static int __devinit toshiba_acpi_add(struct acpi_device *acpi_dev)
{
	struct toshiba_acpi_dev *dev;
	const char *hci_method;
	u32 dummy;
	bool bt_present;
	int ret = 0;
	struct backlight_properties props;

	if (toshiba_acpi)
		return -EBUSY;

	pr_info("Toshiba Laptop ACPI Extras version %s\n",
	       TOSHIBA_ACPI_VERSION);

	hci_method = find_hci_method(acpi_dev->handle);
	if (!hci_method) {
		pr_err("HCI interface not found\n");
		return -ENODEV;
	}

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;
	dev->acpi_dev = acpi_dev;
	dev->method_hci = hci_method;
	acpi_dev->driver_data = dev;

	if (toshiba_acpi_setup_keyboard(dev))
		pr_info("Unable to activate hotkeys\n");

	mutex_init(&dev->mutex);

	props.type = BACKLIGHT_PLATFORM;
	props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
	dev->backlight_dev = backlight_device_register("toshiba",
						       &acpi_dev->dev,
						       dev,
						       &toshiba_backlight_data,
						       &props);
	if (IS_ERR(dev->backlight_dev)) {
		ret = PTR_ERR(dev->backlight_dev);

		pr_err("Could not register toshiba backlight device\n");
		dev->backlight_dev = NULL;
		goto error;
	}
	dev->backlight_dev->props.brightness = get_lcd(dev->backlight_dev);

	/*                                      */
	if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
		dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
					   &acpi_dev->dev,
					   RFKILL_TYPE_BLUETOOTH,
					   &toshiba_rfk_ops,
					   dev);
		if (!dev->bt_rfk) {
			pr_err("unable to allocate rfkill device\n");
			ret = -ENOMEM;
			goto error;
		}

		ret = rfkill_register(dev->bt_rfk);
		if (ret) {
			pr_err("unable to register rfkill device\n");
			rfkill_destroy(dev->bt_rfk);
			goto error;
		}
	}

	if (toshiba_illumination_available(dev)) {
		dev->led_dev.name = "toshiba::illumination";
		dev->led_dev.max_brightness = 1;
		dev->led_dev.brightness_set = toshiba_illumination_set;
		dev->led_dev.brightness_get = toshiba_illumination_get;
		if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
			dev->illumination_supported = 1;
	}

	/*                                                                 */

	ret = get_video_status(dev, &dummy);
	dev->video_supported = !ret;

	ret = get_fan_status(dev, &dummy);
	dev->fan_supported = !ret;

	create_toshiba_proc_entries(dev);

	toshiba_acpi = dev;

	return 0;

error:
	toshiba_acpi_remove(acpi_dev, 0);
	return ret;
}
static int toshiba_acpi_add(struct acpi_device *acpi_dev)
{
	struct toshiba_acpi_dev *dev;
	const char *hci_method;
	u32 dummy;
	bool bt_present;
	int ret = 0;

	if (toshiba_acpi)
		return -EBUSY;

	pr_info("Toshiba Laptop ACPI Extras version %s\n",
	       TOSHIBA_ACPI_VERSION);

	hci_method = find_hci_method(acpi_dev->handle);
	if (!hci_method) {
		pr_err("HCI interface not found\n");
		return -ENODEV;
	}

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;
	dev->acpi_dev = acpi_dev;
	dev->method_hci = hci_method;
	acpi_dev->driver_data = dev;

	if (toshiba_acpi_setup_keyboard(dev))
		pr_info("Unable to activate hotkeys\n");

	mutex_init(&dev->mutex);

	ret = toshiba_acpi_setup_backlight(dev);
	if (ret)
		goto error;

	/* Register rfkill switch for Bluetooth */
	if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
		dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
					   &acpi_dev->dev,
					   RFKILL_TYPE_BLUETOOTH,
					   &toshiba_rfk_ops,
					   dev);
		if (!dev->bt_rfk) {
			pr_err("unable to allocate rfkill device\n");
			ret = -ENOMEM;
			goto error;
		}

		ret = rfkill_register(dev->bt_rfk);
		if (ret) {
			pr_err("unable to register rfkill device\n");
			rfkill_destroy(dev->bt_rfk);
			goto error;
		}
	}

	if (toshiba_illumination_available(dev)) {
		dev->led_dev.name = "toshiba::illumination";
		dev->led_dev.max_brightness = 1;
		dev->led_dev.brightness_set = toshiba_illumination_set;
		dev->led_dev.brightness_get = toshiba_illumination_get;
		if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
			dev->illumination_supported = 1;
	}

	/* Determine whether or not BIOS supports fan and video interfaces */

	ret = get_video_status(dev, &dummy);
	dev->video_supported = !ret;

	ret = get_fan_status(dev, &dummy);
	dev->fan_supported = !ret;

	create_toshiba_proc_entries(dev);

	toshiba_acpi = dev;

	return 0;

error:
	toshiba_acpi_remove(acpi_dev);
	return ret;
}