W83793_REG_FAN_MIN
w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
w83793_write_value(client, W83793_REG_FAN_MIN(index),
w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);