | ||
368 | if (!count || buf[0] != '1') | |
369 | return -EINVAL; | |
370 | ||
371 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) | |
372 | && !acpi_device->driver) | |
373 | return -ENODEV; | |
374 | ||
375 | status = acpi_get_type(acpi_device->handle, ¬_used); | |
376 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) | |
377 | return -ENODEV; | |
378 | ||
379 | get_device(&acpi_device->dev); | |
380 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); | |
381 | if (ACPI_SUCCESS(status)) | |
382 | return count; | |
383 | ||
384 | put_device(&acpi_device->dev); | |
385 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, | |
386 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); | |
387 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; | |
388 | } | |
389 | ||
390 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); | |
391 | ||
392 | static ssize_t | |
a508d954 BD |
393 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) |
394 | { | |
c2efefb3 RW |
395 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
396 | ||
397 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); | |
398 | } | |
399 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); | |
400 | ||
401 | static ssize_t acpi_device_uid_show(struct device *dev, | |
402 | struct device_attribute *attr, char *buf) | |
403 | { | |
404 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
405 | ||
406 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); | |
407 | } | |
408 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); | |
409 | ||
410 | static ssize_t acpi_device_adr_show(struct device *dev, | |
411 | struct device_attribute *attr, char *buf) | |
412 | { | |
413 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
414 | ||
ca6f998c PLB |
415 | if (acpi_dev->pnp.bus_address > U32_MAX) |
416 | return sprintf(buf, "0x%016llx\n", acpi_dev->pnp.bus_address); | |
417 | else | |
418 | return sprintf(buf, "0x%08llx\n", acpi_dev->pnp.bus_address); | |
c2efefb3 RW |
419 | } |
420 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); | |
421 | ||
263b4c1a RW |
422 | static ssize_t acpi_device_path_show(struct device *dev, |
423 | struct device_attribute *attr, char *buf) | |
424 | { | |
c2efefb3 | 425 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
c2efefb3 | 426 | |
263b4c1a | 427 | return acpi_object_path(acpi_dev->handle, buf); |
c2efefb3 RW |
428 | } |
429 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); | |
430 | ||
431 | /* sysfs file that shows description text from the ACPI _STR method */ | |
432 | static ssize_t description_show(struct device *dev, | |
433 | struct device_attribute *attr, | |
434 | char *buf) { | |
435 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
436 | int result; | |
437 | ||
438 | if (acpi_dev->pnp.str_obj == NULL) | |
439 | return 0; | |
440 | ||
441 | /* | |
442 | * The _STR object contains a Unicode identifier for a device. | |
443 | * We need to convert to utf-8 so it can be displayed. | |
444 | */ | |
445 | result = utf16s_to_utf8s( | |
446 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
447 | acpi_dev->pnp.str_obj->buffer.length, | |
448 | UTF16_LITTLE_ENDIAN, buf, | |
449 | PAGE_SIZE); | |
450 | ||
451 | buf[result++] = '\n'; | |
452 | ||
453 | return result; | |
454 | } | |
c828a892 | 455 | static DEVICE_ATTR_RO(description); |
c2efefb3 RW |
456 | |
457 | static ssize_t | |
458 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, | |
459 | char *buf) { | |
460 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
461 | acpi_status status; | |
462 | unsigned long long sun; | |
463 | ||
464 | status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun); | |
465 | if (ACPI_FAILURE(status)) | |
6c024409 | 466 | return -EIO; |
c2efefb3 RW |
467 | |
468 | return sprintf(buf, "%llu\n", sun); | |
469 | } | |
470 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); | |
471 | ||
6283f97d BD |
472 | static ssize_t |
473 | acpi_device_hrv_show(struct device *dev, struct device_attribute *attr, | |
474 | char *buf) { | |
475 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
476 | acpi_status status; | |
477 | unsigned long long hrv; | |
478 | ||
479 | status = acpi_evaluate_integer(acpi_dev->handle, "_HRV", NULL, &hrv); | |
480 | if (ACPI_FAILURE(status)) | |
481 | return -EIO; | |
482 | ||
483 | return sprintf(buf, "%llu\n", hrv); | |
484 | } | |
485 | static DEVICE_ATTR(hrv, 0444, acpi_device_hrv_show, NULL); | |
486 | ||
c2efefb3 RW |
487 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
488 | char *buf) { | |
489 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
490 | acpi_status status; | |
491 | unsigned long long sta; | |
492 | ||
493 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); | |
494 | if (ACPI_FAILURE(status)) | |
6c024409 | 495 | return -EIO; |
c2efefb3 RW |
496 | |
497 | return sprintf(buf, "%llu\n", sta); | |
498 | } | |
499 | static DEVICE_ATTR_RO(status); | |
500 | ||
501 | /** | |
502 | * acpi_device_setup_files - Create sysfs attributes of an ACPI device. | |
503 | * @dev: ACPI device object. | |
504 | */ | |
505 | int acpi_device_setup_files(struct acpi_device *dev) | |
506 | { | |
507 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
508 | acpi_status status; | |
509 | int result = 0; | |
510 | ||
511 | /* | |
512 | * Devices gotten from FADT don't have a "path" attribute | |
513 | */ | |
514 | if (dev->handle) { | |
515 | result = device_create_file(&dev->dev, &dev_attr_path); | |
516 | if (result) | |
517 | goto end; | |
518 | } | |
519 | ||
520 | if (!list_empty(&dev->pnp.ids)) { | |
521 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
522 | if (result) | |
523 | goto end; | |
524 | ||
525 | result = device_create_file(&dev->dev, &dev_attr_modalias); | |
526 | if (result) | |
527 | goto end; | |
528 | } | |
529 | ||
530 | /* | |
531 | * If device has _STR, 'description' file is created | |
532 | */ | |
533 | if (acpi_has_method(dev->handle, "_STR")) { | |
534 | status = acpi_evaluate_object(dev->handle, "_STR", | |
535 | NULL, &buffer); | |
536 | if (ACPI_FAILURE(status)) | |
537 | buffer.pointer = NULL; | |
538 | dev->pnp.str_obj = buffer.pointer; | |
539 | result = device_create_file(&dev->dev, &dev_attr_description); | |
540 | if (result) | |
541 | goto end; | |
542 | } | |
543 | ||
544 | if (dev->pnp.type.bus_address) | |
545 | result = device_create_file(&dev->dev, &dev_attr_adr); | |
546 | if (dev->pnp.unique_id) | |
547 | result = device_create_file(&dev->dev, &dev_attr_uid); | |
548 | ||
549 | if (acpi_has_method(dev->handle, "_SUN")) { | |
550 | result = device_create_file(&dev->dev, &dev_attr_sun); | |
551 | if (result) | |
552 | goto end; | |
553 | } | |
554 | ||
6283f97d BD |
555 | if (acpi_has_method(dev->handle, "_HRV")) { |
556 | result = device_create_file(&dev->dev, &dev_attr_hrv); | |
557 | if (result) | |
558 | goto end; | |
559 | } | |
560 | ||
c2efefb3 RW |
561 | if (acpi_has_method(dev->handle, "_STA")) { |
562 | result = device_create_file(&dev->dev, &dev_attr_status); | |
563 | if (result) | |
564 | goto end; | |
565 | } | |
566 | ||
a508d954 BD |
567 | /* |
568 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
569 | * hot-removal function from userland. | |
570 | */ | |
c2efefb3 RW |
571 | if (acpi_has_method(dev->handle, "_EJ0")) { |
572 | result = device_create_file(&dev->dev, &dev_attr_eject); | |
573 | if (result) | |
574 | return result; | |
575 | } | |
576 | ||
577 | if (dev->flags.power_manageable) { | |
578 | result = device_create_file(&dev->dev, &dev_attr_power_state); | |
579 | if (result) | |
580 | return result; | |
581 | ||
582 | if (dev->power.flags.power_resources) | |
583 | result = device_create_file(&dev->dev, | |
584 | &dev_attr_real_power_state); | |
585 | } | |
586 | ||
263b4c1a RW |
587 | acpi_expose_nondev_subnodes(&dev->dev.kobj, &dev->data); |
588 | ||
c2efefb3 RW |
589 | end: |
590 | return result; | |
591 | } | |
592 | ||
593 | /** | |
594 | * acpi_device_remove_files - Remove sysfs attributes of an ACPI device. | |
595 | * @dev: ACPI device object. | |
596 | */ | |
597 | void acpi_device_remove_files(struct acpi_device *dev) | |
598 | { | |
263b4c1a RW |
599 | acpi_hide_nondev_subnodes(&dev->data); |
600 | ||
c2efefb3 RW |
601 | if (dev->flags.power_manageable) { |
602 | device_remove_file(&dev->dev, &dev_attr_power_state); | |
603 | if (dev->power.flags.power_resources) | |
604 | device_remove_file(&dev->dev, | |
605 | &dev_attr_real_power_state); | |
606 | } | |
607 | ||
608 | /* | |
609 | * If device has _STR, remove 'description' file | |
610 | */ | |
611 | if (acpi_has_method(dev->handle, "_STR")) { | |
612 | kfree(dev->pnp.str_obj); | |
613 | device_remove_file(&dev->dev, &dev_attr_description); | |
614 | } | |
615 | /* | |
616 | * If device has _EJ0, remove 'eject' file. | |
617 | */ | |
618 | if (acpi_has_method(dev->handle, "_EJ0")) | |
619 | device_remove_file(&dev->dev, &dev_attr_eject); | |
620 | ||
621 | if (acpi_has_method(dev->handle, "_SUN")) | |
622 | device_remove_file(&dev->dev, &dev_attr_sun); | |
623 | ||
6283f97d BD |
624 | if (acpi_has_method(dev->handle, "_HRV")) |
625 | device_remove_file(&dev->dev, &dev_attr_hrv); | |
626 | ||
c2efefb3 RW |
627 | if (dev->pnp.unique_id) |
628 | device_remove_file(&dev->dev, &dev_attr_uid); | |
629 | if (dev->pnp.type.bus_address) | |
630 | device_remove_file(&dev->dev, &dev_attr_adr); | |
631 | device_remove_file(&dev->dev, &dev_attr_modalias); | |
632 | device_remove_file(&dev->dev, &dev_attr_hid); | |
633 | if (acpi_has_method(dev->handle, "_STA")) | |
634 | device_remove_file(&dev->dev, &dev_attr_status); | |
635 | if (dev->handle) | |
636 | device_remove_file(&dev->dev, &dev_attr_path); | |
637 | } |