int acpi_i2c_install_space_handler(struct i2c_adapter *adapter)
{
	acpi_handle handle = ACPI_HANDLE(adapter->dev.parent);
	struct acpi_i2c_handler_data *data;
	acpi_status status;

	if (!handle)
		return -ENODEV;

	data = kzalloc(sizeof(struct acpi_i2c_handler_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->adapter = adapter;
	status = acpi_bus_attach_private_data(handle, (void *)data);
	if (ACPI_FAILURE(status)) {
		kfree(data);
		return -ENOMEM;
	}

	status = acpi_install_address_space_handler(handle,
				ACPI_ADR_SPACE_GSBUS,
				&acpi_i2c_space_handler,
				NULL,
				data);
	if (ACPI_FAILURE(status)) {
		dev_err(&adapter->dev, "Error installing i2c space handler\n");
		acpi_bus_detach_private_data(handle);
		kfree(data);
		return -ENOMEM;
	}

	return 0;
}
static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
{
	int trips = 0;
	int result;
	acpi_status status;
	int i;

	if (tz->trips.critical.flags.valid)
		trips++;

	if (tz->trips.hot.flags.valid)
		trips++;

	if (tz->trips.passive.flags.valid)
		trips++;

	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
			tz->trips.active[i].flags.valid; i++, trips++);

	if (tz->trips.passive.flags.valid)
		tz->thermal_zone =
			thermal_zone_device_register("acpitz", trips, 0, tz,
						&acpi_thermal_zone_ops, NULL,
						     tz->trips.passive.tsp*100,
						     tz->polling_frequency*100);
	else
		tz->thermal_zone =
			thermal_zone_device_register("acpitz", trips, 0, tz,
						&acpi_thermal_zone_ops, NULL,
						0, tz->polling_frequency*100);
	if (IS_ERR(tz->thermal_zone))
		return -ENODEV;

	result = sysfs_create_link(&tz->device->dev.kobj,
				   &tz->thermal_zone->device.kobj, "thermal_zone");
	if (result)
		return result;

	result = sysfs_create_link(&tz->thermal_zone->device.kobj,
				   &tz->device->dev.kobj, "device");
	if (result)
		return result;

	status =  acpi_bus_attach_private_data(tz->device->handle,
					       tz->thermal_zone);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	tz->tz_enabled = 1;

	dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
		 tz->thermal_zone->id);
	return 0;
}