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serial: 8250_fintek: Disable delays for ports != 0

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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>
This commit is contained in:
Ricardo Ribalda Delgado 2017-11-06 11:49:13 +01:00 committed by Greg Kroah-Hartman
parent 7ecc77011c
commit 21c4e7f255
1 changed files with 6 additions and 0 deletions
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6
drivers/tty/serial/8250/8250_fintek.c
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@ -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;