The comment in imx_flush_buffer() states that the state of 4 registers
are to be saved/restored, then only saves and restores 3 registers. The
missing register (UBRC) is read only and thus can't be restored.
Update the comment to reflect reality.
Signed-off-by: Martyn Welch
---
v2: Remove trailing whitespace.
drivers/tty/serial/imx.c | 8 ++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index b697c1e..76818a2 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);
--
1.8.3.1
