[deliverable/linux.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 "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_device) {
		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;
}

static acpi_status acpi_dev_present(acpi_handle handle, u32 lvl_not_used,
				  void *not_used, void **ret_p)
{
	struct acpi_device *adev = NULL;

	acpi_bus_get_device(handle, &adev);
	if (adev) {
		*ret_p = handle;
		return AE_CTRL_TERMINATE;
	}
	return AE_OK;
}

static bool acpi_extra_checks_passed(acpi_handle handle, bool is_bridge)
{
	unsigned long long sta;
	acpi_status status;

	status = acpi_bus_get_status_handle(handle, &sta);
	if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
		return false;

	if (is_bridge) {
		void *test = NULL;

		/* Check if this object has at least one child device. */
		acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
				    acpi_dev_present, NULL, NULL, &test);
		return !!test;
	}
	return true;
}

struct find_child_context {
	u64 addr;
	bool is_bridge;
	acpi_handle ret;
	bool ret_checked;
};

static acpi_status do_find_child(acpi_handle handle, u32 lvl_not_used,
				 void *data, void **not_used)
{
	struct find_child_context *context = data;
	unsigned long long addr;
	acpi_status status;

	status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &addr);
	if (ACPI_FAILURE(status) || addr != context->addr)
		return AE_OK;

	if (!context->ret) {
		/* This is the first matching object.  Save its handle. */
		context->ret = handle;
		return AE_OK;
	}
	/*
	 * There is more than one matching 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
	 * its handle if so.  Second, check the same for the object that we've
	 * just found.
	 */
	if (!context->ret_checked) {
		if (acpi_extra_checks_passed(context->ret, context->is_bridge))
			return AE_CTRL_TERMINATE;
		else
			context->ret_checked = true;
	}
	if (acpi_extra_checks_passed(handle, context->is_bridge)) {
		context->ret = handle;
		return AE_CTRL_TERMINATE;
	}
	return AE_OK;
}

acpi_handle acpi_find_child(acpi_handle parent, u64 addr, bool is_bridge)
{
	if (parent) {
		struct find_child_context context = {
			.addr = addr,
			.is_bridge = is_bridge,
		};

		acpi_walk_namespace(ACPI_TYPE_DEVICE, parent, 1, do_find_child,
				    NULL, &context, NULL);
		return context.ret;
	}
	return NULL;
}
EXPORT_SYMBOL_GPL(acpi_find_child);

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, acpi_handle handle)
{
	struct acpi_device *acpi_dev;
	acpi_status status;
	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 (ACPI_HANDLE(dev)) {
		if (handle) {
			dev_warn(dev, "ACPI handle is already set\n");
			return -EINVAL;
		} else {
			handle = ACPI_HANDLE(dev);
		}
	}
	if (!handle)
		return -EINVAL;

	get_device(dev);
	status = acpi_bus_get_device(handle, &acpi_dev);
	if (ACPI_FAILURE(status))
		goto err;

	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_HANDLE(dev) != handle)
				goto err;

			put_device(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 (!ACPI_HANDLE(dev))
		ACPI_HANDLE_SET(dev, acpi_dev->handle);

	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_HANDLE_SET(dev, NULL);
	put_device(dev);
	return retval;
}
EXPORT_SYMBOL_GPL(acpi_bind_one);

int acpi_unbind_one(struct device *dev)
{
	struct acpi_device_physical_node *entry;
	struct acpi_device *acpi_dev;
	acpi_status status;

	if (!ACPI_HANDLE(dev))
		return 0;

	status = acpi_bus_get_device(ACPI_HANDLE(dev), &acpi_dev);
	if (ACPI_FAILURE(status)) {
		dev_err(dev, "Oops, ACPI handle corrupt in %s()\n", __func__);
		return -EINVAL;
	}

	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_HANDLE_SET(dev, NULL);
			/* acpi_bind_one() increase refcnt by one. */
			put_device(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);
	acpi_handle handle;
	int ret;

	ret = acpi_bind_one(dev, NULL);
	if (ret && type) {
		ret = type->find_device(dev, &handle);
		if (ret) {
			DBG("Unable to get handle for %s\n", dev_name(dev));
			goto out;
		}
		ret = acpi_bind_one(dev, handle);
		if (ret)
			goto out;
	}

	if (type && type->setup)
		type->setup(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_bus_type *type;

	type = acpi_get_bus_type(dev);
	if (type && type->cleanup)
		type->cleanup(dev);

	acpi_unbind_one(dev);
	return 0;
}

int __init init_acpi_device_notify(void)
{
	if (platform_notify || platform_notify_remove) {
		printk(KERN_ERR PREFIX "Can't use platform_notify\n");
		return 0;
	}
	platform_notify = acpi_platform_notify;
	platform_notify_remove = acpi_platform_notify_remove;
	return 0;
}
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>
	15	#include <linux/acpi.h>
	16
a192a958 LB	17	#include "internal.h"
a192a958 LB	18
4e10d12a DSL	19	#define ACPI_GLUE_DEBUG 0
4e10d12a DSL	20	#if ACPI_GLUE_DEBUG
23415eb5 JP	21	#define DBG(fmt, ...) \
23415eb5 JP	22	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
4e10d12a	23	#else
23415eb5 JP	24	#define DBG(fmt, ...) \
	25	do { \
	26	if (0) \
	27	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
	28	} while (0)
4e10d12a DSL	29	#endif
	30	static LIST_HEAD(bus_type_list);
	31	static DECLARE_RWSEM(bus_type_sem);
	32
1033f904	33	#define PHYSICAL_NODE_STRING "physical_node"
007ccfcf	34	#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
1033f904	35
4e10d12a DSL	36	int register_acpi_bus_type(struct acpi_bus_type *type)
	37	{
	38	if (acpi_disabled)
	39	return -ENODEV;
53540098	40	if (type && type->match && type->find_device) {
4e10d12a DSL	41	down_write(&bus_type_sem);
	42	list_add_tail(&type->list, &bus_type_list);
	43	up_write(&bus_type_sem);
53540098	44	printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
4e10d12a DSL	45	return 0;
	46	}
	47	return -ENODEV;
	48	}
91e4d5a1	49	EXPORT_SYMBOL_GPL(register_acpi_bus_type);
4e10d12a	50
4e10d12a DSL	51	int unregister_acpi_bus_type(struct acpi_bus_type *type)
	52	{
	53	if (acpi_disabled)
	54	return 0;
	55	if (type) {
	56	down_write(&bus_type_sem);
	57	list_del_init(&type->list);
	58	up_write(&bus_type_sem);
53540098 RW	59	printk(KERN_INFO PREFIX "bus type %s unregistered\n",
53540098 RW	60	type->name);
4e10d12a DSL	61	return 0;
	62	}
	63	return -ENODEV;
	64	}
91e4d5a1	65	EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
4e10d12a	66
53540098	67	static struct acpi_bus_type acpi_get_bus_type(struct device dev)
4e10d12a DSL	68	{
	69	struct acpi_bus_type tmp, ret = NULL;
	70
	71	down_read(&bus_type_sem);
	72	list_for_each_entry(tmp, &bus_type_list, list) {
53540098	73	if (tmp->match(dev)) {
4e10d12a DSL	74	ret = tmp;
	75	break;
	76	}
	77	}
	78	up_read(&bus_type_sem);
	79	return ret;
	80	}
	81
60f75b8e RW	82	static acpi_status acpi_dev_present(acpi_handle handle, u32 lvl_not_used,
60f75b8e RW	83	void not_used, void *ret_p)
4e10d12a	84	{
60f75b8e RW	85	struct acpi_device *adev = NULL;
	86
	87	acpi_bus_get_device(handle, &adev);
	88	if (adev) {
	89	*ret_p = handle;
	90	return AE_CTRL_TERMINATE;
	91	}
	92	return AE_OK;
	93	}
	94
	95	static bool acpi_extra_checks_passed(acpi_handle handle, bool is_bridge)
	96	{
	97	unsigned long long sta;
	98	acpi_status status;
	99
	100	status = acpi_bus_get_status_handle(handle, &sta);
	101	if (ACPI_FAILURE(status) \|\| !(sta & ACPI_STA_DEVICE_ENABLED))
	102	return false;
	103
	104	if (is_bridge) {
	105	void *test = NULL;
	106
	107	/* Check if this object has at least one child device. */
	108	acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
	109	acpi_dev_present, NULL, NULL, &test);
	110	return !!test;
	111	}
	112	return true;
	113	}
	114
	115	struct find_child_context {
	116	u64 addr;
	117	bool is_bridge;
	118	acpi_handle ret;
	119	bool ret_checked;
	120	};
	121
	122	static acpi_status do_find_child(acpi_handle handle, u32 lvl_not_used,
	123	void data, void *not_used)
	124	{
	125	struct find_child_context *context = data;
	126	unsigned long long addr;
4e10d12a	127	acpi_status status;
33f767d7 RW	128
33f767d7 RW	129	status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &addr);
60f75b8e RW	130	if (ACPI_FAILURE(status) \|\| addr != context->addr)
	131	return AE_OK;
	132
	133	if (!context->ret) {
	134	/* This is the first matching object. Save its handle. */
	135	context->ret = handle;
	136	return AE_OK;
	137	}
	138	/*
	139	* There is more than one matching object with the same _ADR value.
	140	* That really is unexpected, so we are kind of beyond the scope of the
	141	* spec here. We have to choose which one to return, though.
	142	*
	143	* First, check if the previously found object is good enough and return
	144	* its handle if so. Second, check the same for the object that we've
	145	* just found.
	146	*/
	147	if (!context->ret_checked) {
	148	if (acpi_extra_checks_passed(context->ret, context->is_bridge))
c7d9ca90	149	return AE_CTRL_TERMINATE;
60f75b8e RW	150	else
	151	context->ret_checked = true;
	152	}
	153	if (acpi_extra_checks_passed(handle, context->is_bridge)) {
	154	context->ret = handle;
	155	return AE_CTRL_TERMINATE;
4e10d12a DSL	156	}
	157	return AE_OK;
	158	}
	159
60f75b8e	160	acpi_handle acpi_find_child(acpi_handle parent, u64 addr, bool is_bridge)
4e10d12a	161	{
60f75b8e RW	162	if (parent) {
	163	struct find_child_context context = {
	164	.addr = addr,
	165	.is_bridge = is_bridge,
	166	};
4e10d12a	167
60f75b8e RW	168	acpi_walk_namespace(ACPI_TYPE_DEVICE, parent, 1, do_find_child,
	169	NULL, &context, NULL);
	170	return context.ret;
	171	}
	172	return NULL;
33f767d7	173	}
60f75b8e	174	EXPORT_SYMBOL_GPL(acpi_find_child);
4e10d12a	175
bdbdbf91 RW	176	static void acpi_physnode_link_name(char *buf, unsigned int node_id)
	177	{
	178	if (node_id > 0)
	179	snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
	180	PHYSICAL_NODE_STRING "%u", node_id);
	181	else
	182	strcpy(buf, PHYSICAL_NODE_STRING);
	183	}
	184
ac212b69	185	int acpi_bind_one(struct device *dev, acpi_handle handle)
4e10d12a	186	{
1071695f	187	struct acpi_device *acpi_dev;
4e10d12a	188	acpi_status status;
f3fd0c8a	189	struct acpi_device_physical_node physical_node, pn;
007ccfcf RW	190	char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
	191	struct list_head *physnode_list;
	192	unsigned int node_id;
1033f904	193	int retval = -EINVAL;
4e10d12a	194
95f8a082	195	if (ACPI_HANDLE(dev)) {
f3fd0c8a RW	196	if (handle) {
	197	dev_warn(dev, "ACPI handle is already set\n");
	198	return -EINVAL;
	199	} else {
95f8a082	200	handle = ACPI_HANDLE(dev);
f3fd0c8a	201	}
4e10d12a	202	}
f3fd0c8a RW	203	if (!handle)
f3fd0c8a RW	204	return -EINVAL;
1033f904	205
4e10d12a	206	get_device(dev);
1033f904 LT	207	status = acpi_bus_get_device(handle, &acpi_dev);
	208	if (ACPI_FAILURE(status))
	209	goto err;
	210
f3fd0c8a	211	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
1033f904 LT	212	if (!physical_node) {
	213	retval = -ENOMEM;
	214	goto err;
4e10d12a	215	}
4e10d12a	216
1033f904	217	mutex_lock(&acpi_dev->physical_node_lock);
f3fd0c8a	218
007ccfcf RW	219	/*
	220	* Keep the list sorted by node_id so that the IDs of removed nodes can
	221	* be recycled easily.
	222	*/
	223	physnode_list = &acpi_dev->physical_node_list;
	224	node_id = 0;
	225	list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
	226	/* Sanity check. */
f3fd0c8a	227	if (pn->dev == dev) {
3342c753 RW	228	mutex_unlock(&acpi_dev->physical_node_lock);
3342c753 RW	229
f3fd0c8a	230	dev_warn(dev, "Already associated with ACPI node\n");
3342c753 RW	231	kfree(physical_node);
	232	if (ACPI_HANDLE(dev) != handle)
	233	goto err;
3fe444ad	234
3342c753 RW	235	put_device(dev);
3342c753 RW	236	return 0;
f3fd0c8a	237	}
007ccfcf RW	238	if (pn->node_id == node_id) {
	239	physnode_list = &pn->node;
	240	node_id++;
	241	}
1071695f DB	242	}
1071695f DB	243
007ccfcf	244	physical_node->node_id = node_id;
1033f904	245	physical_node->dev = dev;
007ccfcf	246	list_add(&physical_node->node, physnode_list);
1033f904	247	acpi_dev->physical_node_count++;
f3fd0c8a	248
95f8a082 RW	249	if (!ACPI_HANDLE(dev))
95f8a082 RW	250	ACPI_HANDLE_SET(dev, acpi_dev->handle);
1033f904	251
bdbdbf91	252	acpi_physnode_link_name(physical_node_name, node_id);
1033f904	253	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
f501b6ec	254	physical_node_name);
464c1147 RW	255	if (retval)
	256	dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
	257	physical_node_name, retval);
	258
1033f904	259	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
f501b6ec	260	"firmware_node");
464c1147 RW	261	if (retval)
	262	dev_err(dev, "Failed to create link firmware_node (%d)\n",
	263	retval);
1033f904	264
40055206 RW	265	mutex_unlock(&acpi_dev->physical_node_lock);
40055206 RW	266
1033f904 LT	267	if (acpi_dev->wakeup.flags.valid)
	268	device_set_wakeup_capable(dev, true);
	269
4e10d12a	270	return 0;
1033f904 LT	271
1033f904 LT	272	err:
95f8a082	273	ACPI_HANDLE_SET(dev, NULL);
1033f904 LT	274	put_device(dev);
1033f904 LT	275	return retval;
4e10d12a	276	}
ac212b69	277	EXPORT_SYMBOL_GPL(acpi_bind_one);
4e10d12a	278
ac212b69	279	int acpi_unbind_one(struct device *dev)
4e10d12a	280	{
1033f904 LT	281	struct acpi_device_physical_node *entry;
	282	struct acpi_device *acpi_dev;
	283	acpi_status status;
1033f904	284
95f8a082	285	if (!ACPI_HANDLE(dev))
4e10d12a	286	return 0;
1071695f	287
95f8a082	288	status = acpi_bus_get_device(ACPI_HANDLE(dev), &acpi_dev);
38e88839 RW	289	if (ACPI_FAILURE(status)) {
	290	dev_err(dev, "Oops, ACPI handle corrupt in %s()\n", __func__);
	291	return -EINVAL;
	292	}
1071695f	293
1033f904	294	mutex_lock(&acpi_dev->physical_node_lock);
3e332783 RW	295
	296	list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
	297	if (entry->dev == dev) {
	298	char physnode_name[PHYSICAL_NODE_NAME_SIZE];
	299
	300	list_del(&entry->node);
	301	acpi_dev->physical_node_count--;
	302
	303	acpi_physnode_link_name(physnode_name, entry->node_id);
	304	sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
	305	sysfs_remove_link(&dev->kobj, "firmware_node");
	306	ACPI_HANDLE_SET(dev, NULL);
	307	/* acpi_bind_one() increase refcnt by one. */
	308	put_device(dev);
	309	kfree(entry);
	310	break;
	311	}
	312
1033f904	313	mutex_unlock(&acpi_dev->physical_node_lock);
4e10d12a DSL	314	return 0;
4e10d12a DSL	315	}
ac212b69	316	EXPORT_SYMBOL_GPL(acpi_unbind_one);
4e10d12a DSL	317
	318	static int acpi_platform_notify(struct device *dev)
	319	{
53540098	320	struct acpi_bus_type *type = acpi_get_bus_type(dev);
4e10d12a	321	acpi_handle handle;
11909ca1	322	int ret;
4e10d12a	323
f3fd0c8a	324	ret = acpi_bind_one(dev, NULL);
92414481	325	if (ret && type) {
11909ca1 RW	326	ret = type->find_device(dev, &handle);
	327	if (ret) {
	328	DBG("Unable to get handle for %s\n", dev_name(dev));
	329	goto out;
	330	}
	331	ret = acpi_bind_one(dev, handle);
	332	if (ret)
	333	goto out;
4e10d12a	334	}
11909ca1 RW	335
	336	if (type && type->setup)
	337	type->setup(dev);
4e10d12a	338
f3fd0c8a	339	out:
4e10d12a DSL	340	#if ACPI_GLUE_DEBUG
	341	if (!ret) {
	342	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	343
a412a11d	344	acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
db1461ad	345	DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
02438d87	346	kfree(buffer.pointer);
4e10d12a	347	} else
db1461ad	348	DBG("Device %s -> No ACPI support\n", dev_name(dev));
4e10d12a DSL	349	#endif
	350
	351	return ret;
	352	}
	353
	354	static int acpi_platform_notify_remove(struct device *dev)
	355	{
11909ca1 RW	356	struct acpi_bus_type *type;
11909ca1 RW	357
53540098	358	type = acpi_get_bus_type(dev);
11909ca1 RW	359	if (type && type->cleanup)
	360	type->cleanup(dev);
	361
4e10d12a DSL	362	acpi_unbind_one(dev);
	363	return 0;
	364	}
	365
0e46517d	366	int __init init_acpi_device_notify(void)
4e10d12a	367	{
4e10d12a DSL	368	if (platform_notify \|\| platform_notify_remove) {
	369	printk(KERN_ERR PREFIX "Can't use platform_notify\n");
	370	return 0;
	371	}
	372	platform_notify = acpi_platform_notify;
	373	platform_notify_remove = acpi_platform_notify_remove;
	374	return 0;
	375	}