tty/serial/sifive.c

300  * __ssp_enable_txwm() - enable transmit watermark interrupts
303  * Enable interrupt generation when the transmit FIFO watermark is reached
316  * __ssp_enable_rxwm() - enable receive watermark interrupts
319  * Enable interrupt generation when the receive FIFO watermark is reached
332  * __ssp_disable_txwm() - disable transmit watermark interrupts
335  * Disable interrupt generation when the transmit FIFO watermark is reached
348  * __ssp_disable_rxwm() - disable receive watermark interrupts
351  * Disable interrupt generation when the receive FIFO watermark is reached
600 		 * The TX watermark is always set to 1 by this driver, which  in sifive_serial_clk_notifier()
974 	/* Enable transmits and set the watermark level to 1 */  in sifive_serial_probe()
979 	/* Enable receives and set the watermark level to 0 */  in sifive_serial_probe()