serial: fsl_lpuart: Call core's sanitization and remove custom one

Serial core handles serial_rs485 sanitization. Remove custom
sanitization from lpuart_config_rs485.

This change loses dev_err when SER_RS485_RX_DURING_TX is set due to
incorrect configuration. Other drivers do not do similar prinout for
full-duplex case and it should be done in serial core if it is
desirable to notify on this condition. Personally, I doesn't see it
important because the kernel gracefully downgrades to half-duplex.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220606100433.13793-31-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 88692dc..d35414c 100644 (file)
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1365,11 +1365,6 @@ static int lpuart_config_rs485(struct uart_port *port,
                ~(UARTMODEM_TXRTSPOL | UARTMODEM_TXRTSE);
        writeb(modem, sport->port.membase + UARTMODEM);
 
-       /* clear unsupported configurations */
-       rs485->delay_rts_before_send = 0;
-       rs485->delay_rts_after_send = 0;
-       rs485->flags &= ~SER_RS485_RX_DURING_TX;
-
        if (rs485->flags & SER_RS485_ENABLED) {
                /* Enable auto RS-485 RTS mode */
                modem |= UARTMODEM_TXRTSE;
@@ -1400,11 +1395,6 @@ static int lpuart32_config_rs485(struct uart_port *port,
                                & ~(UARTMODEM_TXRTSPOL | UARTMODEM_TXRTSE);
        lpuart32_write(&sport->port, modem, UARTMODIR);
 
-       /* clear unsupported configurations */
-       rs485->delay_rts_before_send = 0;
-       rs485->delay_rts_after_send = 0;
-       rs485->flags &= ~SER_RS485_RX_DURING_TX;
-
        if (rs485->flags & SER_RS485_ENABLED) {
                /* Enable auto RS-485 RTS mode */
                modem |= UARTMODEM_TXRTSE;
@@ -2723,13 +2713,6 @@ static int lpuart_probe(struct platform_device *pdev)
        if (ret)
                goto failed_get_rs485;
 
-       if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX)
-               dev_err(&pdev->dev, "driver doesn't support RX during TX\n");
-
-       if (sport->port.rs485.delay_rts_before_send ||
-           sport->port.rs485.delay_rts_after_send)
-               dev_err(&pdev->dev, "driver doesn't support RTS delays\n");
-
        uart_rs485_config(&sport->port);
 
        ret = devm_request_irq(&pdev->dev, sport->port.irq, handler, 0,