linux-kernel - [PATCH] serial: imx: restore handshaking irq for imx1

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Message-Id: <20180920121117.19041-1-u.kleine-koenig@pengutronix.de>
Date:   Thu, 20 Sep 2018 14:11:17 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Cc:     YueHaibing <yuehaibing@...wei.com>, linux-serial@...r.kernel.org,
        kernel@...gutronix.de, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Leonard Crestez <leonard.crestez@....com>,
        Andy Duan <fugang.duan@....com>
Subject: [PATCH] serial: imx: restore handshaking irq for imx1

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-koenig@...gutronix.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