blob: 5ea5dc219f563702e5bad7141832af2861e9144a [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. Wysocki11b88ee2013-09-09 23:07:47 +0200101 return sta_present ? FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
Rafael J. Wysocki33f767d2013-01-10 13:13:49 +0100102}
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200103
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100104struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
105 u64 address, bool check_children)
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200106{
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100107 struct acpi_device *adev, *ret = NULL;
108 int ret_score = 0;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200109
Rafael J. Wysocki5ce79d22013-11-28 23:58:08 +0100110 if (!parent)
111 return NULL;
112
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100113 list_for_each_entry(adev, &parent->children, node) {
114 unsigned long long addr;
115 acpi_status status;
116 int score;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200117
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100118 status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
119 NULL, &addr);
120 if (ACPI_FAILURE(status) || addr != address)
121 continue;
122
123 if (!ret) {
124 /* This is the first matching object. Save it. */
125 ret = adev;
126 continue;
127 }
128 /*
129 * There is more than one matching device object with the same
130 * _ADR value. That really is unexpected, so we are kind of
131 * beyond the scope of the spec here. We have to choose which
132 * one to return, though.
133 *
134 * First, check if the previously found object is good enough
135 * and return it if so. Second, do the same for the object that
136 * we've just found.
137 */
138 if (!ret_score) {
139 ret_score = find_child_checks(ret, check_children);
140 if (ret_score == FIND_CHILD_MAX_SCORE)
141 return ret;
142 }
143 score = find_child_checks(adev, check_children);
144 if (score == FIND_CHILD_MAX_SCORE) {
145 return adev;
146 } else if (score > ret_score) {
147 ret = adev;
148 ret_score = score;
149 }
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200150 }
Rafael J. Wysockid9fef0c2013-11-28 23:57:58 +0100151 return ret;
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200152}
Rafael J. Wysocki9c5ad362013-11-28 23:58:28 +0100153EXPORT_SYMBOL_GPL(acpi_find_child_device);
Rafael J. Wysocki60f75b82013-08-07 22:55:00 +0200154
Rafael J. Wysockibdbdbf92013-08-07 01:19:23 +0200155static void acpi_physnode_link_name(char *buf, unsigned int node_id)
156{
157 if (node_id > 0)
158 snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
159 PHYSICAL_NODE_STRING "%u", node_id);
160 else
161 strcpy(buf, PHYSICAL_NODE_STRING);
162}
163
Rafael J. Wysocki24dee1f2013-11-29 16:27:43 +0100164int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500165{
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100166 struct acpi_device_physical_node *physical_node, *pn;
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200167 char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
168 struct list_head *physnode_list;
169 unsigned int node_id;
Lan Tianyu1033f902012-08-17 14:44:09 +0800170 int retval = -EINVAL;
Suthikulpanit, Suravee1831eff2015-10-28 15:50:50 -0700171 enum dev_dma_attr attr;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500172
Rafael J. Wysockica5b74d2015-03-16 23:49:08 +0100173 if (has_acpi_companion(dev)) {
Rafael J. Wysocki24dee1f2013-11-29 16:27:43 +0100174 if (acpi_dev) {
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100175 dev_warn(dev, "ACPI companion already set\n");
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100176 return -EINVAL;
177 } else {
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100178 acpi_dev = ACPI_COMPANION(dev);
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100179 }
David Shaohua Li4e10d122005-03-18 18:45:35 -0500180 }
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100181 if (!acpi_dev)
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100182 return -EINVAL;
Lan Tianyu1033f902012-08-17 14:44:09 +0800183
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100184 get_device(&acpi_dev->dev);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500185 get_device(dev);
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100186 physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
Lan Tianyu1033f902012-08-17 14:44:09 +0800187 if (!physical_node) {
188 retval = -ENOMEM;
189 goto err;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500190 }
Lan Tianyu1033f902012-08-17 14:44:09 +0800191
192 mutex_lock(&acpi_dev->physical_node_lock);
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100193
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200194 /*
195 * Keep the list sorted by node_id so that the IDs of removed nodes can
196 * be recycled easily.
197 */
198 physnode_list = &acpi_dev->physical_node_list;
199 node_id = 0;
200 list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
201 /* Sanity check. */
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100202 if (pn->dev == dev) {
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200203 mutex_unlock(&acpi_dev->physical_node_lock);
Rafael J. Wysocki3fe444a2013-08-07 01:15:25 +0200204
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200205 dev_warn(dev, "Already associated with ACPI node\n");
206 kfree(physical_node);
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100207 if (ACPI_COMPANION(dev) != acpi_dev)
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200208 goto err;
209
210 put_device(dev);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100211 put_device(&acpi_dev->dev);
Rafael J. Wysocki3342c752013-08-08 16:19:10 +0200212 return 0;
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100213 }
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200214 if (pn->node_id == node_id) {
215 physnode_list = &pn->node;
216 node_id++;
217 }
Lan Tianyu1033f902012-08-17 14:44:09 +0800218 }
219
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200220 physical_node->node_id = node_id;
Lan Tianyu1033f902012-08-17 14:44:09 +0800221 physical_node->dev = dev;
Rafael J. Wysocki007ccfc2013-08-06 14:32:54 +0200222 list_add(&physical_node->node, physnode_list);
Lan Tianyu1033f902012-08-17 14:44:09 +0800223 acpi_dev->physical_node_count++;
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100224
Rafael J. Wysockica5b74d2015-03-16 23:49:08 +0100225 if (!has_acpi_companion(dev))
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100226 ACPI_COMPANION_SET(dev, acpi_dev);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500227
Suthikulpanit, Suravee1831eff2015-10-28 15:50:50 -0700228 attr = acpi_get_dma_attr(acpi_dev);
229 if (attr != DEV_DMA_NOT_SUPPORTED)
230 arch_setup_dma_ops(dev, 0, 0, NULL,
231 attr == DEV_DMA_COHERENT);
Suthikulpanit, Suraveed0562672015-06-10 11:08:52 -0500232
Rafael J. Wysockibdbdbf92013-08-07 01:19:23 +0200233 acpi_physnode_link_name(physical_node_name, node_id);
Lan Tianyu1033f902012-08-17 14:44:09 +0800234 retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
Rafael J. Wysockif501b6e2013-08-07 01:19:52 +0200235 physical_node_name);
Rafael J. Wysocki464c1142013-08-08 16:19:19 +0200236 if (retval)
237 dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
238 physical_node_name, retval);
239
Lan Tianyu1033f902012-08-17 14:44:09 +0800240 retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
Rafael J. Wysockif501b6e2013-08-07 01:19:52 +0200241 "firmware_node");
Rafael J. Wysocki464c1142013-08-08 16:19:19 +0200242 if (retval)
243 dev_err(dev, "Failed to create link firmware_node (%d)\n",
244 retval);
David Brownell10716952008-02-22 21:54:24 -0800245
Rafael J. Wysocki40055202013-08-07 01:19:37 +0200246 mutex_unlock(&acpi_dev->physical_node_lock);
247
Lan Tianyu1033f902012-08-17 14:44:09 +0800248 if (acpi_dev->wakeup.flags.valid)
249 device_set_wakeup_capable(dev, true);
David Brownell10716952008-02-22 21:54:24 -0800250
David Shaohua Li4e10d122005-03-18 18:45:35 -0500251 return 0;
Lan Tianyu1033f902012-08-17 14:44:09 +0800252
253 err:
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100254 ACPI_COMPANION_SET(dev, NULL);
Lan Tianyu1033f902012-08-17 14:44:09 +0800255 put_device(dev);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100256 put_device(&acpi_dev->dev);
Lan Tianyu1033f902012-08-17 14:44:09 +0800257 return retval;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500258}
Rafael J. Wysockiac212b62013-05-03 00:26:22 +0200259EXPORT_SYMBOL_GPL(acpi_bind_one);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500260
Rafael J. Wysockiac212b62013-05-03 00:26:22 +0200261int acpi_unbind_one(struct device *dev)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500262{
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100263 struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
Lan Tianyu1033f902012-08-17 14:44:09 +0800264 struct acpi_device_physical_node *entry;
Lan Tianyu1033f902012-08-17 14:44:09 +0800265
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100266 if (!acpi_dev)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500267 return 0;
David Brownell10716952008-02-22 21:54:24 -0800268
Lan Tianyu1033f902012-08-17 14:44:09 +0800269 mutex_lock(&acpi_dev->physical_node_lock);
David Brownell10716952008-02-22 21:54:24 -0800270
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200271 list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
272 if (entry->dev == dev) {
273 char physnode_name[PHYSICAL_NODE_NAME_SIZE];
Lan Tianyu1033f902012-08-17 14:44:09 +0800274
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200275 list_del(&entry->node);
276 acpi_dev->physical_node_count--;
Lan Tianyu1033f902012-08-17 14:44:09 +0800277
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200278 acpi_physnode_link_name(physnode_name, entry->node_id);
279 sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
280 sysfs_remove_link(&dev->kobj, "firmware_node");
Rafael J. Wysocki7b199812013-11-11 22:41:56 +0100281 ACPI_COMPANION_SET(dev, NULL);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100282 /* Drop references taken by acpi_bind_one(). */
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200283 put_device(dev);
Rafael J. Wysockia104b4d2013-11-14 23:18:32 +0100284 put_device(&acpi_dev->dev);
Rafael J. Wysocki3e332782013-08-07 01:22:08 +0200285 kfree(entry);
286 break;
287 }
288
Lan Tianyu1033f902012-08-17 14:44:09 +0800289 mutex_unlock(&acpi_dev->physical_node_lock);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500290 return 0;
291}
Rafael J. Wysockiac212b62013-05-03 00:26:22 +0200292EXPORT_SYMBOL_GPL(acpi_unbind_one);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500293
294static int acpi_platform_notify(struct device *dev)
295{
Rafael J. Wysocki53540092013-03-03 22:35:20 +0100296 struct acpi_bus_type *type = acpi_get_bus_type(dev);
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100297 struct acpi_device *adev;
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100298 int ret;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500299
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100300 ret = acpi_bind_one(dev, NULL);
Rafael J. Wysocki92414482013-03-03 22:35:44 +0100301 if (ret && type) {
Rafael J. Wysockie3f02c52013-11-29 16:27:34 +0100302 struct acpi_device *adev;
303
304 adev = type->find_companion(dev);
305 if (!adev) {
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100306 DBG("Unable to get handle for %s\n", dev_name(dev));
Rafael J. Wysockie3f02c52013-11-29 16:27:34 +0100307 ret = -ENODEV;
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100308 goto out;
309 }
Rafael J. Wysocki24dee1f2013-11-29 16:27:43 +0100310 ret = acpi_bind_one(dev, adev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100311 if (ret)
312 goto out;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500313 }
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100314 adev = ACPI_COMPANION(dev);
315 if (!adev)
316 goto out;
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100317
318 if (type && type->setup)
319 type->setup(dev);
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100320 else if (adev->handler && adev->handler->bind)
321 adev->handler->bind(dev);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500322
Rafael J. Wysockif3fd0c82012-11-21 00:21:39 +0100323 out:
David Shaohua Li4e10d122005-03-18 18:45:35 -0500324#if ACPI_GLUE_DEBUG
325 if (!ret) {
326 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
327
Yinghai Lua412a112013-01-12 14:00:06 +0100328 acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
Kay Sieversdb1461a2009-01-25 23:40:56 +0100329 DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
Len Brown02438d82006-06-30 03:19:10 -0400330 kfree(buffer.pointer);
David Shaohua Li4e10d122005-03-18 18:45:35 -0500331 } else
Kay Sieversdb1461a2009-01-25 23:40:56 +0100332 DBG("Device %s -> No ACPI support\n", dev_name(dev));
David Shaohua Li4e10d122005-03-18 18:45:35 -0500333#endif
334
335 return ret;
336}
337
338static int acpi_platform_notify_remove(struct device *dev)
339{
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100340 struct acpi_device *adev = ACPI_COMPANION(dev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100341 struct acpi_bus_type *type;
342
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100343 if (!adev)
344 return 0;
345
Rafael J. Wysocki53540092013-03-03 22:35:20 +0100346 type = acpi_get_bus_type(dev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100347 if (type && type->cleanup)
348 type->cleanup(dev);
Rafael J. Wysocki9cb32ac2014-02-11 00:35:46 +0100349 else if (adev->handler && adev->handler->unbind)
350 adev->handler->unbind(dev);
Rafael J. Wysocki11909ca2012-12-23 00:02:13 +0100351
David Shaohua Li4e10d122005-03-18 18:45:35 -0500352 acpi_unbind_one(dev);
353 return 0;
354}
355
Rami Rosenc33cab62015-09-10 23:48:09 +0300356void __init init_acpi_device_notify(void)
David Shaohua Li4e10d122005-03-18 18:45:35 -0500357{
David Shaohua Li4e10d122005-03-18 18:45:35 -0500358 if (platform_notify || platform_notify_remove) {
359 printk(KERN_ERR PREFIX "Can't use platform_notify\n");
Rami Rosenc33cab62015-09-10 23:48:09 +0300360 return;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500361 }
362 platform_notify = acpi_platform_notify;
363 platform_notify_remove = acpi_platform_notify_remove;
David Shaohua Li4e10d122005-03-18 18:45:35 -0500364}