serial: imx: restore handshaking irq for imx1

commit 7e620984b62532783912312e334f3c48cdacbd5d upstream.

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")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 07ede982b4729bb0ff43f9cb8a0af5870fa7314a..f5f46c121ee392359285dfdaa91020dfd4539622 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1997,6 +1997,14 @@ static int serial_imx_probe(struct platform_device *pdev)
                                       dev_name(&pdev->dev), sport);
                if (ret)
                        return ret;
+
+               ret = devm_request_irq(&pdev->dev, rtsirq, imx_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_int, 0,
                                       dev_name(&pdev->dev), sport);