Symbol: TX_HW_FLOW_CTL_EN
drivers/tty/serial/sprd_serial.c
847
fc &= ~(RX_HW_FLOW_CTL_THLD | RX_HW_FLOW_CTL_EN | TX_HW_FLOW_CTL_EN);
drivers/tty/serial/sprd_serial.c
851
fc |= TX_HW_FLOW_CTL_EN;