M_TACH_UNIT 722 drivers/hwmon/aspeed-pwm-tacho.c priv->type_fan_tach_unit[TYPEM] = M_TACH_UNIT; M_TACH_UNIT 725 drivers/hwmon/aspeed-pwm-tacho.c M_TACH_UNIT, M_TACH_CLK_DIV);