drivers/hwmon/hp_accel.c - kernel/msm-4.9 - Gitiles

 /*
  *  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_rotated_left_usd = {-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};
 static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {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		\
 }

 #define AXIS_DMI_MATCH2(_ident, _class1, _name1,	\
 				_class2, _name2,	\
 				_axis) {		\
 	.ident = _ident,				\
 	.callback = lis3lv02d_dmi_matched,		\
 	.matches = {					\
 		DMI_MATCH(DMI_##_class1, _name1),	\
 		DMI_MATCH(DMI_##_class2, _name2),	\
 	},						\
 	.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("NC653x", "HP Compaq 653", xy_rotated_left_usd),
 	AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd),
 	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
 	AXIS_DMI_MATCH("NC671xx", "HP Compaq 671", xy_swap_yz_inverted),
 	/* Intel-based HP Pavilion dv5 */
 	AXIS_DMI_MATCH2("HPDV5_I",
 			PRODUCT_NAME, "HP Pavilion dv5",
 			BOARD_NAME, "3603",
 			x_inverted),
 	/* AMD-based HP Pavilion dv5 */
 	AXIS_DMI_MATCH2("HPDV5_A",
 			PRODUCT_NAME, "HP Pavilion dv5",
 			BOARD_NAME, "3600",
 			y_inverted),
 	{ NULL, }
 /* Laptop models without axis info (yet):
  * "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 acpi_status
 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
 {
 	if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
 		struct acpi_resource_extended_irq *irq;
 		u32 *device_irq = context;

 		irq = &resource->data.extended_irq;
 		*device_irq = irq->interrupts[0];
 	}

 	return AE_OK;
 }

 static void lis3lv02d_enum_resources(struct acpi_device *device)
 {
 	acpi_status status;

 	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
 					lis3lv02d_get_resource, &adev.irq);
 	if (ACPI_FAILURE(status))
 		printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
 }

 static s16 lis3lv02d_read_16(acpi_handle handle, int reg)
 {
 	u8 lo, hi;

 	adev.read(handle, reg - 1, &lo);
 	adev.read(handle, reg, &hi);
 	/* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
 	return (s16)((hi << 8) | lo);
 }

 static s16 lis3lv02d_read_8(acpi_handle handle, int reg)
 {
 	s8 lo;
 	adev.read(handle, reg, &lo);
 	return lo;
 }

 static int lis3lv02d_add(struct acpi_device *device)
 {
 	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, &adev.whoami);
 	switch (adev.whoami) {
 	case LIS_DOUBLE_ID:
 		printk(KERN_INFO DRIVER_NAME ": 2-byte sensor found\n");
 		adev.read_data = lis3lv02d_read_16;
 		adev.mdps_max_val = 2048;
 		break;
 	case LIS_SINGLE_ID:
 		printk(KERN_INFO DRIVER_NAME ": 1-byte sensor found\n");
 		adev.read_data = lis3lv02d_read_8;
 		adev.mdps_max_val = 128;
 		break;
 	default:
 		printk(KERN_ERR DRIVER_NAME
 			": unknown sensor type 0x%X\n", adev.whoami);
 		return -EINVAL;
 	}

 	/* 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;

 	/* obtain IRQ number of our device from ACPI */
 	lis3lv02d_enum_resources(adev.device);

 	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);
	/*
	* 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_rotated_left_usd = {-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};
	static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {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 \
	}

	#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
	_class2, _name2, \
	_axis) { \
	.ident = _ident, \
	.callback = lis3lv02d_dmi_matched, \
	.matches = { \
	DMI_MATCH(DMI_##_class1, _name1), \
	DMI_MATCH(DMI_##_class2, _name2), \
	}, \
	.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("NC653x", "HP Compaq 653", xy_rotated_left_usd),
	AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd),
	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
	AXIS_DMI_MATCH("NC671xx", "HP Compaq 671", xy_swap_yz_inverted),
	/* Intel-based HP Pavilion dv5 */
	AXIS_DMI_MATCH2("HPDV5_I",
	PRODUCT_NAME, "HP Pavilion dv5",
	BOARD_NAME, "3603",
	x_inverted),
	/* AMD-based HP Pavilion dv5 */
	AXIS_DMI_MATCH2("HPDV5_A",
	PRODUCT_NAME, "HP Pavilion dv5",
	BOARD_NAME, "3600",
	y_inverted),
	{ NULL, }
	/* Laptop models without axis info (yet):
	* "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 acpi_status
	lis3lv02d_get_resource(struct acpi_resource resource, void context)
	{
	if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
	struct acpi_resource_extended_irq *irq;
	u32 *device_irq = context;

	irq = &resource->data.extended_irq;
	*device_irq = irq->interrupts[0];
	}

	return AE_OK;
	}

	static void lis3lv02d_enum_resources(struct acpi_device *device)
	{
	acpi_status status;

	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
	lis3lv02d_get_resource, &adev.irq);
	if (ACPI_FAILURE(status))
	printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
	}

	static s16 lis3lv02d_read_16(acpi_handle handle, int reg)
	{
	u8 lo, hi;

	adev.read(handle, reg - 1, &lo);
	adev.read(handle, reg, &hi);
	/* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
	return (s16)((hi << 8) \| lo);
	}

	static s16 lis3lv02d_read_8(acpi_handle handle, int reg)
	{
	s8 lo;
	adev.read(handle, reg, &lo);
	return lo;
	}

	static int lis3lv02d_add(struct acpi_device *device)
	{
	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, &adev.whoami);
	switch (adev.whoami) {
	case LIS_DOUBLE_ID:
	printk(KERN_INFO DRIVER_NAME ": 2-byte sensor found\n");
	adev.read_data = lis3lv02d_read_16;
	adev.mdps_max_val = 2048;
	break;
	case LIS_SINGLE_ID:
	printk(KERN_INFO DRIVER_NAME ": 1-byte sensor found\n");
	adev.read_data = lis3lv02d_read_8;
	adev.mdps_max_val = 128;
	break;
	default:
	printk(KERN_ERR DRIVER_NAME
	": unknown sensor type 0x%X\n", adev.whoami);
	return -EINVAL;
	}

	/* 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;

	/* obtain IRQ number of our device from ACPI */
	lis3lv02d_enum_resources(adev.device);

	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);