diff options
| author | Lukas Wunner <lukas@wunner.de> | 2022-11-05 16:46:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-10 20:14:14 +0300 |
| commit | 028fcabd8a67196277f907c8ecce8e0bb99b276a (patch) | |
| tree | e30b21ada0b4297a1cc426983f66dc1fdc373726 /drivers | |
| parent | e6da7808c955e609b3adf9d18b02f94463616016 (diff) | |
| download | linux-028fcabd8a67196277f907c8ecce8e0bb99b276a.tar.xz | |
serial: ar933x: Deassert Transmit Enable on ->rs485_config()
commit 3a939433ddc1bab98be028903aaa286e5e7461d7 upstream.
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 JÀrvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/ar933x_uart.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index c2be7cf91399..fcbaff894193 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -593,6 +593,11 @@ static int ar933x_config_rs485(struct uart_port *port, dev_err(port->dev, "RS485 needs rts-gpio\n"); return 1; } + + if (rs485conf->flags & SER_RS485_ENABLED) + gpiod_set_value(up->rts_gpiod, + !!(rs485conf->flags & SER_RS485_RTS_AFTER_SEND)); + port->rs485 = *rs485conf; return 0; } |