linux-kernel - Re: [PATCH v2 3/7] tty/serial: convert 8250 to generic earlycon

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Date:	Mon, 28 Apr 2014 19:56:54 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Rob Herring <robherring2@...il.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Catalin Marinas <catalin.marinas@....com>,
	Russell King <linux@....linux.org.uk>,
	Will Deacon <will.deacon@....com>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v2 3/7] tty/serial: convert 8250 to generic earlycon

On Mon, Apr 28, 2014 at 4:24 PM, Rob Herring <robherring2@...il.com> wrote:
> On Sat, Apr 26, 2014 at 1:29 AM, Yinghai Lu <yinghai@...nel.org> wrote:
>
> Thanks for finding these. I missed them in my build tests. This should fix them:
>
> diff --git a/drivers/tty/serial/8250/8250_early.c
> b/drivers/tty/serial/8250/8250_early.c
> index e83c9db..2094c3b 100644
> --- a/drivers/tty/serial/8250/8250_early.c
> +++ b/drivers/tty/serial/8250/8250_early.c
> @@ -156,6 +156,11 @@ static int __init early_serial8250_setup(struct
> earlycon_device *device,
>  EARLYCON_DECLARE(uart8250, early_serial8250_setup);
>  EARLYCON_DECLARE(uart, early_serial8250_setup);
>
> +int __init setup_early_serial8250_console(char *cmdline)
> +{
> +       return setup_earlycon(cmdline, "uart8250", early_serial8250_setup);
> +}
> +
>  int serial8250_find_port_for_earlycon(void)
>  {
>         struct earlycon_device *device = early_device;

that only handle "uart8250,", may need to add more lines to handle "uart,"

+int __init setup_early_serial8250_console(char *cmdline)
+{
+       char *options;
+       options = strstr(cmdline, "uart8250,");
+       if (options)
+               return setup_earlycon(cmdline, "uart8250",
early_serial8250_setup);
+
+       options = strstr(cmdline, "uart,");
+       if (options)
+              return setup_earlycon(cmdline, "uart", early_serial8250_setup);
+
+      return 0;
+}
+

Thanks

Yinghai
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