[linux-2.6-block.git] / drivers / acpi / glue.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Link physical devices with ACPI devices support
 *
 * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
 * Copyright (c) 2005 Intel Corp.
 */

#include <linux/acpi_iort.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/rwsem.h>
#include <linux/acpi.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>

#include "internal.h"

#define ACPI_GLUE_DEBUG	0
#if ACPI_GLUE_DEBUG
#define DBG(fmt, ...)						\
	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
#else
#define DBG(fmt, ...)						\
do {								\
	if (0)							\
		printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__);	\
} while (0)
#endif
static LIST_HEAD(bus_type_list);
static DECLARE_RWSEM(bus_type_sem);

#define PHYSICAL_NODE_STRING "physical_node"
#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)

int register_acpi_bus_type(struct acpi_bus_type *type)
{
	if (acpi_disabled)
		return -ENODEV;
	if (type && type->match && type->find_companion) {
		down_write(&bus_type_sem);
		list_add_tail(&type->list, &bus_type_list);
		up_write(&bus_type_sem);
		printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
		return 0;
	}
	return -ENODEV;
}
EXPORT_SYMBOL_GPL(register_acpi_bus_type);

int unregister_acpi_bus_type(struct acpi_bus_type *type)
{
	if (acpi_disabled)
		return 0;
	if (type) {
		down_write(&bus_type_sem);
		list_del_init(&type->list);
		up_write(&bus_type_sem);
		printk(KERN_INFO PREFIX "bus type %s unregistered\n",
		       type->name);
		return 0;
	}
	return -ENODEV;
}
EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);

static struct acpi_bus_type *acpi_get_bus_type(struct device *dev)
{
	struct acpi_bus_type *tmp, *ret = NULL;

	down_read(&bus_type_sem);
	list_for_each_entry(tmp, &bus_type_list, list) {
		if (tmp->match(dev)) {
			ret = tmp;
			break;
		}
	}
	up_read(&bus_type_sem);
	return ret;
}

#define FIND_CHILD_MIN_SCORE	1
#define FIND_CHILD_MAX_SCORE	2

static int find_child_checks(struct acpi_device *adev, bool check_children)
{
	bool sta_present = true;
	unsigned long long sta;
	acpi_status status;

	status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
	if (status == AE_NOT_FOUND)
		sta_present = false;
	else if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
		return -ENODEV;

	if (check_children && list_empty(&adev->children))
		return -ENODEV;

	/*
	 * If the device has a _HID returning a valid ACPI/PNP device ID, it is
	 * better to make it look less attractive here, so that the other device
	 * with the same _ADR value (that may not have a valid device ID) can be
	 * matched going forward.  [This means a second spec violation in a row,
	 * so whatever we do here is best effort anyway.]
	 */
	return sta_present && !adev->pnp.type.platform_id ?
			FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
}

struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
					   u64 address, bool check_children)
{
	struct acpi_device *adev, *ret = NULL;
	int ret_score = 0;

	if (!parent)
		return NULL;

	list_for_each_entry(adev, &parent->children, node) {
		unsigned long long addr;
		acpi_status status;
		int score;

		status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
					       NULL, &addr);
		if (ACPI_FAILURE(status) || addr != address)
			continue;

		if (!ret) {
			/* This is the first matching object.  Save it. */
			ret = adev;
			continue;
		}
		/*
		 * There is more than one matching device object with the same
		 * _ADR value.  That really is unexpected, so we are kind of
		 * beyond the scope of the spec here.  We have to choose which
		 * one to return, though.
		 *
		 * First, check if the previously found object is good enough
		 * and return it if so.  Second, do the same for the object that
		 * we've just found.
		 */
		if (!ret_score) {
			ret_score = find_child_checks(ret, check_children);
			if (ret_score == FIND_CHILD_MAX_SCORE)
				return ret;
		}
		score = find_child_checks(adev, check_children);
		if (score == FIND_CHILD_MAX_SCORE) {
			return adev;
		} else if (score > ret_score) {
			ret = adev;
			ret_score = score;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(acpi_find_child_device);

static void acpi_physnode_link_name(char *buf, unsigned int node_id)
{
	if (node_id > 0)
		snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
			 PHYSICAL_NODE_STRING "%u", node_id);
	else
		strcpy(buf, PHYSICAL_NODE_STRING);
}

int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
{
	struct acpi_device_physical_node *physical_node, *pn;
	char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
	struct list_head *physnode_list;
	unsigned int node_id;
	int retval = -EINVAL;

	if (has_acpi_companion(dev)) {
		if (acpi_dev) {
			dev_warn(dev, "ACPI companion already set\n");
			return -EINVAL;
		} else {
			acpi_dev = ACPI_COMPANION(dev);
		}
	}
	if (!acpi_dev)
		return -EINVAL;

	get_device(&acpi_dev->dev);
	get_device(dev);
	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
	if (!physical_node) {
		retval = -ENOMEM;
		goto err;
	}

	mutex_lock(&acpi_dev->physical_node_lock);

	/*
	 * Keep the list sorted by node_id so that the IDs of removed nodes can
	 * be recycled easily.
	 */
	physnode_list = &acpi_dev->physical_node_list;
	node_id = 0;
	list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
		/* Sanity check. */
		if (pn->dev == dev) {
			mutex_unlock(&acpi_dev->physical_node_lock);

			dev_warn(dev, "Already associated with ACPI node\n");
			kfree(physical_node);
			if (ACPI_COMPANION(dev) != acpi_dev)
				goto err;

			put_device(dev);
			put_device(&acpi_dev->dev);
			return 0;
		}
		if (pn->node_id == node_id) {
			physnode_list = &pn->node;
			node_id++;
		}
	}

	physical_node->node_id = node_id;
	physical_node->dev = dev;
	list_add(&physical_node->node, physnode_list);
	acpi_dev->physical_node_count++;

	if (!has_acpi_companion(dev))
		ACPI_COMPANION_SET(dev, acpi_dev);

	acpi_physnode_link_name(physical_node_name, node_id);
	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
				   physical_node_name);
	if (retval)
		dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
			physical_node_name, retval);

	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
				   "firmware_node");
	if (retval)
		dev_err(dev, "Failed to create link firmware_node (%d)\n",
			retval);

	mutex_unlock(&acpi_dev->physical_node_lock);

	if (acpi_dev->wakeup.flags.valid)
		device_set_wakeup_capable(dev, true);

	return 0;

 err:
	ACPI_COMPANION_SET(dev, NULL);
	put_device(dev);
	put_device(&acpi_dev->dev);
	return retval;
}
EXPORT_SYMBOL_GPL(acpi_bind_one);

int acpi_unbind_one(struct device *dev)
{
	struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
	struct acpi_device_physical_node *entry;

	if (!acpi_dev)
		return 0;

	mutex_lock(&acpi_dev->physical_node_lock);

	list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
		if (entry->dev == dev) {
			char physnode_name[PHYSICAL_NODE_NAME_SIZE];

			list_del(&entry->node);
			acpi_dev->physical_node_count--;

			acpi_physnode_link_name(physnode_name, entry->node_id);
			sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
			sysfs_remove_link(&dev->kobj, "firmware_node");
			ACPI_COMPANION_SET(dev, NULL);
			/* Drop references taken by acpi_bind_one(). */
			put_device(dev);
			put_device(&acpi_dev->dev);
			kfree(entry);
			break;
		}

	mutex_unlock(&acpi_dev->physical_node_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(acpi_unbind_one);

static int acpi_device_notify(struct device *dev)
{
	struct acpi_bus_type *type = acpi_get_bus_type(dev);
	struct acpi_device *adev;
	int ret;

	ret = acpi_bind_one(dev, NULL);
	if (ret && type) {
		struct acpi_device *adev;

		adev = type->find_companion(dev);
		if (!adev) {
			DBG("Unable to get handle for %s\n", dev_name(dev));
			ret = -ENODEV;
			goto out;
		}
		ret = acpi_bind_one(dev, adev);
		if (ret)
			goto out;
	}
	adev = ACPI_COMPANION(dev);
	if (!adev)
		goto out;

	if (dev_is_platform(dev))
		acpi_configure_pmsi_domain(dev);

	if (type && type->setup)
		type->setup(dev);
	else if (adev->handler && adev->handler->bind)
		adev->handler->bind(dev);

 out:
#if ACPI_GLUE_DEBUG
	if (!ret) {
		struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };

		acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
		DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
		kfree(buffer.pointer);
	} else
		DBG("Device %s -> No ACPI support\n", dev_name(dev));
#endif

	return ret;
}

static int acpi_device_notify_remove(struct device *dev)
{
	struct acpi_device *adev = ACPI_COMPANION(dev);
	struct acpi_bus_type *type;

	if (!adev)
		return 0;

	type = acpi_get_bus_type(dev);
	if (type && type->cleanup)
		type->cleanup(dev);
	else if (adev->handler && adev->handler->unbind)
		adev->handler->unbind(dev);

	acpi_unbind_one(dev);
	return 0;
}

int acpi_platform_notify(struct device *dev, enum kobject_action action)
{
	switch (action) {
	case KOBJ_ADD:
		acpi_device_notify(dev);
		break;
	case KOBJ_REMOVE:
		acpi_device_notify_remove(dev);
		break;
	default:
		break;
	}
	return 0;
}
Commit	Line	Data
55716d26	1	// SPDX-License-Identifier: GPL-2.0-only
4e10d12a DSL	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.
4e10d12a	7	*/
d4f54a18 HG	8
d4f54a18 HG	9	#include <linux/acpi_iort.h>
214f2c90	10	#include <linux/export.h>
4e10d12a DSL	11	#include <linux/init.h>
	12	#include <linux/list.h>
	13	#include <linux/device.h>
5a0e3ad6	14	#include <linux/slab.h>
4e10d12a DSL	15	#include <linux/rwsem.h>
4e10d12a DSL	16	#include <linux/acpi.h>
d0562674	17	#include <linux/dma-mapping.h>
d4f54a18	18	#include <linux/platform_device.h>
4e10d12a	19
a192a958 LB	20	#include "internal.h"
a192a958 LB	21
4e10d12a DSL	22	#define ACPI_GLUE_DEBUG 0
4e10d12a DSL	23	#if ACPI_GLUE_DEBUG
23415eb5 JP	24	#define DBG(fmt, ...) \
23415eb5 JP	25	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
4e10d12a	26	#else
23415eb5 JP	27	#define DBG(fmt, ...) \
	28	do { \
	29	if (0) \
	30	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
	31	} while (0)
4e10d12a DSL	32	#endif
	33	static LIST_HEAD(bus_type_list);
	34	static DECLARE_RWSEM(bus_type_sem);
	35
1033f904	36	#define PHYSICAL_NODE_STRING "physical_node"
007ccfcf	37	#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
1033f904	38
4e10d12a DSL	39	int register_acpi_bus_type(struct acpi_bus_type *type)
	40	{
	41	if (acpi_disabled)
	42	return -ENODEV;
e3f02c52	43	if (type && type->match && type->find_companion) {
4e10d12a DSL	44	down_write(&bus_type_sem);
	45	list_add_tail(&type->list, &bus_type_list);
	46	up_write(&bus_type_sem);
53540098	47	printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
4e10d12a DSL	48	return 0;
	49	}
	50	return -ENODEV;
	51	}
91e4d5a1	52	EXPORT_SYMBOL_GPL(register_acpi_bus_type);
4e10d12a	53
4e10d12a DSL	54	int 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);
53540098 RW	62	printk(KERN_INFO PREFIX "bus type %s unregistered\n",
53540098 RW	63	type->name);
4e10d12a DSL	64	return 0;
	65	}
	66	return -ENODEV;
	67	}
91e4d5a1	68	EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
4e10d12a	69
53540098	70	static struct acpi_bus_type acpi_get_bus_type(struct device dev)
4e10d12a DSL	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) {
53540098	76	if (tmp->match(dev)) {
4e10d12a DSL	77	ret = tmp;
	78	break;
	79	}
	80	}
	81	up_read(&bus_type_sem);
	82	return ret;
	83	}
	84
11b88ee2 RW	85	#define FIND_CHILD_MIN_SCORE 1
	86	#define FIND_CHILD_MAX_SCORE 2
	87
d9fef0c4	88	static int find_child_checks(struct acpi_device *adev, bool check_children)
60f75b8e	89	{
11b88ee2	90	bool sta_present = true;
60f75b8e RW	91	unsigned long long sta;
	92	acpi_status status;
	93
d9fef0c4	94	status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
11b88ee2 RW	95	if (status == AE_NOT_FOUND)
	96	sta_present = false;
	97	else if (ACPI_FAILURE(status) \|\| !(sta & ACPI_STA_DEVICE_ENABLED))
	98	return -ENODEV;
60f75b8e	99
d9fef0c4 RW	100	if (check_children && list_empty(&adev->children))
d9fef0c4 RW	101	return -ENODEV;
60f75b8e	102
c2a6bbaf	103	/*
fdad4e7a RW	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.]
c2a6bbaf	109	*/
fdad4e7a	110	return sta_present && !adev->pnp.type.platform_id ?
c2a6bbaf	111	FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
60f75b8e RW	112	}
60f75b8e RW	113
d9fef0c4 RW	114	struct acpi_device acpi_find_child_device(struct acpi_device parent,
d9fef0c4 RW	115	u64 address, bool check_children)
60f75b8e	116	{
d9fef0c4 RW	117	struct acpi_device adev, ret = NULL;
	118	int ret_score = 0;
	119
5ce79d20 RW	120	if (!parent)
	121	return NULL;
	122
d9fef0c4 RW	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	}
4e10d12a	160	}
d9fef0c4	161	return ret;
4e10d12a	162	}
9c5ad36d	163	EXPORT_SYMBOL_GPL(acpi_find_child_device);
4e10d12a	164
bdbdbf91 RW	165	static 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
24dee1fc	174	int acpi_bind_one(struct device dev, struct acpi_device acpi_dev)
4e10d12a	175	{
f3fd0c8a	176	struct acpi_device_physical_node physical_node, pn;
007ccfcf RW	177	char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
	178	struct list_head *physnode_list;
	179	unsigned int node_id;
1033f904	180	int retval = -EINVAL;
4e10d12a	181
ca5b74d2	182	if (has_acpi_companion(dev)) {
24dee1fc	183	if (acpi_dev) {
7b199811	184	dev_warn(dev, "ACPI companion already set\n");
f3fd0c8a RW	185	return -EINVAL;
f3fd0c8a RW	186	} else {
7b199811	187	acpi_dev = ACPI_COMPANION(dev);
f3fd0c8a	188	}
4e10d12a	189	}
7b199811	190	if (!acpi_dev)
f3fd0c8a	191	return -EINVAL;
1033f904	192
a104b4d4	193	get_device(&acpi_dev->dev);
4e10d12a	194	get_device(dev);
f3fd0c8a	195	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
1033f904 LT	196	if (!physical_node) {
	197	retval = -ENOMEM;
	198	goto err;
4e10d12a	199	}
4e10d12a	200
1033f904	201	mutex_lock(&acpi_dev->physical_node_lock);
f3fd0c8a	202
007ccfcf RW	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. */
f3fd0c8a	211	if (pn->dev == dev) {
3342c753 RW	212	mutex_unlock(&acpi_dev->physical_node_lock);
3342c753 RW	213
f3fd0c8a	214	dev_warn(dev, "Already associated with ACPI node\n");
3342c753	215	kfree(physical_node);
7b199811	216	if (ACPI_COMPANION(dev) != acpi_dev)
3342c753	217	goto err;
3fe444ad	218
3342c753	219	put_device(dev);
a104b4d4	220	put_device(&acpi_dev->dev);
3342c753	221	return 0;
f3fd0c8a	222	}
007ccfcf RW	223	if (pn->node_id == node_id) {
	224	physnode_list = &pn->node;
	225	node_id++;
	226	}
1071695f DB	227	}
1071695f DB	228
007ccfcf	229	physical_node->node_id = node_id;
1033f904	230	physical_node->dev = dev;
007ccfcf	231	list_add(&physical_node->node, physnode_list);
1033f904	232	acpi_dev->physical_node_count++;
f3fd0c8a	233
ca5b74d2	234	if (!has_acpi_companion(dev))
7b199811	235	ACPI_COMPANION_SET(dev, acpi_dev);
1033f904	236
bdbdbf91	237	acpi_physnode_link_name(physical_node_name, node_id);
1033f904	238	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
f501b6ec	239	physical_node_name);
464c1147 RW	240	if (retval)
	241	dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
	242	physical_node_name, retval);
	243
1033f904	244	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
f501b6ec	245	"firmware_node");
464c1147 RW	246	if (retval)
	247	dev_err(dev, "Failed to create link firmware_node (%d)\n",
	248	retval);
1033f904	249
40055206 RW	250	mutex_unlock(&acpi_dev->physical_node_lock);
40055206 RW	251
1033f904 LT	252	if (acpi_dev->wakeup.flags.valid)
	253	device_set_wakeup_capable(dev, true);
	254
4e10d12a	255	return 0;
1033f904 LT	256
1033f904 LT	257	err:
7b199811	258	ACPI_COMPANION_SET(dev, NULL);
1033f904	259	put_device(dev);
a104b4d4	260	put_device(&acpi_dev->dev);
1033f904	261	return retval;
4e10d12a	262	}
ac212b69	263	EXPORT_SYMBOL_GPL(acpi_bind_one);
4e10d12a	264
ac212b69	265	int acpi_unbind_one(struct device *dev)
4e10d12a	266	{
7b199811	267	struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
1033f904	268	struct acpi_device_physical_node *entry;
1033f904	269
7b199811	270	if (!acpi_dev)
4e10d12a	271	return 0;
1071695f	272
1033f904	273	mutex_lock(&acpi_dev->physical_node_lock);
3e332783 RW	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");
7b199811	285	ACPI_COMPANION_SET(dev, NULL);
a104b4d4	286	/* Drop references taken by acpi_bind_one(). */
3e332783	287	put_device(dev);
a104b4d4	288	put_device(&acpi_dev->dev);
3e332783 RW	289	kfree(entry);
	290	break;
	291	}
	292
1033f904	293	mutex_unlock(&acpi_dev->physical_node_lock);
4e10d12a DSL	294	return 0;
4e10d12a DSL	295	}
ac212b69	296	EXPORT_SYMBOL_GPL(acpi_unbind_one);
4e10d12a	297
7847a145	298	static int acpi_device_notify(struct device *dev)
4e10d12a	299	{
53540098	300	struct acpi_bus_type *type = acpi_get_bus_type(dev);
9cb32acf	301	struct acpi_device *adev;
11909ca1	302	int ret;
4e10d12a	303
f3fd0c8a	304	ret = acpi_bind_one(dev, NULL);
92414481	305	if (ret && type) {
e3f02c52 RW	306	struct acpi_device *adev;
	307
	308	adev = type->find_companion(dev);
	309	if (!adev) {
11909ca1	310	DBG("Unable to get handle for %s\n", dev_name(dev));
e3f02c52	311	ret = -ENODEV;
11909ca1 RW	312	goto out;
11909ca1 RW	313	}
24dee1fc	314	ret = acpi_bind_one(dev, adev);
11909ca1 RW	315	if (ret)
11909ca1 RW	316	goto out;
4e10d12a	317	}
9cb32acf RW	318	adev = ACPI_COMPANION(dev);
	319	if (!adev)
	320	goto out;
11909ca1	321
719cf71c	322	if (dev_is_platform(dev))
d4f54a18 HG	323	acpi_configure_pmsi_domain(dev);
d4f54a18 HG	324
11909ca1 RW	325	if (type && type->setup)
11909ca1 RW	326	type->setup(dev);
9cb32acf RW	327	else if (adev->handler && adev->handler->bind)
9cb32acf RW	328	adev->handler->bind(dev);
4e10d12a	329
f3fd0c8a	330	out:
4e10d12a DSL	331	#if ACPI_GLUE_DEBUG
	332	if (!ret) {
	333	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	334
a412a11d	335	acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
db1461ad	336	DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
02438d87	337	kfree(buffer.pointer);
4e10d12a	338	} else
db1461ad	339	DBG("Device %s -> No ACPI support\n", dev_name(dev));
4e10d12a DSL	340	#endif
	341
	342	return ret;
	343	}
	344
7847a145	345	static int acpi_device_notify_remove(struct device *dev)
4e10d12a	346	{
9cb32acf	347	struct acpi_device *adev = ACPI_COMPANION(dev);
11909ca1 RW	348	struct acpi_bus_type *type;
11909ca1 RW	349
9cb32acf RW	350	if (!adev)
	351	return 0;
	352
53540098	353	type = acpi_get_bus_type(dev);
11909ca1 RW	354	if (type && type->cleanup)
11909ca1 RW	355	type->cleanup(dev);
9cb32acf RW	356	else if (adev->handler && adev->handler->unbind)
9cb32acf RW	357	adev->handler->unbind(dev);
11909ca1	358
4e10d12a DSL	359	acpi_unbind_one(dev);
	360	return 0;
	361	}
	362
7847a145	363	int acpi_platform_notify(struct device *dev, enum kobject_action action)
4e10d12a	364	{
7847a145 HK	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;
4e10d12a	374	}
7847a145	375	return 0;
4e10d12a	376	}