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 8deaf2ad8b34ac4bafeb795a5f5a8e4dc5faf345..4e827e5a52a364162055e4856305f6fec9b7fd19 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2213,6 +2213,14 @@ 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);