diff options
| -rw-r--r-- | drivers/tty/serial/imx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index b697c1eefa74..76818a266403 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1417,10 +1417,14 @@ static void imx_flush_buffer(struct uart_port *port) /* * According to the Reference Manual description of the UART SRST bit: + * * "Reset the transmit and receive state machines, * all FIFOs and register USR1, USR2, UBIR, UBMR, UBRC, URXD, UTXD - * and UTS[6-3]". As we don't need to restore the old values from - * USR1, USR2, URXD, UTXD, only save/restore the other four registers + * and UTS[6-3]". + * + * We don't need to restore the old values from USR1, USR2, URXD and + * UTXD. UBRC is read only, so only save/restore the other three + * registers. */ ubir = readl(sport->port.membase + UBIR); ubmr = readl(sport->port.membase + UBMR); |