+static ssize_t set_pwm_freq(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct it87_data *data = i2c_get_clientdata(client);
+ unsigned long val = simple_strtoul(buf, NULL, 10);
+ int i;
+
+ /* Search for the nearest available frequency */
+ for (i = 0; i < 7; i++) {
+ if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
+ break;
+ }
+
+ mutex_lock(&data->update_lock);
+ data->fan_ctl = it87_read_value(client, IT87_REG_FAN_CTL) & 0x8f;
+ data->fan_ctl |= i << 4;
+ it87_write_value(client, IT87_REG_FAN_CTL, data->fan_ctl);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}