adt7470.c

linux 内核源代码

	if (!(attr->index % 2)) {
		reg &= 0xF;
		reg |= (temp << 4) & 0xF0;
	} else {
		reg &= 0xF0;
		reg |= temp & 0xF;
	}

	i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
	mutex_unlock(&data->lock);

	return count;
}

static SENSOR_DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL, 0);
static SENSOR_DEVICE_ATTR(alarm_mask, S_IRUGO, show_alarms, NULL, 1);

static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 1);
static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 2);
static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 3);
static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 4);
static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 5);
static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 6);
static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 7);
static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 8);
static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
		    set_temp_max, 9);

static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 1);
static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 2);
static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 3);
static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 4);
static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 5);
static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 6);
static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 7);
static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 8);
static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
		    set_temp_min, 9);

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);

static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
		    set_fan_max, 0);
static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
		    set_fan_max, 1);
static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
		    set_fan_max, 2);
static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
		    set_fan_max, 3);

static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
		    set_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
		    set_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
		    set_fan_min, 2);
static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
		    set_fan_min, 3);

static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);

static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
		    show_force_pwm_max, set_force_pwm_max, 0);

static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);

static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_min, set_pwm_min, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_min, set_pwm_min, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_min, set_pwm_min, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_min, set_pwm_min, 3);

static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_max, set_pwm_max, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_max, set_pwm_max, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_max, set_pwm_max, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
		    show_pwm_max, set_pwm_max, 3);

static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
		    show_pwm_tmin, set_pwm_tmin, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
		    show_pwm_tmin, set_pwm_tmin, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
		    show_pwm_tmin, set_pwm_tmin, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
		    show_pwm_tmin, set_pwm_tmin, 3);

static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
		    NULL, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
		    NULL, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
		    NULL, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
		    NULL, 3);

static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
		    set_pwm_auto, 0);
static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
		    set_pwm_auto, 1);
static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
		    set_pwm_auto, 2);
static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
		    set_pwm_auto, 3);

static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
		    show_pwm_auto_temp, set_pwm_auto_temp, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
		    show_pwm_auto_temp, set_pwm_auto_temp, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
		    show_pwm_auto_temp, set_pwm_auto_temp, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
		    show_pwm_auto_temp, set_pwm_auto_temp, 3);

static struct attribute *adt7470_attr[] =
{
	&sensor_dev_attr_alarms.dev_attr.attr,
	&sensor_dev_attr_alarm_mask.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_temp4_max.dev_attr.attr,
	&sensor_dev_attr_temp5_max.dev_attr.attr,
	&sensor_dev_attr_temp6_max.dev_attr.attr,
	&sensor_dev_attr_temp7_max.dev_attr.attr,
	&sensor_dev_attr_temp8_max.dev_attr.attr,
	&sensor_dev_attr_temp9_max.dev_attr.attr,
	&sensor_dev_attr_temp10_max.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp2_min.dev_attr.attr,
	&sensor_dev_attr_temp3_min.dev_attr.attr,
	&sensor_dev_attr_temp4_min.dev_attr.attr,
	&sensor_dev_attr_temp5_min.dev_attr.attr,
	&sensor_dev_attr_temp6_min.dev_attr.attr,
	&sensor_dev_attr_temp7_min.dev_attr.attr,
	&sensor_dev_attr_temp8_min.dev_attr.attr,
	&sensor_dev_attr_temp9_min.dev_attr.attr,
	&sensor_dev_attr_temp10_min.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp4_input.dev_attr.attr,
	&sensor_dev_attr_temp5_input.dev_attr.attr,
	&sensor_dev_attr_temp6_input.dev_attr.attr,
	&sensor_dev_attr_temp7_input.dev_attr.attr,
	&sensor_dev_attr_temp8_input.dev_attr.attr,
	&sensor_dev_attr_temp9_input.dev_attr.attr,
	&sensor_dev_attr_temp10_input.dev_attr.attr,
	&sensor_dev_attr_fan1_max.dev_attr.attr,
	&sensor_dev_attr_fan2_max.dev_attr.attr,
	&sensor_dev_attr_fan3_max.dev_attr.attr,
	&sensor_dev_attr_fan4_max.dev_attr.attr,
	&sensor_dev_attr_fan1_min.dev_attr.attr,
	&sensor_dev_attr_fan2_min.dev_attr.attr,
	&sensor_dev_attr_fan3_min.dev_attr.attr,
	&sensor_dev_attr_fan4_min.dev_attr.attr,
	&sensor_dev_attr_fan1_input.dev_attr.attr,
	&sensor_dev_attr_fan2_input.dev_attr.attr,
	&sensor_dev_attr_fan3_input.dev_attr.attr,
	&sensor_dev_attr_fan4_input.dev_attr.attr,
	&sensor_dev_attr_force_pwm_max.dev_attr.attr,
	&sensor_dev_attr_pwm1.dev_attr.attr,
	&sensor_dev_attr_pwm2.dev_attr.attr,
	&sensor_dev_attr_pwm3.dev_attr.attr,
	&sensor_dev_attr_pwm4.dev_attr.attr,
	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
	&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
	&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
	&sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
	&sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
	&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
	&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
	&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
	&sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
	&sensor_dev_attr_pwm4_enable.dev_attr.attr,
	&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
	&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
	&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
	&sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
	NULL
};

static int adt7470_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, adt7470_detect);
}

static int adt7470_detect(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *client;
	struct adt7470_data *data;
	int err = 0;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		goto exit;

	if (!(data = kzalloc(sizeof(struct adt7470_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}

	client = &data->client;
	client->addr = address;
	client->adapter = adapter;
	client->driver = &adt7470_driver;

	i2c_set_clientdata(client, data);

	mutex_init(&data->lock);

	if (kind <= 0) {
		int vendor, device, revision;

		vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
		if (vendor != ADT7470_VENDOR) {
			err = -ENODEV;
			goto exit_free;
		}

		device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
		if (device != ADT7470_DEVICE) {
			err = -ENODEV;
			goto exit_free;
		}

		revision = i2c_smbus_read_byte_data(client,
						    ADT7470_REG_REVISION);
		if (revision != ADT7470_REVISION) {
			err = -ENODEV;
			goto exit_free;
		}
	} else
		dev_dbg(&adapter->dev, "detection forced\n");

	strlcpy(client->name, "adt7470", I2C_NAME_SIZE);

	if ((err = i2c_attach_client(client)))
		goto exit_free;

	dev_info(&client->dev, "%s chip found\n", client->name);

	/* Initialize the ADT7470 chip */
	adt7470_init_client(client);

	/* Register sysfs hooks */
	data->attrs.attrs = adt7470_attr;
	if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
		goto exit_detach;

	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto exit_remove;
	}

	return 0;

exit_remove:
	sysfs_remove_group(&client->dev.kobj, &data->attrs);
exit_detach:
	i2c_detach_client(client);
exit_free:
	kfree(data);
exit:
	return err;
}

static int adt7470_detach_client(struct i2c_client *client)
{
	struct adt7470_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &data->attrs);
	i2c_detach_client(client);
	kfree(data);
	return 0;
}

static int __init adt7470_init(void)
{
	return i2c_add_driver(&adt7470_driver);
}

static void __exit adt7470_exit(void)
{
	i2c_del_driver(&adt7470_driver);
}

MODULE_AUTHOR("Darrick J. Wong <[e-mail]>");
MODULE_DESCRIPTION("ADT7470 driver");
MODULE_LICENSE("GPL");

module_init(adt7470_init);
module_exit(adt7470_exit);