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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Link physical devices with ACPI devices support
4 *
5 * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
6 * Copyright (c) 2005 Intel Corp.
7 */
8
9#include <linux/acpi_iort.h>
10#include <linux/export.h>
11#include <linux/init.h>
12#include <linux/list.h>
13#include <linux/device.h>
14#include <linux/slab.h>
15#include <linux/rwsem.h>
16#include <linux/acpi.h>
17#include <linux/dma-mapping.h>
18#include <linux/platform_device.h>
19
20#include "internal.h"
21
22#define ACPI_GLUE_DEBUG 0
23#if ACPI_GLUE_DEBUG
24#define DBG(fmt, ...) \
25 printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
26#else
27#define DBG(fmt, ...) \
28do { \
29 if (0) \
30 printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
31} while (0)
32#endif
33static LIST_HEAD(bus_type_list);
34static DECLARE_RWSEM(bus_type_sem);
35
36#define PHYSICAL_NODE_STRING "physical_node"
37#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
38
39int register_acpi_bus_type(struct acpi_bus_type *type)
40{
41 if (acpi_disabled)
42 return -ENODEV;
43 if (type && type->match && type->find_companion) {
44 down_write(&bus_type_sem);
45 list_add_tail(&type->list, &bus_type_list);
46 up_write(&bus_type_sem);
47 printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
48 return 0;
49 }
50 return -ENODEV;
51}
52EXPORT_SYMBOL_GPL(register_acpi_bus_type);
53
54int unregister_acpi_bus_type(struct acpi_bus_type *type)
55{
56 if (acpi_disabled)
57 return 0;
58 if (type) {
59 down_write(&bus_type_sem);
60 list_del_init(&type->list);
61 up_write(&bus_type_sem);
62 printk(KERN_INFO PREFIX "bus type %s unregistered\n",
63 type->name);
64 return 0;
65 }
66 return -ENODEV;
67}
68EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
69
70static struct acpi_bus_type *acpi_get_bus_type(struct device *dev)
71{
72 struct acpi_bus_type *tmp, *ret = NULL;
73
74 down_read(&bus_type_sem);
75 list_for_each_entry(tmp, &bus_type_list, list) {
76 if (tmp->match(dev)) {
77 ret = tmp;
78 break;
79 }
80 }
81 up_read(&bus_type_sem);
82 return ret;
83}
84
85#define FIND_CHILD_MIN_SCORE 1
86#define FIND_CHILD_MAX_SCORE 2
87
88static int find_child_checks(struct acpi_device *adev, bool check_children)
89{
90 bool sta_present = true;
91 unsigned long long sta;
92 acpi_status status;
93
94 status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
95 if (status == AE_NOT_FOUND)
96 sta_present = false;
97 else if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
98 return -ENODEV;
99
100 if (check_children && list_empty(&adev->children))
101 return -ENODEV;
102
103 /*
104 * If the device has a _HID returning a valid ACPI/PNP device ID, it is
105 * better to make it look less attractive here, so that the other device
106 * with the same _ADR value (that may not have a valid device ID) can be
107 * matched going forward. [This means a second spec violation in a row,
108 * so whatever we do here is best effort anyway.]
109 */
110 return sta_present && !adev->pnp.type.platform_id ?
111 FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
112}
113
114struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
115 u64 address, bool check_children)
116{
117 struct acpi_device *adev, *ret = NULL;
118 int ret_score = 0;
119
120 if (!parent)
121 return NULL;
122
123 list_for_each_entry(adev, &parent->children, node) {
124 unsigned long long addr;
125 acpi_status status;
126 int score;
127
128 status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
129 NULL, &addr);
130 if (ACPI_FAILURE(status) || addr != address)
131 continue;
132
133 if (!ret) {
134 /* This is the first matching object. Save it. */
135 ret = adev;
136 continue;
137 }
138 /*
139 * There is more than one matching device object with the same
140 * _ADR value. That really is unexpected, so we are kind of
141 * beyond the scope of the spec here. We have to choose which
142 * one to return, though.
143 *
144 * First, check if the previously found object is good enough
145 * and return it if so. Second, do the same for the object that
146 * we've just found.
147 */
148 if (!ret_score) {
149 ret_score = find_child_checks(ret, check_children);
150 if (ret_score == FIND_CHILD_MAX_SCORE)
151 return ret;
152 }
153 score = find_child_checks(adev, check_children);
154 if (score == FIND_CHILD_MAX_SCORE) {
155 return adev;
156 } else if (score > ret_score) {
157 ret = adev;
158 ret_score = score;
159 }
160 }
161 return ret;
162}
163EXPORT_SYMBOL_GPL(acpi_find_child_device);
164
165static void acpi_physnode_link_name(char *buf, unsigned int node_id)
166{
167 if (node_id > 0)
168 snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
169 PHYSICAL_NODE_STRING "%u", node_id);
170 else
171 strcpy(buf, PHYSICAL_NODE_STRING);
172}
173
174int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
175{
176 struct acpi_device_physical_node *physical_node, *pn;
177 char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
178 struct list_head *physnode_list;
179 unsigned int node_id;
180 int retval = -EINVAL;
181
182 if (has_acpi_companion(dev)) {
183 if (acpi_dev) {
184 dev_warn(dev, "ACPI companion already set\n");
185 return -EINVAL;
186 } else {
187 acpi_dev = ACPI_COMPANION(dev);
188 }
189 }
190 if (!acpi_dev)
191 return -EINVAL;
192
193 get_device(&acpi_dev->dev);
194 get_device(dev);
195 physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
196 if (!physical_node) {
197 retval = -ENOMEM;
198 goto err;
199 }
200
201 mutex_lock(&acpi_dev->physical_node_lock);
202
203 /*
204 * Keep the list sorted by node_id so that the IDs of removed nodes can
205 * be recycled easily.
206 */
207 physnode_list = &acpi_dev->physical_node_list;
208 node_id = 0;
209 list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
210 /* Sanity check. */
211 if (pn->dev == dev) {
212 mutex_unlock(&acpi_dev->physical_node_lock);
213
214 dev_warn(dev, "Already associated with ACPI node\n");
215 kfree(physical_node);
216 if (ACPI_COMPANION(dev) != acpi_dev)
217 goto err;
218
219 put_device(dev);
220 put_device(&acpi_dev->dev);
221 return 0;
222 }
223 if (pn->node_id == node_id) {
224 physnode_list = &pn->node;
225 node_id++;
226 }
227 }
228
229 physical_node->node_id = node_id;
230 physical_node->dev = dev;
231 list_add(&physical_node->node, physnode_list);
232 acpi_dev->physical_node_count++;
233
234 if (!has_acpi_companion(dev))
235 ACPI_COMPANION_SET(dev, acpi_dev);
236
237 acpi_physnode_link_name(physical_node_name, node_id);
238 retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
239 physical_node_name);
240 if (retval)
241 dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
242 physical_node_name, retval);
243
244 retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
245 "firmware_node");
246 if (retval)
247 dev_err(dev, "Failed to create link firmware_node (%d)\n",
248 retval);
249
250 mutex_unlock(&acpi_dev->physical_node_lock);
251
252 if (acpi_dev->wakeup.flags.valid)
253 device_set_wakeup_capable(dev, true);
254
255 return 0;
256
257 err:
258 ACPI_COMPANION_SET(dev, NULL);
259 put_device(dev);
260 put_device(&acpi_dev->dev);
261 return retval;
262}
263EXPORT_SYMBOL_GPL(acpi_bind_one);
264
265int acpi_unbind_one(struct device *dev)
266{
267 struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
268 struct acpi_device_physical_node *entry;
269
270 if (!acpi_dev)
271 return 0;
272
273 mutex_lock(&acpi_dev->physical_node_lock);
274
275 list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
276 if (entry->dev == dev) {
277 char physnode_name[PHYSICAL_NODE_NAME_SIZE];
278
279 list_del(&entry->node);
280 acpi_dev->physical_node_count--;
281
282 acpi_physnode_link_name(physnode_name, entry->node_id);
283 sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
284 sysfs_remove_link(&dev->kobj, "firmware_node");
285 ACPI_COMPANION_SET(dev, NULL);
286 /* Drop references taken by acpi_bind_one(). */
287 put_device(dev);
288 put_device(&acpi_dev->dev);
289 kfree(entry);
290 break;
291 }
292
293 mutex_unlock(&acpi_dev->physical_node_lock);
294 return 0;
295}
296EXPORT_SYMBOL_GPL(acpi_unbind_one);
297
298static int acpi_device_notify(struct device *dev)
299{
300 struct acpi_bus_type *type = acpi_get_bus_type(dev);
301 struct acpi_device *adev;
302 int ret;
303
304 ret = acpi_bind_one(dev, NULL);
305 if (ret && type) {
306 struct acpi_device *adev;
307
308 adev = type->find_companion(dev);
309 if (!adev) {
310 DBG("Unable to get handle for %s\n", dev_name(dev));
311 ret = -ENODEV;
312 goto out;
313 }
314 ret = acpi_bind_one(dev, adev);
315 if (ret)
316 goto out;
317 }
318 adev = ACPI_COMPANION(dev);
319 if (!adev)
320 goto out;
321
322 if (dev_is_platform(dev))
323 acpi_configure_pmsi_domain(dev);
324
325 if (type && type->setup)
326 type->setup(dev);
327 else if (adev->handler && adev->handler->bind)
328 adev->handler->bind(dev);
329
330 out:
331#if ACPI_GLUE_DEBUG
332 if (!ret) {
333 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
334
335 acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
336 DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
337 kfree(buffer.pointer);
338 } else
339 DBG("Device %s -> No ACPI support\n", dev_name(dev));
340#endif
341
342 return ret;
343}
344
345static int acpi_device_notify_remove(struct device *dev)
346{
347 struct acpi_device *adev = ACPI_COMPANION(dev);
348 struct acpi_bus_type *type;
349
350 if (!adev)
351 return 0;
352
353 type = acpi_get_bus_type(dev);
354 if (type && type->cleanup)
355 type->cleanup(dev);
356 else if (adev->handler && adev->handler->unbind)
357 adev->handler->unbind(dev);
358
359 acpi_unbind_one(dev);
360 return 0;
361}
362
363int acpi_platform_notify(struct device *dev, enum kobject_action action)
364{
365 switch (action) {
366 case KOBJ_ADD:
367 acpi_device_notify(dev);
368 break;
369 case KOBJ_REMOVE:
370 acpi_device_notify_remove(dev);
371 break;
372 default:
373 break;
374 }
375 return 0;
376}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Link physical devices with ACPI devices support
4 *
5 * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
6 * Copyright (c) 2005 Intel Corp.
7 */
8
9#define pr_fmt(fmt) "ACPI: " fmt
10
11#include <linux/acpi_iort.h>
12#include <linux/export.h>
13#include <linux/init.h>
14#include <linux/list.h>
15#include <linux/device.h>
16#include <linux/slab.h>
17#include <linux/rwsem.h>
18#include <linux/acpi.h>
19#include <linux/dma-mapping.h>
20#include <linux/pci.h>
21#include <linux/pci-acpi.h>
22#include <linux/platform_device.h>
23
24#include "internal.h"
25
26static LIST_HEAD(bus_type_list);
27static DECLARE_RWSEM(bus_type_sem);
28
29#define PHYSICAL_NODE_STRING "physical_node"
30#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
31
32int register_acpi_bus_type(struct acpi_bus_type *type)
33{
34 if (acpi_disabled)
35 return -ENODEV;
36 if (type && type->match && type->find_companion) {
37 down_write(&bus_type_sem);
38 list_add_tail(&type->list, &bus_type_list);
39 up_write(&bus_type_sem);
40 pr_info("bus type %s registered\n", type->name);
41 return 0;
42 }
43 return -ENODEV;
44}
45EXPORT_SYMBOL_GPL(register_acpi_bus_type);
46
47int unregister_acpi_bus_type(struct acpi_bus_type *type)
48{
49 if (acpi_disabled)
50 return 0;
51 if (type) {
52 down_write(&bus_type_sem);
53 list_del_init(&type->list);
54 up_write(&bus_type_sem);
55 pr_info("bus type %s unregistered\n", type->name);
56 return 0;
57 }
58 return -ENODEV;
59}
60EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
61
62static struct acpi_bus_type *acpi_get_bus_type(struct device *dev)
63{
64 struct acpi_bus_type *tmp, *ret = NULL;
65
66 down_read(&bus_type_sem);
67 list_for_each_entry(tmp, &bus_type_list, list) {
68 if (tmp->match(dev)) {
69 ret = tmp;
70 break;
71 }
72 }
73 up_read(&bus_type_sem);
74 return ret;
75}
76
77#define FIND_CHILD_MIN_SCORE 1
78#define FIND_CHILD_MID_SCORE 2
79#define FIND_CHILD_MAX_SCORE 3
80
81static int match_any(struct acpi_device *adev, void *not_used)
82{
83 return 1;
84}
85
86static bool acpi_dev_has_children(struct acpi_device *adev)
87{
88 return acpi_dev_for_each_child(adev, match_any, NULL) > 0;
89}
90
91static int find_child_checks(struct acpi_device *adev, bool check_children)
92{
93 unsigned long long sta;
94 acpi_status status;
95
96 if (check_children && !acpi_dev_has_children(adev))
97 return -ENODEV;
98
99 status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
100 if (status == AE_NOT_FOUND) {
101 /*
102 * Special case: backlight device objects without _STA are
103 * preferred to other objects with the same _ADR value, because
104 * it is more likely that they are actually useful.
105 */
106 if (adev->pnp.type.backlight)
107 return FIND_CHILD_MID_SCORE;
108
109 return FIND_CHILD_MIN_SCORE;
110 }
111
112 if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
113 return -ENODEV;
114
115 /*
116 * If the device has a _HID returning a valid ACPI/PNP device ID, it is
117 * better to make it look less attractive here, so that the other device
118 * with the same _ADR value (that may not have a valid device ID) can be
119 * matched going forward. [This means a second spec violation in a row,
120 * so whatever we do here is best effort anyway.]
121 */
122 if (adev->pnp.type.platform_id)
123 return FIND_CHILD_MIN_SCORE;
124
125 return FIND_CHILD_MAX_SCORE;
126}
127
128struct find_child_walk_data {
129 struct acpi_device *adev;
130 u64 address;
131 int score;
132 bool check_sta;
133 bool check_children;
134};
135
136static int check_one_child(struct acpi_device *adev, void *data)
137{
138 struct find_child_walk_data *wd = data;
139 int score;
140
141 if (!adev->pnp.type.bus_address || acpi_device_adr(adev) != wd->address)
142 return 0;
143
144 if (!wd->adev) {
145 /*
146 * This is the first matching object, so save it. If it is not
147 * necessary to look for any other matching objects, stop the
148 * search.
149 */
150 wd->adev = adev;
151 return !(wd->check_sta || wd->check_children);
152 }
153
154 /*
155 * There is more than one matching device object with the same _ADR
156 * value. That really is unexpected, so we are kind of beyond the scope
157 * of the spec here. We have to choose which one to return, though.
158 *
159 * First, get the score for the previously found object and terminate
160 * the walk if it is maximum.
161 */
162 if (!wd->score) {
163 score = find_child_checks(wd->adev, wd->check_children);
164 if (score == FIND_CHILD_MAX_SCORE)
165 return 1;
166
167 wd->score = score;
168 }
169 /*
170 * Second, if the object that has just been found has a better score,
171 * replace the previously found one with it and terminate the walk if
172 * the new score is maximum.
173 */
174 score = find_child_checks(adev, wd->check_children);
175 if (score > wd->score) {
176 wd->adev = adev;
177 if (score == FIND_CHILD_MAX_SCORE)
178 return 1;
179
180 wd->score = score;
181 }
182
183 /* Continue, because there may be better matches. */
184 return 0;
185}
186
187static struct acpi_device *acpi_find_child(struct acpi_device *parent,
188 u64 address, bool check_children,
189 bool check_sta)
190{
191 struct find_child_walk_data wd = {
192 .address = address,
193 .check_children = check_children,
194 .check_sta = check_sta,
195 .adev = NULL,
196 .score = 0,
197 };
198
199 if (parent)
200 acpi_dev_for_each_child(parent, check_one_child, &wd);
201
202 return wd.adev;
203}
204
205struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
206 u64 address, bool check_children)
207{
208 return acpi_find_child(parent, address, check_children, true);
209}
210EXPORT_SYMBOL_GPL(acpi_find_child_device);
211
212struct acpi_device *acpi_find_child_by_adr(struct acpi_device *adev,
213 acpi_bus_address adr)
214{
215 return acpi_find_child(adev, adr, false, false);
216}
217EXPORT_SYMBOL_GPL(acpi_find_child_by_adr);
218
219static void acpi_physnode_link_name(char *buf, unsigned int node_id)
220{
221 if (node_id > 0)
222 snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
223 PHYSICAL_NODE_STRING "%u", node_id);
224 else
225 strcpy(buf, PHYSICAL_NODE_STRING);
226}
227
228int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
229{
230 struct acpi_device_physical_node *physical_node, *pn;
231 char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
232 struct list_head *physnode_list;
233 unsigned int node_id;
234 int retval = -EINVAL;
235
236 if (has_acpi_companion(dev)) {
237 if (acpi_dev) {
238 dev_warn(dev, "ACPI companion already set\n");
239 return -EINVAL;
240 } else {
241 acpi_dev = ACPI_COMPANION(dev);
242 }
243 }
244 if (!acpi_dev)
245 return -EINVAL;
246
247 acpi_dev_get(acpi_dev);
248 get_device(dev);
249 physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
250 if (!physical_node) {
251 retval = -ENOMEM;
252 goto err;
253 }
254
255 mutex_lock(&acpi_dev->physical_node_lock);
256
257 /*
258 * Keep the list sorted by node_id so that the IDs of removed nodes can
259 * be recycled easily.
260 */
261 physnode_list = &acpi_dev->physical_node_list;
262 node_id = 0;
263 list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
264 /* Sanity check. */
265 if (pn->dev == dev) {
266 mutex_unlock(&acpi_dev->physical_node_lock);
267
268 dev_warn(dev, "Already associated with ACPI node\n");
269 kfree(physical_node);
270 if (ACPI_COMPANION(dev) != acpi_dev)
271 goto err;
272
273 put_device(dev);
274 acpi_dev_put(acpi_dev);
275 return 0;
276 }
277 if (pn->node_id == node_id) {
278 physnode_list = &pn->node;
279 node_id++;
280 }
281 }
282
283 physical_node->node_id = node_id;
284 physical_node->dev = dev;
285 list_add(&physical_node->node, physnode_list);
286 acpi_dev->physical_node_count++;
287
288 if (!has_acpi_companion(dev))
289 ACPI_COMPANION_SET(dev, acpi_dev);
290
291 acpi_physnode_link_name(physical_node_name, node_id);
292 retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
293 physical_node_name);
294 if (retval)
295 dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
296 physical_node_name, retval);
297
298 retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
299 "firmware_node");
300 if (retval)
301 dev_err(dev, "Failed to create link firmware_node (%d)\n",
302 retval);
303
304 mutex_unlock(&acpi_dev->physical_node_lock);
305
306 if (acpi_dev->wakeup.flags.valid)
307 device_set_wakeup_capable(dev, true);
308
309 return 0;
310
311 err:
312 ACPI_COMPANION_SET(dev, NULL);
313 put_device(dev);
314 acpi_dev_put(acpi_dev);
315 return retval;
316}
317EXPORT_SYMBOL_GPL(acpi_bind_one);
318
319int acpi_unbind_one(struct device *dev)
320{
321 struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
322 struct acpi_device_physical_node *entry;
323
324 if (!acpi_dev)
325 return 0;
326
327 mutex_lock(&acpi_dev->physical_node_lock);
328
329 list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
330 if (entry->dev == dev) {
331 char physnode_name[PHYSICAL_NODE_NAME_SIZE];
332
333 list_del(&entry->node);
334 acpi_dev->physical_node_count--;
335
336 acpi_physnode_link_name(physnode_name, entry->node_id);
337 sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
338 sysfs_remove_link(&dev->kobj, "firmware_node");
339 ACPI_COMPANION_SET(dev, NULL);
340 /* Drop references taken by acpi_bind_one(). */
341 put_device(dev);
342 acpi_dev_put(acpi_dev);
343 kfree(entry);
344 break;
345 }
346
347 mutex_unlock(&acpi_dev->physical_node_lock);
348 return 0;
349}
350EXPORT_SYMBOL_GPL(acpi_unbind_one);
351
352void acpi_device_notify(struct device *dev)
353{
354 struct acpi_device *adev;
355 int ret;
356
357 ret = acpi_bind_one(dev, NULL);
358 if (ret) {
359 struct acpi_bus_type *type = acpi_get_bus_type(dev);
360
361 if (!type)
362 goto err;
363
364 adev = type->find_companion(dev);
365 if (!adev) {
366 dev_dbg(dev, "ACPI companion not found\n");
367 goto err;
368 }
369 ret = acpi_bind_one(dev, adev);
370 if (ret)
371 goto err;
372
373 if (type->setup) {
374 type->setup(dev);
375 goto done;
376 }
377 } else {
378 adev = ACPI_COMPANION(dev);
379
380 if (dev_is_pci(dev)) {
381 pci_acpi_setup(dev, adev);
382 goto done;
383 } else if (dev_is_platform(dev)) {
384 acpi_configure_pmsi_domain(dev);
385 }
386 }
387
388 if (adev->handler && adev->handler->bind)
389 adev->handler->bind(dev);
390
391done:
392 acpi_handle_debug(ACPI_HANDLE(dev), "Bound to device %s\n",
393 dev_name(dev));
394
395 return;
396
397err:
398 dev_dbg(dev, "No ACPI support\n");
399}
400
401void acpi_device_notify_remove(struct device *dev)
402{
403 struct acpi_device *adev = ACPI_COMPANION(dev);
404
405 if (!adev)
406 return;
407
408 if (dev_is_pci(dev))
409 pci_acpi_cleanup(dev, adev);
410 else if (adev->handler && adev->handler->unbind)
411 adev->handler->unbind(dev);
412
413 acpi_unbind_one(dev);
414}