linux-kernel - Re: [PATCH] tty/serial: earlycon: Fix print for implied MMIO case

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Date:	Wed, 22 Oct 2014 14:48:33 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Kumar Gala <galak@...eaurora.org>
Cc:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] tty/serial: earlycon: Fix print for implied MMIO case

On Fri, Oct 17, 2014 at 10:01:11AM +0100, Kumar Gala wrote:
> For the case in which we just provide an address as an argument to the
> earlycon console type like:
> 
> earlycon=msm_serial_dm,0xf991e000

Personally it would be nice to see this when using pl011 as an earlyon.
Currently I get:

  Early serial console at I/O port 0x0 (options '')

With this patch I get:

  Early serial console at MMIO 0x7ff80000 (options '')

> We would report this as an IO port based mapping and not as MMIO.  Simple
> fix to use the port->iotype to decide which message to print.
> 
> Signed-off-by: Kumar Gala <galak@...eaurora.org>

Acked-by: Mark RUtland <mark.rutland@....com>

Thanks,
Mark.

> ---
>  drivers/tty/serial/earlycon.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
> index a514ee6..64fe25a 100644
> --- a/drivers/tty/serial/earlycon.c
> +++ b/drivers/tty/serial/earlycon.c
> @@ -98,7 +98,7 @@ static int __init parse_options(struct earlycon_device *device,
>  		strlcpy(device->options, options, length);
>  	}
>  
> -	if (mmio || mmio32)
> +	if (port->iotype == UPIO_MEM || port->iotype == UPIO_MEM32)
>  		pr_info("Early serial console at MMIO%s 0x%llx (options '%s')\n",
>  			mmio32 ? "32" : "",
>  			(unsigned long long)port->mapbase,
> -- 
> Qualcomm Innovation Center, Inc.
>  The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
>  a Linux Foundation Collaborative Project
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
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