+static ssize_t
+store_chassis_clear(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct w83792d_data *data = i2c_get_clientdata(client);
+ unsigned long val;
+ u8 reg;
+
+ if (strict_strtoul(buf, 10, &val) || val != 0)
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ reg = w83792d_read_value(client, W83792D_REG_CHASSIS_CLR);
+ w83792d_write_value(client, W83792D_REG_CHASSIS_CLR, reg | 0x80);
+ data->valid = 0; /* Force cache refresh */
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+