serial/imx: add of_alias_get_id() reference back

As of_alias_get_id() gets fixed and ready for use, the patch adds the
of_alias_get_id() reference back to imx serial driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
[grant.likely: changed pr_err() to dev_err(), dropped unnecessary else]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 7e91b3d..9989877 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1286,17 +1286,20 @@ static int serial_imx_resume(struct platform_device *dev)
 static int serial_imx_probe_dt(struct imx_port *sport,
                struct platform_device *pdev)
 {
-       static int portnum = 0;
        struct device_node *np = pdev->dev.of_node;
        const struct of_device_id *of_id =
                        of_match_device(imx_uart_dt_ids, &pdev->dev);
+       int ret;
 
        if (!np)
                return -ENODEV;
 
-       sport->port.line = portnum++;
-       if (sport->port.line >= UART_NR)
-               return -EINVAL;
+       ret = of_alias_get_id(np, "serial");
+       if (ret < 0) {
+               dev_err(&pdev->dev, "failed to get alias id, errno %d\n", ret);
+               return -ENODEV;
+       }
+       sport->port.line = ret;
 
        if (of_get_property(np, "fsl,uart-has-rtscts", NULL))
                sport->have_rtscts = 1;