RX_HW_FLOW_CTL_THLD  853 drivers/tty/serial/sprd_serial.c 	fc &= ~(RX_HW_FLOW_CTL_THLD | RX_HW_FLOW_CTL_EN | TX_HW_FLOW_CTL_EN);
RX_HW_FLOW_CTL_THLD  855 drivers/tty/serial/sprd_serial.c 		fc |= RX_HW_FLOW_CTL_THLD;