[PATCH] serial: imx: restore handshaking irq for imx1

[Uwe Kleine-König]

Back in 2015 when irda was dropped from the driver imx1 was broken. This
change reintroduces the support for the third interrupt of the UART.

Fixes: afe9cbb1a6ad ("serial: imx: drop support for IRDA")
Signed-off-by: Uwe Kleine-König <u.kleine-koe...@pengutronix.de>
---
 drivers/tty/serial/imx.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 4e853570ea80..554a69db1bca 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2350,6 +2350,14 @@ static int imx_uart_probe(struct platform_device *pdev)
                                ret);
                        return ret;
                }
+
+               ret = devm_request_irq(&pdev->dev, rtsirq, imx_uart_rtsint, 0,
+                                      dev_name(&pdev->dev), sport);
+               if (ret) {
+                       dev_err(&pdev->dev, "failed to request rts irq: %d\n",
+                               ret);
+                       return ret;
+               }
        } else {
                ret = devm_request_irq(&pdev->dev, rxirq, imx_uart_int, 0,
                                       dev_name(&pdev->dev), sport);
-- 
2.18.0