According to the datasheet, only the first port supports delay before
send and delay after send.
Reported-by: "Ji-Ze Hong (Peter Hong)" <hpeter@xxxxxxxxx>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
---
drivers/tty/serial/8250/8250_fintek.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c
index ca7e96f9f080..61745d4bea31 100644
--- a/drivers/tty/serial/8250/8250_fintek.c
+++ b/drivers/tty/serial/8250/8250_fintek.c
@@ -216,6 +216,12 @@ static int fintek_8250_rs485_config(struct uart_port *port,
rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND |
SER_RS485_RTS_AFTER_SEND;
+ /* Only the first port supports delays */
+ if (pdata->index) {
+ rs485->delay_rts_before_send = 0;
+ rs485->delay_rts_after_send = 0;
+ }
+
if (rs485->delay_rts_before_send) {
rs485->delay_rts_before_send = 1;
config |= TXW4C_IRA;
--
2.14.2
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