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serial: fsl_lpuart: fix RS485 RTS polariy inverse issue

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[ 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: 03895cf41d ("tty: serial: fsl_lpuart: Add support for RS-485")
Reported-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
Link: https://lore.kernel.org/r/20230207162420.3647904-1-shenwei.wang@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Shenwei Wang
2023-02-07 10:24:20 -06:00
committed by Greg Kroah-Hartman
parent 87674a359a
commit 3fe888ce81
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/fsl_lpuart.c
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@@ -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 */