Subject: [PATCH resend] serial: of-serial: fetch line number from DT

From: [email-masked] (Sergei Shtylyov)
Date: Tue, 25 Nov 2014 17:24:48 +0300

Hello.

On 11/25/2014 11:26 AM, Lucas Stach wrote:

> The general agreed way to specify a fixed line number
> for a serial console is to provide a "serial" alias
> in the devicetree. Start parsing this property in
> of_serial.

> Signed-off-by: Lucas Stach <[email-masked]>
> Acked-by: Olof Johansson <[email-masked]>
> ---
> As 3.16-rc6 landed the fix to avoid the regression that this patch
> was causing on Tegra it should be safe to reapply it.
> ---
>   drivers/tty/serial/of_serial.c | 4 ++++
>   1 file changed, 4 insertions(+)

> diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
> index 8bc2563..920a831 100644
> --- a/drivers/tty/serial/of_serial.c
> +++ b/drivers/tty/serial/of_serial.c
> @@ -101,6 +101,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
>   	if (of_property_read_u32(np, "fifo-size", &prop) == 0)
>   		port->fifosize = prop;
>
> +	/* Check for a fixed line number */
> +	if ((ret = of_alias_get_id(np, "serial")) >= 0)

    Don't use assignment in the *if* statement. If you would have ran your 
patch thru scripts/checkpatch.pl, it would have complained about that.

> +		port->line = ret;
> +

WBR, Sergei