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serial: fsl_lpuart: clear unsupported options in .rs485_config() 

The struct serial_rs485 parameter is both input and output and is
supposed to hold the actually used configuration on return. So clear
unsupported settings.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König 2017-07-18 12:59:40 +02:00 committed by Greg Kroah-Hartman
parent 7d8905d064
commit 68c338eaa0
1 changed files with 5 additions and 0 deletions
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5
drivers/tty/serial/fsl_lpuart.c
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@ -1076,6 +1076,11 @@ static int lpuart_config_rs485(struct uart_port *port,
~(UARTMODEM_TXRTSPOL | UARTMODEM_TXRTSE);
writeb(modem, sport->port.membase + UARTMODEM);
/* clear unsupported configurations */
rs485->delay_rts_before_send = 0;
rs485->delay_rts_after_send = 0;
rs485->flags &= ~SER_RS485_RX_DURING_TX;
if (rs485->flags & SER_RS485_ENABLED) {
/* Enable auto RS-485 RTS mode */
modem |= UARTMODEM_TXRTSE;