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

/*
 * Link physical devices with ACPI devices support
 *
 * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
 * Copyright (c) 2005 Intel Corp.
 *
 * This file is released under the GPLv2.
 */
#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 "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;

	return sta_present ? 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;
	enum dev_dma_attr attr;

	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);

	attr = acpi_get_dma_attr(acpi_dev);
	if (attr != DEV_DMA_NOT_SUPPORTED)
		arch_setup_dma_ops(dev, 0, 0, NULL,
				   attr == DEV_DMA_COHERENT);

	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_platform_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 (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_platform_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;
}

void __init init_acpi_device_notify(void)
{
	if (platform_notify || platform_notify_remove) {
		printk(KERN_ERR PREFIX "Can't use platform_notify\n");
		return;
	}
	platform_notify = acpi_platform_notify;
	platform_notify_remove = acpi_platform_notify_remove;
}
Commit	Line	Data
4e10d12a DSL	1	/*
	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	*/
214f2c90	9	#include <linux/export.h>
4e10d12a DSL	10	#include <linux/init.h>
	11	#include <linux/list.h>
	12	#include <linux/device.h>
5a0e3ad6	13	#include <linux/slab.h>
4e10d12a DSL	14	#include <linux/rwsem.h>
4e10d12a DSL	15	#include <linux/acpi.h>
d0562674	16	#include <linux/dma-mapping.h>
4e10d12a	17
a192a958 LB	18	#include "internal.h"
a192a958 LB	19
4e10d12a DSL	20	#define ACPI_GLUE_DEBUG 0
4e10d12a DSL	21	#if ACPI_GLUE_DEBUG
23415eb5 JP	22	#define DBG(fmt, ...) \
23415eb5 JP	23	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
4e10d12a	24	#else
23415eb5 JP	25	#define DBG(fmt, ...) \
	26	do { \
	27	if (0) \
	28	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
	29	} while (0)
4e10d12a DSL	30	#endif
	31	static LIST_HEAD(bus_type_list);
	32	static DECLARE_RWSEM(bus_type_sem);
	33
1033f904	34	#define PHYSICAL_NODE_STRING "physical_node"
007ccfcf	35	#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
1033f904	36
4e10d12a DSL	37	int register_acpi_bus_type(struct acpi_bus_type *type)
	38	{
	39	if (acpi_disabled)
	40	return -ENODEV;
e3f02c52	41	if (type && type->match && type->find_companion) {
4e10d12a DSL	42	down_write(&bus_type_sem);
	43	list_add_tail(&type->list, &bus_type_list);
	44	up_write(&bus_type_sem);
53540098	45	printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
4e10d12a DSL	46	return 0;
	47	}
	48	return -ENODEV;
	49	}
91e4d5a1	50	EXPORT_SYMBOL_GPL(register_acpi_bus_type);
4e10d12a	51
4e10d12a DSL	52	int 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);
53540098 RW	60	printk(KERN_INFO PREFIX "bus type %s unregistered\n",
53540098 RW	61	type->name);
4e10d12a DSL	62	return 0;
	63	}
	64	return -ENODEV;
	65	}
91e4d5a1	66	EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
4e10d12a	67
53540098	68	static struct acpi_bus_type acpi_get_bus_type(struct device dev)
4e10d12a DSL	69	{
	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) {
53540098	74	if (tmp->match(dev)) {
4e10d12a DSL	75	ret = tmp;
	76	break;
	77	}
	78	}
	79	up_read(&bus_type_sem);
	80	return ret;
	81	}
	82
11b88ee2 RW	83	#define FIND_CHILD_MIN_SCORE 1
	84	#define FIND_CHILD_MAX_SCORE 2
	85
d9fef0c4	86	static int find_child_checks(struct acpi_device *adev, bool check_children)
60f75b8e	87	{
11b88ee2	88	bool sta_present = true;
60f75b8e RW	89	unsigned long long sta;
	90	acpi_status status;
	91
d9fef0c4	92	status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
11b88ee2 RW	93	if (status == AE_NOT_FOUND)
	94	sta_present = false;
	95	else if (ACPI_FAILURE(status) \|\| !(sta & ACPI_STA_DEVICE_ENABLED))
	96	return -ENODEV;
60f75b8e	97
d9fef0c4 RW	98	if (check_children && list_empty(&adev->children))
d9fef0c4 RW	99	return -ENODEV;
60f75b8e	100
11b88ee2	101	return sta_present ? FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
60f75b8e RW	102	}
60f75b8e RW	103
d9fef0c4 RW	104	struct acpi_device acpi_find_child_device(struct acpi_device parent,
d9fef0c4 RW	105	u64 address, bool check_children)
60f75b8e	106	{
d9fef0c4 RW	107	struct acpi_device adev, ret = NULL;
	108	int ret_score = 0;
	109
5ce79d20 RW	110	if (!parent)
	111	return NULL;
	112
d9fef0c4 RW	113	list_for_each_entry(adev, &parent->children, node) {
	114	unsigned long long addr;
	115	acpi_status status;
	116	int score;
	117
	118	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	}
4e10d12a	150	}
d9fef0c4	151	return ret;
4e10d12a	152	}
9c5ad36d	153	EXPORT_SYMBOL_GPL(acpi_find_child_device);
4e10d12a	154
bdbdbf91 RW	155	static 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
24dee1fc	164	int acpi_bind_one(struct device dev, struct acpi_device acpi_dev)
4e10d12a	165	{
f3fd0c8a	166	struct acpi_device_physical_node physical_node, pn;
007ccfcf RW	167	char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
	168	struct list_head *physnode_list;
	169	unsigned int node_id;
1033f904	170	int retval = -EINVAL;
1831eff8	171	enum dev_dma_attr attr;
4e10d12a	172
ca5b74d2	173	if (has_acpi_companion(dev)) {
24dee1fc	174	if (acpi_dev) {
7b199811	175	dev_warn(dev, "ACPI companion already set\n");
f3fd0c8a RW	176	return -EINVAL;
f3fd0c8a RW	177	} else {
7b199811	178	acpi_dev = ACPI_COMPANION(dev);
f3fd0c8a	179	}
4e10d12a	180	}
7b199811	181	if (!acpi_dev)
f3fd0c8a	182	return -EINVAL;
1033f904	183
a104b4d4	184	get_device(&acpi_dev->dev);
4e10d12a	185	get_device(dev);
f3fd0c8a	186	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
1033f904 LT	187	if (!physical_node) {
	188	retval = -ENOMEM;
	189	goto err;
4e10d12a	190	}
4e10d12a	191
1033f904	192	mutex_lock(&acpi_dev->physical_node_lock);
f3fd0c8a	193
007ccfcf RW	194	/*
	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. */
f3fd0c8a	202	if (pn->dev == dev) {
3342c753 RW	203	mutex_unlock(&acpi_dev->physical_node_lock);
3342c753 RW	204
f3fd0c8a	205	dev_warn(dev, "Already associated with ACPI node\n");
3342c753	206	kfree(physical_node);
7b199811	207	if (ACPI_COMPANION(dev) != acpi_dev)
3342c753	208	goto err;
3fe444ad	209
3342c753	210	put_device(dev);
a104b4d4	211	put_device(&acpi_dev->dev);
3342c753	212	return 0;
f3fd0c8a	213	}
007ccfcf RW	214	if (pn->node_id == node_id) {
	215	physnode_list = &pn->node;
	216	node_id++;
	217	}
1071695f DB	218	}
1071695f DB	219
007ccfcf	220	physical_node->node_id = node_id;
1033f904	221	physical_node->dev = dev;
007ccfcf	222	list_add(&physical_node->node, physnode_list);
1033f904	223	acpi_dev->physical_node_count++;
f3fd0c8a	224
ca5b74d2	225	if (!has_acpi_companion(dev))
7b199811	226	ACPI_COMPANION_SET(dev, acpi_dev);
1033f904	227
1831eff8 SS	228	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);
d0562674	232
bdbdbf91	233	acpi_physnode_link_name(physical_node_name, node_id);
1033f904	234	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
f501b6ec	235	physical_node_name);
464c1147 RW	236	if (retval)
	237	dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
	238	physical_node_name, retval);
	239
1033f904	240	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
f501b6ec	241	"firmware_node");
464c1147 RW	242	if (retval)
	243	dev_err(dev, "Failed to create link firmware_node (%d)\n",
	244	retval);
1033f904	245
40055206 RW	246	mutex_unlock(&acpi_dev->physical_node_lock);
40055206 RW	247
1033f904 LT	248	if (acpi_dev->wakeup.flags.valid)
	249	device_set_wakeup_capable(dev, true);
	250
4e10d12a	251	return 0;
1033f904 LT	252
1033f904 LT	253	err:
7b199811	254	ACPI_COMPANION_SET(dev, NULL);
1033f904	255	put_device(dev);
a104b4d4	256	put_device(&acpi_dev->dev);
1033f904	257	return retval;
4e10d12a	258	}
ac212b69	259	EXPORT_SYMBOL_GPL(acpi_bind_one);
4e10d12a	260
ac212b69	261	int acpi_unbind_one(struct device *dev)
4e10d12a	262	{
7b199811	263	struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
1033f904	264	struct acpi_device_physical_node *entry;
1033f904	265
7b199811	266	if (!acpi_dev)
4e10d12a	267	return 0;
1071695f	268
1033f904	269	mutex_lock(&acpi_dev->physical_node_lock);
3e332783 RW	270
	271	list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
	272	if (entry->dev == dev) {
	273	char physnode_name[PHYSICAL_NODE_NAME_SIZE];
	274
	275	list_del(&entry->node);
	276	acpi_dev->physical_node_count--;
	277
	278	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");
7b199811	281	ACPI_COMPANION_SET(dev, NULL);
a104b4d4	282	/* Drop references taken by acpi_bind_one(). */
3e332783	283	put_device(dev);
a104b4d4	284	put_device(&acpi_dev->dev);
3e332783 RW	285	kfree(entry);
	286	break;
	287	}
	288
1033f904	289	mutex_unlock(&acpi_dev->physical_node_lock);
4e10d12a DSL	290	return 0;
4e10d12a DSL	291	}
ac212b69	292	EXPORT_SYMBOL_GPL(acpi_unbind_one);
4e10d12a DSL	293
	294	static int acpi_platform_notify(struct device *dev)
	295	{
53540098	296	struct acpi_bus_type *type = acpi_get_bus_type(dev);
9cb32acf	297	struct acpi_device *adev;
11909ca1	298	int ret;
4e10d12a	299
f3fd0c8a	300	ret = acpi_bind_one(dev, NULL);
92414481	301	if (ret && type) {
e3f02c52 RW	302	struct acpi_device *adev;
	303
	304	adev = type->find_companion(dev);
	305	if (!adev) {
11909ca1	306	DBG("Unable to get handle for %s\n", dev_name(dev));
e3f02c52	307	ret = -ENODEV;
11909ca1 RW	308	goto out;
11909ca1 RW	309	}
24dee1fc	310	ret = acpi_bind_one(dev, adev);
11909ca1 RW	311	if (ret)
11909ca1 RW	312	goto out;
4e10d12a	313	}
9cb32acf RW	314	adev = ACPI_COMPANION(dev);
	315	if (!adev)
	316	goto out;
11909ca1 RW	317
	318	if (type && type->setup)
	319	type->setup(dev);
9cb32acf RW	320	else if (adev->handler && adev->handler->bind)
9cb32acf RW	321	adev->handler->bind(dev);
4e10d12a	322
f3fd0c8a	323	out:
4e10d12a DSL	324	#if ACPI_GLUE_DEBUG
	325	if (!ret) {
	326	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	327
a412a11d	328	acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
db1461ad	329	DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
02438d87	330	kfree(buffer.pointer);
4e10d12a	331	} else
db1461ad	332	DBG("Device %s -> No ACPI support\n", dev_name(dev));
4e10d12a DSL	333	#endif
	334
	335	return ret;
	336	}
	337
	338	static int acpi_platform_notify_remove(struct device *dev)
	339	{
9cb32acf	340	struct acpi_device *adev = ACPI_COMPANION(dev);
11909ca1 RW	341	struct acpi_bus_type *type;
11909ca1 RW	342
9cb32acf RW	343	if (!adev)
	344	return 0;
	345
53540098	346	type = acpi_get_bus_type(dev);
11909ca1 RW	347	if (type && type->cleanup)
11909ca1 RW	348	type->cleanup(dev);
9cb32acf RW	349	else if (adev->handler && adev->handler->unbind)
9cb32acf RW	350	adev->handler->unbind(dev);
11909ca1	351
4e10d12a DSL	352	acpi_unbind_one(dev);
	353	return 0;
	354	}
	355
c33cab60	356	void __init init_acpi_device_notify(void)
4e10d12a	357	{
4e10d12a DSL	358	if (platform_notify \|\| platform_notify_remove) {
4e10d12a DSL	359	printk(KERN_ERR PREFIX "Can't use platform_notify\n");
c33cab60	360	return;
4e10d12a DSL	361	}
	362	platform_notify = acpi_platform_notify;
	363	platform_notify_remove = acpi_platform_notify_remove;
4e10d12a	364	}