From: Shenwei Wang <shenwei.wang@xxxxxxx>
[ Upstream commit 3957b9501a5a8fa709ae4a47483714491471f6db ]
The previous 'commit 846651eca073 ("serial: fsl_lpuart: RS485 RTS
polariy is inverse")' only fixed the inverse issue on lpuart 8bit
platforms.
This is a follow-up patch to fix the RS485 polarity inverse
issue on lpuart 32bit platforms.
Fixes: 03895cf41d18 ("tty: serial: fsl_lpuart: Add support for RS-485")
Reported-by: Sherry Sun <sherry.sun@xxxxxxx>
Signed-off-by: Shenwei Wang <shenwei.wang@xxxxxxx>
Link: https://lore.kernel.org/r/20230207162420.3647904-1-shenwei.wang@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/tty/serial/fsl_lpuart.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 08096d33af8a6..f4d9dc4648da4 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1406,9 +1406,9 @@ static int lpuart32_config_rs485(struct uart_port *port,
* Note: UART is assumed to be active high.
*/
if (rs485->flags & SER_RS485_RTS_ON_SEND)
- modem &= ~UARTMODEM_TXRTSPOL;
- else if (rs485->flags & SER_RS485_RTS_AFTER_SEND)
modem |= UARTMODEM_TXRTSPOL;
+ else if (rs485->flags & SER_RS485_RTS_AFTER_SEND)
+ modem &= ~UARTMODEM_TXRTSPOL;
}
/* Store the new configuration */
--
2.39.2
