serial: imx: restore handshaking irq for imx1

BugLink: https://bugs.launchpad.net/bugs/1836287
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>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 84fcaa74f1c58ce921c07fec924ac61f814dde21..c9d86d70cedc65ad1b3f4a2e8949c6b28420e706 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2176,6 +2176,14 @@ static int serial_imx_probe(struct platform_device *pdev)
                                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);