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authorRicardo Ribalda Delgado <ricardo.ribalda@gmail.com>2017-11-06 13:49:13 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-11-08 15:09:35 +0300
commit21c4e7f255e38620bb4c5d1119c64114ab280e2e (patch)
tree355f5b6433c2e2c1f9494e2057745615e4218654 /drivers/tty
parent7ecc77011c6fb40d3eef7c6a0ebcec61e69b3ec3 (diff)
downloadlinux-21c4e7f255e38620bb4c5d1119c64114ab280e2e.tar.xz
serial: 8250_fintek: Disable delays for ports != 0
According to the datasheet, only the first port supports delay before send and delay after send. Reported-by: "Ji-Ze Hong (Peter Hong)" <hpeter@gmail.com> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/8250/8250_fintek.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c
index 6c7910d8e136..ae7d86e44b76 100644
--- a/drivers/tty/serial/8250/8250_fintek.c
+++ b/drivers/tty/serial/8250/8250_fintek.c
@@ -212,6 +212,12 @@ 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;