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serial: ar933x: Deassert Transmit Enable on ->rs485_config()

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The ar933x_uart driver neglects to deassert Transmit Enable when
->rs485_config() is invoked.  Fix it.

Fixes: 9be1064fe5 ("serial: ar933x_uart: add RS485 support")
Cc: stable@vger.kernel.org # v5.7+
Cc: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/r/5b36af26e57553f084334666e7d24c7fd131a01e.1662887231.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lukas Wunner 2022-09-11 11:12:15 +02:00 committed by Greg Kroah-Hartman
parent f73db49650
commit 3a939433dd
1 changed files with 7 additions and 0 deletions
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7
drivers/tty/serial/ar933x_uart.c
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@ -583,6 +583,13 @@ static const struct uart_ops ar933x_uart_ops = {
static int ar933x_config_rs485(struct uart_port *port, struct ktermios *termios,
struct serial_rs485 *rs485conf)
{
struct ar933x_uart_port *up =
container_of(port, struct ar933x_uart_port, port);
if (port->rs485.flags & SER_RS485_ENABLED)
gpiod_set_value(up->rts_gpiod,
!!(rs485conf->flags & SER_RS485_RTS_AFTER_SEND));
return 0;
}