[mirror_ubuntu-jammy-kernel.git] / drivers / hwmon / hp_accel.c

/*
 *  hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
 *
 *  Copyright (C) 2007-2008 Yan Burman
 *  Copyright (C) 2008 Eric Piel
 *  Copyright (C) 2008-2009 Pavel Machek
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/kthread.h>
#include <linux/semaphore.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/poll.h>
#include <linux/freezer.h>
#include <linux/version.h>
#include <linux/uaccess.h>
#include <linux/leds.h>
#include <acpi/acpi_drivers.h>
#include <asm/atomic.h>
#include "lis3lv02d.h"

#define DRIVER_NAME     "lis3lv02d"
#define ACPI_MDPS_CLASS "accelerometer"

/* Delayed LEDs infrastructure ------------------------------------ */

/* Special LED class that can defer work */
struct delayed_led_classdev {
	struct led_classdev led_classdev;
	struct work_struct work;
	enum led_brightness new_brightness;

	unsigned int led;		/* For driver */
	void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
};

static inline void delayed_set_status_worker(struct work_struct *work)
{
	struct delayed_led_classdev *data =
			container_of(work, struct delayed_led_classdev, work);

	data->set_brightness(data, data->new_brightness);
}

static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
			      enum led_brightness brightness)
{
	struct delayed_led_classdev *data = container_of(led_cdev,
			     struct delayed_led_classdev, led_classdev);
	data->new_brightness = brightness;
	schedule_work(&data->work);
}

/* HP-specific accelerometer driver ------------------------------------ */

/* For automatic insertion of the module */
static struct acpi_device_id lis3lv02d_device_ids[] = {
	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);


/**
 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
 * @handle: the handle of the device
 *
 * Returns AE_OK on success.
 */
acpi_status lis3lv02d_acpi_init(acpi_handle handle)
{
	return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
}

/**
 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
 * @handle: the handle of the device
 * @reg:    the register to read
 * @ret:    result of the operation
 *
 * Returns AE_OK on success.
 */
acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret)
{
	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	struct acpi_object_list args = { 1, &arg0 };
	unsigned long long lret;
	acpi_status status;

	arg0.integer.value = reg;

	status = acpi_evaluate_integer(handle, "ALRD", &args, &lret);
	*ret = lret;
	return status;
}

/**
 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
 * @handle: the handle of the device
 * @reg:    the register to write to
 * @val:    the value to write
 *
 * Returns AE_OK on success.
 */
acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val)
{
	unsigned long long ret; /* Not used when writting */
	union acpi_object in_obj[2];
	struct acpi_object_list args = { 2, in_obj };

	in_obj[0].type          = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = reg;
	in_obj[1].type          = ACPI_TYPE_INTEGER;
	in_obj[1].integer.value = val;

	return acpi_evaluate_integer(handle, "ALWR", &args, &ret);
}

static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
{
	adev.ac = *((struct axis_conversion *)dmi->driver_data);
	printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);

	return 1;
}

/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
 * If the value is negative, the opposite of the hw value is used. */
static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3};

#define AXIS_DMI_MATCH(_ident, _name, _axis) {		\
	.ident = _ident,				\
	.callback = lis3lv02d_dmi_matched,		\
	.matches = {					\
		DMI_MATCH(DMI_PRODUCT_NAME, _name)	\
	},						\
	.driver_data = &lis3lv02d_axis_##_axis		\
}
static struct dmi_system_id lis3lv02d_dmi_ids[] = {
	/* product names are truncated to match all kinds of a same model */
	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
	{ NULL, }
/* Laptop models without axis info (yet):
 * "NC671xx" "HP Compaq 671"
 * "NC6910" "HP Compaq 6910"
 * HP Compaq 8710x Notebook PC / Mobile Workstation
 * "NC2400" "HP Compaq nc2400"
 * "NX74x0" "HP Compaq nx74"
 * "NX6325" "HP Compaq nx6325"
 * "NC4400" "HP Compaq nc4400"
 */
};

static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
{
	acpi_handle handle = adev.device->handle;
	unsigned long long ret; /* Not used when writing */
	union acpi_object in_obj[1];
	struct acpi_object_list args = { 1, in_obj };

	in_obj[0].type          = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = !!value;

	acpi_evaluate_integer(handle, "ALED", &args, &ret);
}

static struct delayed_led_classdev hpled_led = {
	.led_classdev = {
		.name			= "hp::hddprotect",
		.default_trigger	= "none",
		.brightness_set		= delayed_sysfs_set,
		.flags                  = LED_CORE_SUSPENDRESUME,
	},
	.set_brightness = hpled_set,
};

static int lis3lv02d_add(struct acpi_device *device)
{
	u8 val;
	int ret;

	if (!device)
		return -EINVAL;

	adev.device = device;
	adev.init = lis3lv02d_acpi_init;
	adev.read = lis3lv02d_acpi_read;
	adev.write = lis3lv02d_acpi_write;
	strcpy(acpi_device_name(device), DRIVER_NAME);
	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
	device->driver_data = &adev;

	lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val);
	if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) {
		printk(KERN_ERR DRIVER_NAME
				": Accelerometer chip not LIS3LV02D{L,Q}\n");
	}

	/* If possible use a "standard" axes order */
	if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
		printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
				 "using default axes configuration\n");
		adev.ac = lis3lv02d_axis_normal;
	}

	INIT_WORK(&hpled_led.work, delayed_set_status_worker);
	ret = led_classdev_register(NULL, &hpled_led.led_classdev);
	if (ret)
		return ret;

	ret = lis3lv02d_init_device(&adev);
	if (ret) {
		flush_work(&hpled_led.work);
		led_classdev_unregister(&hpled_led.led_classdev);
		return ret;
	}

	return ret;
}

static int lis3lv02d_remove(struct acpi_device *device, int type)
{
	if (!device)
		return -EINVAL;

	lis3lv02d_joystick_disable();
	lis3lv02d_poweroff(device->handle);

	flush_work(&hpled_led.work);
	led_classdev_unregister(&hpled_led.led_classdev);

	return lis3lv02d_remove_fs();
}


#ifdef CONFIG_PM
static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
{
	/* make sure the device is off when we suspend */
	lis3lv02d_poweroff(device->handle);
	return 0;
}

static int lis3lv02d_resume(struct acpi_device *device)
{
	/* put back the device in the right state (ACPI might turn it on) */
	mutex_lock(&adev.lock);
	if (adev.usage > 0)
		lis3lv02d_poweron(device->handle);
	else
		lis3lv02d_poweroff(device->handle);
	mutex_unlock(&adev.lock);
	return 0;
}
#else
#define lis3lv02d_suspend NULL
#define lis3lv02d_resume NULL
#endif

/* For the HP MDPS aka 3D Driveguard */
static struct acpi_driver lis3lv02d_driver = {
	.name  = DRIVER_NAME,
	.class = ACPI_MDPS_CLASS,
	.ids   = lis3lv02d_device_ids,
	.ops = {
		.add     = lis3lv02d_add,
		.remove  = lis3lv02d_remove,
		.suspend = lis3lv02d_suspend,
		.resume  = lis3lv02d_resume,
	}
};

static int __init lis3lv02d_init_module(void)
{
	int ret;

	if (acpi_disabled)
		return -ENODEV;

	ret = acpi_bus_register_driver(&lis3lv02d_driver);
	if (ret < 0)
		return ret;

	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");

	return 0;
}

static void __exit lis3lv02d_exit_module(void)
{
	acpi_bus_unregister_driver(&lis3lv02d_driver);
}

MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
MODULE_LICENSE("GPL");

module_init(lis3lv02d_init_module);
module_exit(lis3lv02d_exit_module);
Commit	Line	Data
cfce41a6 EP	1	/*
	2	* hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
	3	*
	4	* Copyright (C) 2007-2008 Yan Burman
	5	* Copyright (C) 2008 Eric Piel
9e1c9d86	6	* Copyright (C) 2008-2009 Pavel Machek
cfce41a6 EP	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/init.h>
	25	#include <linux/dmi.h>
	26	#include <linux/module.h>
	27	#include <linux/types.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/interrupt.h>
	30	#include <linux/input.h>
	31	#include <linux/kthread.h>
	32	#include <linux/semaphore.h>
	33	#include <linux/delay.h>
	34	#include <linux/wait.h>
	35	#include <linux/poll.h>
	36	#include <linux/freezer.h>
	37	#include <linux/version.h>
	38	#include <linux/uaccess.h>
9e0c7978	39	#include <linux/leds.h>
cfce41a6 EP	40	#include <acpi/acpi_drivers.h>
	41	#include <asm/atomic.h>
	42	#include "lis3lv02d.h"
	43
	44	#define DRIVER_NAME "lis3lv02d"
	45	#define ACPI_MDPS_CLASS "accelerometer"
	46
9e1c9d86 PM	47	/* Delayed LEDs infrastructure ------------------------------------ */
	48
	49	/* Special LED class that can defer work */
	50	struct delayed_led_classdev {
	51	struct led_classdev led_classdev;
	52	struct work_struct work;
	53	enum led_brightness new_brightness;
	54
	55	unsigned int led; /* For driver */
	56	void (set_brightness)(struct delayed_led_classdev data, enum led_brightness value);
	57	};
	58
	59	static inline void delayed_set_status_worker(struct work_struct *work)
	60	{
	61	struct delayed_led_classdev *data =
	62	container_of(work, struct delayed_led_classdev, work);
	63
	64	data->set_brightness(data, data->new_brightness);
	65	}
	66
	67	static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
	68	enum led_brightness brightness)
	69	{
	70	struct delayed_led_classdev *data = container_of(led_cdev,
	71	struct delayed_led_classdev, led_classdev);
	72	data->new_brightness = brightness;
	73	schedule_work(&data->work);
	74	}
	75
	76	/* HP-specific accelerometer driver ------------------------------------ */
cfce41a6 EP	77
	78	/* For automatic insertion of the module */
	79	static struct acpi_device_id lis3lv02d_device_ids[] = {
	80	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
	81	{"", 0},
	82	};
	83	MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
	84
	85
	86	/**
	87	* lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
	88	* @handle: the handle of the device
	89	*
	90	* Returns AE_OK on success.
	91	*/
	92	acpi_status lis3lv02d_acpi_init(acpi_handle handle)
	93	{
	94	return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
	95	}
	96
	97	/**
	98	* lis3lv02d_acpi_read - ACPI ALRD method: read a register
	99	* @handle: the handle of the device
	100	* @reg: the register to read
	101	* @ret: result of the operation
	102	*
	103	* Returns AE_OK on success.
	104	*/
	105	acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret)
	106	{
	107	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
	108	struct acpi_object_list args = { 1, &arg0 };
	109	unsigned long long lret;
	110	acpi_status status;
	111
	112	arg0.integer.value = reg;
	113
	114	status = acpi_evaluate_integer(handle, "ALRD", &args, &lret);
	115	*ret = lret;
	116	return status;
	117	}
	118
	119	/**
	120	* lis3lv02d_acpi_write - ACPI ALWR method: write to a register
	121	* @handle: the handle of the device
	122	* @reg: the register to write to
	123	* @val: the value to write
	124	*
	125	* Returns AE_OK on success.
	126	*/
	127	acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val)
	128	{
	129	unsigned long long ret; /* Not used when writting */
	130	union acpi_object in_obj[2];
	131	struct acpi_object_list args = { 2, in_obj };
	132
	133	in_obj[0].type = ACPI_TYPE_INTEGER;
	134	in_obj[0].integer.value = reg;
	135	in_obj[1].type = ACPI_TYPE_INTEGER;
	136	in_obj[1].integer.value = val;
	137
	138	return acpi_evaluate_integer(handle, "ALWR", &args, &ret);
	139	}
	140
141	static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
142	{
143	adev.ac = ((struct axis_conversion )dmi->driver_data);
144	printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
145
146	return 1;
147	}
148
149	/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
150	* If the value is negative, the opposite of the hw value is used. */
151	static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
152	static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
153	static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
154	static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
155	static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
156	static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
6bfef2b3	157	static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3};
cfce41a6 EP	158
	159	#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
	160	.ident = _ident, \
	161	.callback = lis3lv02d_dmi_matched, \
	162	.matches = { \
	163	DMI_MATCH(DMI_PRODUCT_NAME, _name) \
	164	}, \
	165	.driver_data = &lis3lv02d_axis_##_axis \
	166	}
	167	static struct dmi_system_id lis3lv02d_dmi_ids[] = {
	168	/* product names are truncated to match all kinds of a same model */
	169	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
	170	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
	171	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
	172	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
	173	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
	174	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
	175	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
6bfef2b3	176	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
cfce41a6 EP	177	{ NULL, }
cfce41a6 EP	178	/* Laptop models without axis info (yet):
cfce41a6 EP	179	* "NC671xx" "HP Compaq 671"
	180	* "NC6910" "HP Compaq 6910"
	181	* HP Compaq 8710x Notebook PC / Mobile Workstation
	182	* "NC2400" "HP Compaq nc2400"
	183	* "NX74x0" "HP Compaq nx74"
	184	* "NX6325" "HP Compaq nx6325"
	185	* "NC4400" "HP Compaq nc4400"
	186	*/
	187	};
	188
9e1c9d86	189	static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
9e0c7978	190	{
9e1c9d86	191	acpi_handle handle = adev.device->handle;
9e0c7978 EP	192	unsigned long long ret; /* Not used when writing */
	193	union acpi_object in_obj[1];
	194	struct acpi_object_list args = { 1, in_obj };
	195
	196	in_obj[0].type = ACPI_TYPE_INTEGER;
9e1c9d86	197	in_obj[0].integer.value = !!value;
9e0c7978	198
9e1c9d86	199	acpi_evaluate_integer(handle, "ALED", &args, &ret);
9e0c7978 EP	200	}
9e0c7978 EP	201
9e1c9d86 PM	202	static struct delayed_led_classdev hpled_led = {
	203	.led_classdev = {
	204	.name = "hp::hddprotect",
	205	.default_trigger = "none",
	206	.brightness_set = delayed_sysfs_set,
	207	.flags = LED_CORE_SUSPENDRESUME,
	208	},
	209	.set_brightness = hpled_set,
9e0c7978	210	};
cfce41a6 EP	211
	212	static int lis3lv02d_add(struct acpi_device *device)
	213	{
	214	u8 val;
9e0c7978	215	int ret;
cfce41a6 EP	216
	217	if (!device)
	218	return -EINVAL;
	219
	220	adev.device = device;
	221	adev.init = lis3lv02d_acpi_init;
	222	adev.read = lis3lv02d_acpi_read;
	223	adev.write = lis3lv02d_acpi_write;
	224	strcpy(acpi_device_name(device), DRIVER_NAME);
	225	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
	226	device->driver_data = &adev;
	227
	228	lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val);
	229	if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) {
	230	printk(KERN_ERR DRIVER_NAME
	231	": Accelerometer chip not LIS3LV02D{L,Q}\n");
	232	}
	233
	234	/* If possible use a "standard" axes order */
	235	if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
	236	printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
	237	"using default axes configuration\n");
	238	adev.ac = lis3lv02d_axis_normal;
	239	}
	240
9e1c9d86 PM	241	INIT_WORK(&hpled_led.work, delayed_set_status_worker);
9e1c9d86 PM	242	ret = led_classdev_register(NULL, &hpled_led.led_classdev);
9e0c7978 EP	243	if (ret)
	244	return ret;
	245
	246	ret = lis3lv02d_init_device(&adev);
	247	if (ret) {
9e1c9d86 PM	248	flush_work(&hpled_led.work);
9e1c9d86 PM	249	led_classdev_unregister(&hpled_led.led_classdev);
9e0c7978 EP	250	return ret;
	251	}
	252
	253	return ret;
cfce41a6 EP	254	}
	255
	256	static int lis3lv02d_remove(struct acpi_device *device, int type)
	257	{
	258	if (!device)
	259	return -EINVAL;
	260
	261	lis3lv02d_joystick_disable();
	262	lis3lv02d_poweroff(device->handle);
	263
9e1c9d86 PM	264	flush_work(&hpled_led.work);
9e1c9d86 PM	265	led_classdev_unregister(&hpled_led.led_classdev);
9e0c7978	266
cfce41a6 EP	267	return lis3lv02d_remove_fs();
	268	}
	269
	270
	271	#ifdef CONFIG_PM
	272	static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
	273	{
	274	/* make sure the device is off when we suspend */
	275	lis3lv02d_poweroff(device->handle);
	276	return 0;
	277	}
	278
	279	static int lis3lv02d_resume(struct acpi_device *device)
	280	{
	281	/* put back the device in the right state (ACPI might turn it on) */
	282	mutex_lock(&adev.lock);
	283	if (adev.usage > 0)
	284	lis3lv02d_poweron(device->handle);
	285	else
	286	lis3lv02d_poweroff(device->handle);
	287	mutex_unlock(&adev.lock);
	288	return 0;
	289	}
	290	#else
	291	#define lis3lv02d_suspend NULL
	292	#define lis3lv02d_resume NULL
	293	#endif
	294
	295	/* For the HP MDPS aka 3D Driveguard */
	296	static struct acpi_driver lis3lv02d_driver = {
	297	.name = DRIVER_NAME,
	298	.class = ACPI_MDPS_CLASS,
	299	.ids = lis3lv02d_device_ids,
	300	.ops = {
	301	.add = lis3lv02d_add,
	302	.remove = lis3lv02d_remove,
	303	.suspend = lis3lv02d_suspend,
	304	.resume = lis3lv02d_resume,
	305	}
	306	};
	307
	308	static int __init lis3lv02d_init_module(void)
	309	{
	310	int ret;
	311
	312	if (acpi_disabled)
	313	return -ENODEV;
	314
	315	ret = acpi_bus_register_driver(&lis3lv02d_driver);
	316	if (ret < 0)
	317	return ret;
	318
	319	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
	320
	321	return 0;
	322	}
	323
	324	static void __exit lis3lv02d_exit_module(void)
	325	{
	326	acpi_bus_unregister_driver(&lis3lv02d_driver);
	327	}
	328
9e0c7978	329	MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
cfce41a6 EP	330	MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
	331	MODULE_LICENSE("GPL");
	332
	333	module_init(lis3lv02d_init_module);
	334	module_exit(lis3lv02d_exit_module);
	335