serial: fsl_lpuart: Fill in rs485_supported

[ Upstream commit 07481f448b635d7cebb92d5940f5bea5c4395a26 ]

Add information on supported serial_rs485 features.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220606100433.13793-16-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 76bad3f88750 ("tty: serial: fsl_lpuart: don't break the on-going transfer when global reset")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 44ed428..1d13d88 100644 (file)
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2644,6 +2644,11 @@ static struct uart_driver lpuart_reg = {
        .cons           = LPUART_CONSOLE,
 };
 
+static const struct serial_rs485 lpuart_rs485_supported = {
+       .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND,
+       /* delay_rts_* and RX_DURING_TX are not supported */
+};
+
 static int lpuart_probe(struct platform_device *pdev)
 {
        const struct lpuart_soc_data *sdata = of_device_get_match_data(&pdev->dev);
@@ -2683,6 +2688,7 @@ static int lpuart_probe(struct platform_device *pdev)
                sport->port.rs485_config = lpuart32_config_rs485;
        else
                sport->port.rs485_config = lpuart_config_rs485;
+       sport->port.rs485_supported = &lpuart_rs485_supported;
 
        sport->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
        if (IS_ERR(sport->ipg_clk)) {