diff options
| author |   Lukas Wunner <lukas@wunner.de> | 2022-09-11 11:12:15 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-22 16:43:05 +0200 |
| commit | 3a939433ddc1bab98be028903aaa286e5e7461d7 (patch) | |
| tree | 25c9b05d181f6a2f35ca8446043cf10593430db0 /drivers/tty/serial | |
| parent | tty: serial: atmel: Use FIELD_PREP/FIELD_GET (diff) | |
| download | wireguard-linux-3a939433ddc1bab98be028903aaa286e5e7461d7.tar.xz wireguard-linux-3a939433ddc1bab98be028903aaa286e5e7461d7.zip | |
serial: ar933x: Deassert Transmit Enable on ->rs485_config()
The ar933x_uart driver neglects to deassert Transmit Enable when
->rs485_config() is invoked. Fix it.
Fixes: 9be1064fe524 ("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>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/ar933x_uart.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 0a4020dba165..925484a42c82 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -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; } |