blob: f06317d6fc38e7c20d5d255273deb7bea92289bc [file] [log] [blame]
David Shaohua Li4e10d122005-03-18 18:45:35 -05001/*
2 * Link physical devices with ACPI devices support
3 *
4 * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
5 * Copyright (c) 2005 Intel Corp.
6 *
7 * This file is released under the GPLv2.
8 */
Paul Gortmaker214f2c92011-10-26 16:22:14 -04009#include <linux/export.h>
David Shaohua Li4e10d122005-03-18 18:45:35 -050010#include <linux/init.h>
11#include <linux/list.h>
12#include <linux/device.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
David Shaohua Li4e10d122005-03-18 18:45:35 -050014#include <linux/rwsem.h>
15#include <linux/acpi.h>
Suthikulpanit, Suraveed0562672015-06-10 11:08:52 -050016#include <linux/dma-mapping.h>
David Shaohua Li4e10d122005-03-18 18:45:35 -050017
Len Browna192a952009-07-28 16:45:54 -040018#include "internal.h"
19
David Shaohua Li4e10d122005-03-18 18:45:35 -050020#define ACPI_GLUE_DEBUG 0
21#if ACPI_GLUE_DEBUG
Joe Perches23415eb2012-12-18 06:31:30 +000022#define DBG(fmt, ...) \
23 printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
David Shaohua Li4e10d122005-03-18 18:45:35 -050024#else
Joe Perches23415eb2012-12-18 06:31:30 +000025#define DBG(fmt, ...) \
26do { \
27 if (0) \
28 printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
29} while (0)
David Shaohua Li4e10d122005-03-18 18:45:35 -050030#endif
31static LIST_HEAD(bus_type_list);
32static DECLARE_RWSEM(bus_type_sem);
33
Lan Tianyu1033f902012-08-17 14:44:09 +080034#define PHYSICAL_NODE_STRING "physical_node"
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +020035#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
Lan Tianyu1033f902012-08-17 14:44:09 +080036
David Shaohua Li4e10d122005-03-18 18:45:35 -050037int register_acpi_bus_type(struct acpi_bus_type *type)
38{
39 if (acpi_disabled)
40 return -ENODEV;
Rafael J. Wysockie3f02c52013-11-29 16:27:34 +010041 if (type && type->match && type->find_companion) {
David Shaohua Li4e10d122005-03-18 18:45:35 -050042 down_write(&bus_type_sem);
43 list_add_tail(&type->list, &bus_type_list);
44 up_write(&bus_type_sem);
Rafael J. Wysocki53540092013-03-03 22:35:20 +010045 printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
David Shaohua Li4e10d122005-03-18 18:45:35 -050046 return 0;
47 }
48 return -ENODEV;
49}
Jeff Garzik91e4d5a2012-07-25 14:24:13 -040050EXPORT_SYMBOL_GPL(register_acpi_bus_type);
David Shaohua Li4e10d122005-03-18 18:45:35 -050051
David Shaohua Li4e10d122005-03-18 18:45:35 -050052int unregister_acpi_bus_type(struct acpi_bus_type *type)
53{
54 if (acpi_disabled)
55 return 0;
56 if (type) {
57 down_write(&bus_type_sem);
58 list_del_init(&type->list);
59 up_write(&bus_type_sem);
Rafael J. Wysocki53540092013-03-03 22:35:20 +010060 printk(KERN_INFO PREFIX "bus type %s unregistered\n",
61 type->name);
David Shaohua Li4e10d122005-03-18 18:45:35 -050062 return 0;
63 }
64 return -ENODEV;
65}
Jeff Garzik91e4d5a2012-07-25 14:24:13 -040066EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
David Shaohua Li4e10d122005-03-18 18:45:35 -050067
Rafael J. Wysocki53540092013-03-03 22:35:20 +010068static struct acpi_bus_type *acpi_get_bus_type(struct device *dev)
David Shaohua Li4e10d122005-03-18 18:45:35 -050069{
70 struct acpi_bus_type *tmp, *ret = NULL;
71
72 down_read(&bus_type_sem);
73 list_for_each_entry(tmp, &bus_type_list, list) {
Rafael J. Wysocki53540092013-03-03 22:35:20 +010074 if (tmp->match(dev)) {
David Shaohua Li4e10d122005-03-18 18:45:35 -050075 ret = tmp;
76 break;
77 }
78 }
79 up_read(&bus_type_sem);
80 return ret;
81}
82
Rafael J. Wysocki11b88ee2013-09-09 23:07:47 +020083#define FIND_CHILD_MIN_SCORE 1
84#define FIND_CHILD_MAX_SCORE 2
85
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +010086static int find_child_checks(struct acpi_device *adev, bool check_children)
David Shaohua Li4e10d122005-03-18 18:45:35 -050087{
Rafael J. Wysocki11b88ee2013-09-09 23:07:47 +020088 bool sta_present = true;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +020089 unsigned long long sta;
90 acpi_status status;
David Shaohua Li4e10d122005-03-18 18:45:35 -050091
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +010092 status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
Rafael J. Wysocki11b88ee2013-09-09 23:07:47 +020093 if (status == AE_NOT_FOUND)
94 sta_present = false;
95 else if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
96 return -ENODEV;
David Shaohua Li4e10d122005-03-18 18:45:35 -050097
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +010098 if (check_children && list_empty(&adev->children))
99 return -ENODEV;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200100
Rafael J. Wysockia15a3d92016-12-30 02:27:31 +0100101 /*
Rafael J. Wysocki3a53acc2016-12-30 02:27:31 +0100102 * If the device has a _HID returning a valid ACPI/PNP device ID, it is
103 * better to make it look less attractive here, so that the other device
104 * with the same _ADR value (that may not have a valid device ID) can be
105 * matched going forward. [This means a second spec violation in a row,
106 * so whatever we do here is best effort anyway.]
Rafael J. Wysockia15a3d92016-12-30 02:27:31 +0100107 */
Rafael J. Wysocki3a53acc2016-12-30 02:27:31 +0100108 return sta_present && !adev->pnp.type.platform_id ?
Rafael J. Wysockia15a3d92016-12-30 02:27:31 +0100109 FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
Rafael J. Wysocki33f767d2013-01-10 13:13:49 +0100110}
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200111
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100112struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
113 u64 address, bool check_children)
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200114{
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100115 struct acpi_device *adev, *ret = NULL;
116 int ret_score = 0;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200117
Rafael J. Wysocki5ce79d22013-11-28 23:58:08 +0100118 if (!parent)
119 return NULL;
120
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100121 list_for_each_entry(adev, &parent->children, node) {
122 unsigned long long addr;
123 acpi_status status;
124 int score;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200125
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100126 status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
127 NULL, &addr);
128 if (ACPI_FAILURE(status) || addr != address)
129 continue;
130
131 if (!ret) {
132 /* This is the first matching object. Save it. */
133 ret = adev;
134 continue;
135 }
136 /*
137 * There is more than one matching device object with the same
138 * _ADR value. That really is unexpected, so we are kind of
139 * beyond the scope of the spec here. We have to choose which
140 * one to return, though.
141 *
142 * First, check if the previously found object is good enough
143 * and return it if so. Second, do the same for the object that
144 * we've just found.
145 */
146 if (!ret_score) {
147 ret_score = find_child_checks(ret, check_children);
148 if (ret_score == FIND_CHILD_MAX_SCORE)
149 return ret;
150 }
151 score = find_child_checks(adev, check_children);
152 if (score == FIND_CHILD_MAX_SCORE) {
153 return adev;
154 } else if (score > ret_score) {
155 ret = adev;
156 ret_score = score;
157 }
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200158 }
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100159 return ret;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200160}
Rafael J. Wysocki9c5ad362013-11-28 23:58:28 +0100161EXPORT_SYMBOL_GPL(acpi_find_child_device);
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200162
Rafael J. Wysockibdbdbf92013-08-07 01:19:23 +0200163static void acpi_physnode_link_name(char *buf, unsigned int node_id)
164{
165 if (node_id > 0)
166 snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
167 PHYSICAL_NODE_STRING "%u", node_id);
168 else
169 strcpy(buf, PHYSICAL_NODE_STRING);
170}
171
Rafael J. Wysocki24dee1f2013-11-29 16:27:43 +0100172int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500173{
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100174 struct acpi_device_physical_node *physical_node, *pn;
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200175 char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
176 struct list_head *physnode_list;
177 unsigned int node_id;
Lan Tianyu1033f902012-08-17 14:44:09 +0800178 int retval = -EINVAL;
Suthikulpanit, Suravee1831eff2015-10-28 15:50:50 -0700179 enum dev_dma_attr attr;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500180
Rafael J. Wysockica5b74d2015-03-16 23:49:08 +0100181 if (has_acpi_companion(dev)) {
Rafael J. Wysocki24dee1f2013-11-29 16:27:43 +0100182 if (acpi_dev) {
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100183 dev_warn(dev, "ACPI companion already set\n");
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100184 return -EINVAL;
185 } else {
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100186 acpi_dev = ACPI_COMPANION(dev);
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100187 }
David Shaohua Li4e10d122005-03-18 18:45:35 -0500188 }
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100189 if (!acpi_dev)
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100190 return -EINVAL;
Lan Tianyu1033f902012-08-17 14:44:09 +0800191
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100192 get_device(&acpi_dev->dev);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500193 get_device(dev);
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100194 physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
Lan Tianyu1033f902012-08-17 14:44:09 +0800195 if (!physical_node) {
196 retval = -ENOMEM;
197 goto err;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500198 }
Lan Tianyu1033f902012-08-17 14:44:09 +0800199
200 mutex_lock(&acpi_dev->physical_node_lock);
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100201
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200202 /*
203 * Keep the list sorted by node_id so that the IDs of removed nodes can
204 * be recycled easily.
205 */
206 physnode_list = &acpi_dev->physical_node_list;
207 node_id = 0;
208 list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
209 /* Sanity check. */
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100210 if (pn->dev == dev) {
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200211 mutex_unlock(&acpi_dev->physical_node_lock);
Rafael J. Wysocki3fe444a2013-08-07 01:15:25 +0200212
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200213 dev_warn(dev, "Already associated with ACPI node\n");
214 kfree(physical_node);
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100215 if (ACPI_COMPANION(dev) != acpi_dev)
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200216 goto err;
217
218 put_device(dev);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100219 put_device(&acpi_dev->dev);
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200220 return 0;
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100221 }
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200222 if (pn->node_id == node_id) {
223 physnode_list = &pn->node;
224 node_id++;
225 }
Lan Tianyu1033f902012-08-17 14:44:09 +0800226 }
227
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200228 physical_node->node_id = node_id;
Lan Tianyu1033f902012-08-17 14:44:09 +0800229 physical_node->dev = dev;
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200230 list_add(&physical_node->node, physnode_list);
Lan Tianyu1033f902012-08-17 14:44:09 +0800231 acpi_dev->physical_node_count++;
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100232
Rafael J. Wysockica5b74d2015-03-16 23:49:08 +0100233 if (!has_acpi_companion(dev))
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100234 ACPI_COMPANION_SET(dev, acpi_dev);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500235
Suthikulpanit, Suravee1831eff2015-10-28 15:50:50 -0700236 attr = acpi_get_dma_attr(acpi_dev);
237 if (attr != DEV_DMA_NOT_SUPPORTED)
238 arch_setup_dma_ops(dev, 0, 0, NULL,
239 attr == DEV_DMA_COHERENT);
Suthikulpanit, Suraveed0562672015-06-10 11:08:52 -0500240
Rafael J. Wysockibdbdbf92013-08-07 01:19:23 +0200241 acpi_physnode_link_name(physical_node_name, node_id);
Lan Tianyu1033f902012-08-17 14:44:09 +0800242 retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
Rafael J. Wysockif501b6e2013-08-07 01:19:52 +0200243 physical_node_name);
Rafael J. Wysocki464c1142013-08-08 16:19:19 +0200244 if (retval)
245 dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
246 physical_node_name, retval);
247
Lan Tianyu1033f902012-08-17 14:44:09 +0800248 retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
Rafael J. Wysockif501b6e2013-08-07 01:19:52 +0200249 "firmware_node");
Rafael J. Wysocki464c1142013-08-08 16:19:19 +0200250 if (retval)
251 dev_err(dev, "Failed to create link firmware_node (%d)\n",
252 retval);
David Brownell10716952008-02-22 21:54:24 -0800253
Rafael J. Wysocki40055202013-08-07 01:19:37 +0200254 mutex_unlock(&acpi_dev->physical_node_lock);
255
Lan Tianyu1033f902012-08-17 14:44:09 +0800256 if (acpi_dev->wakeup.flags.valid)
257 device_set_wakeup_capable(dev, true);
David Brownell10716952008-02-22 21:54:24 -0800258
David Shaohua Li4e10d122005-03-18 18:45:35 -0500259 return 0;
Lan Tianyu1033f902012-08-17 14:44:09 +0800260
261 err:
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100262 ACPI_COMPANION_SET(dev, NULL);
Lan Tianyu1033f902012-08-17 14:44:09 +0800263 put_device(dev);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100264 put_device(&acpi_dev->dev);
Lan Tianyu1033f902012-08-17 14:44:09 +0800265 return retval;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500266}
Rafael J. Wysockiac212b62013-05-03 00:26:22 +0200267EXPORT_SYMBOL_GPL(acpi_bind_one);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500268
Rafael J. Wysockiac212b62013-05-03 00:26:22 +0200269int acpi_unbind_one(struct device *dev)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500270{
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100271 struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
Lan Tianyu1033f902012-08-17 14:44:09 +0800272 struct acpi_device_physical_node *entry;
Lan Tianyu1033f902012-08-17 14:44:09 +0800273
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100274 if (!acpi_dev)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500275 return 0;
David Brownell10716952008-02-22 21:54:24 -0800276
Lan Tianyu1033f902012-08-17 14:44:09 +0800277 mutex_lock(&acpi_dev->physical_node_lock);
David Brownell10716952008-02-22 21:54:24 -0800278
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200279 list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
280 if (entry->dev == dev) {
281 char physnode_name[PHYSICAL_NODE_NAME_SIZE];
Lan Tianyu1033f902012-08-17 14:44:09 +0800282
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200283 list_del(&entry->node);
284 acpi_dev->physical_node_count--;
Lan Tianyu1033f902012-08-17 14:44:09 +0800285
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200286 acpi_physnode_link_name(physnode_name, entry->node_id);
287 sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
288 sysfs_remove_link(&dev->kobj, "firmware_node");
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100289 ACPI_COMPANION_SET(dev, NULL);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100290 /* Drop references taken by acpi_bind_one(). */
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200291 put_device(dev);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100292 put_device(&acpi_dev->dev);
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200293 kfree(entry);
294 break;
295 }
296
Lan Tianyu1033f902012-08-17 14:44:09 +0800297 mutex_unlock(&acpi_dev->physical_node_lock);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500298 return 0;
299}
Rafael J. Wysockiac212b62013-05-03 00:26:22 +0200300EXPORT_SYMBOL_GPL(acpi_unbind_one);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500301
302static int acpi_platform_notify(struct device *dev)
303{
Rafael J. Wysocki53540092013-03-03 22:35:20 +0100304 struct acpi_bus_type *type = acpi_get_bus_type(dev);
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100305 struct acpi_device *adev;
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100306 int ret;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500307
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100308 ret = acpi_bind_one(dev, NULL);
Rafael J. Wysocki92414482013-03-03 22:35:44 +0100309 if (ret && type) {
Rafael J. Wysockie3f02c52013-11-29 16:27:34 +0100310 struct acpi_device *adev;
311
312 adev = type->find_companion(dev);
313 if (!adev) {
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100314 DBG("Unable to get handle for %s\n", dev_name(dev));
Rafael J. Wysockie3f02c52013-11-29 16:27:34 +0100315 ret = -ENODEV;
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100316 goto out;
317 }
Rafael J. Wysocki24dee1f2013-11-29 16:27:43 +0100318 ret = acpi_bind_one(dev, adev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100319 if (ret)
320 goto out;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500321 }
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100322 adev = ACPI_COMPANION(dev);
323 if (!adev)
324 goto out;
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100325
326 if (type && type->setup)
327 type->setup(dev);
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100328 else if (adev->handler && adev->handler->bind)
329 adev->handler->bind(dev);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500330
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100331 out:
David Shaohua Li4e10d122005-03-18 18:45:35 -0500332#if ACPI_GLUE_DEBUG
333 if (!ret) {
334 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
335
Yinghai Lua412a112013-01-12 14:00:06 +0100336 acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
Kay Sieversdb1461a2009-01-25 23:40:56 +0100337 DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
Len Brown02438d82006-06-30 03:19:10 -0400338 kfree(buffer.pointer);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500339 } else
Kay Sieversdb1461a2009-01-25 23:40:56 +0100340 DBG("Device %s -> No ACPI support\n", dev_name(dev));
David Shaohua Li4e10d122005-03-18 18:45:35 -0500341#endif
342
343 return ret;
344}
345
346static int acpi_platform_notify_remove(struct device *dev)
347{
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100348 struct acpi_device *adev = ACPI_COMPANION(dev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100349 struct acpi_bus_type *type;
350
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100351 if (!adev)
352 return 0;
353
Rafael J. Wysocki53540092013-03-03 22:35:20 +0100354 type = acpi_get_bus_type(dev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100355 if (type && type->cleanup)
356 type->cleanup(dev);
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100357 else if (adev->handler && adev->handler->unbind)
358 adev->handler->unbind(dev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100359
David Shaohua Li4e10d122005-03-18 18:45:35 -0500360 acpi_unbind_one(dev);
361 return 0;
362}
363
Rami Rosenc33cab62015-09-10 23:48:09 +0300364void __init init_acpi_device_notify(void)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500365{
David Shaohua Li4e10d122005-03-18 18:45:35 -0500366 if (platform_notify || platform_notify_remove) {
367 printk(KERN_ERR PREFIX "Can't use platform_notify\n");
Rami Rosenc33cab62015-09-10 23:48:09 +0300368 return;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500369 }
370 platform_notify = acpi_platform_notify;
371 platform_notify_remove = acpi_platform_notify_remove;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500372}