dt: remove of_alias_get_id() reference

of_alias_get_id() is broken and being reverted.  Remove the reference
to it and replace with a single incrementing id number.

There is no risk of regression here on the imx driver since the imx
change to use of_alias_get_id() is commit 22698aa2, "serial/imx: add
device tree probe support" which is new for v3.1, and it won't get
used unless CONFIG_OF is enabled and the board is booted using a
device tree.  A single incrementing integer is sufficient for now.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Shawn Guo <shawn.guo@linaro.org>

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 827db76..7e91b3d 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1286,22 +1286,17 @@ 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;
 
-       ret = of_alias_get_id(np, "serial");
-       if (ret < 0) {
-               pr_err("%s: failed to get alias id, errno %d\n",
-                       __func__, ret);
-               return -ENODEV;
-       } else {
-               sport->port.line = ret;
-       }
+       sport->port.line = portnum++;
+       if (sport->port.line >= UART_NR)
+               return -EINVAL;
 
        if (of_get_property(np, "fsl,uart-has-rtscts", NULL))
                sport->have_rtscts = 1;