linux-kernel - Re: [PATCH] ARM: EXYNOS: Consolidate multiple low-level UART port definitions

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Date:	Fri, 31 May 2013 08:28:16 +0530
From:	Tushar Behera <tushar.behera@...aro.org>
To:	Olof Johansson <olof@...om.net>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
	Patch Tracking <patches@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>
Subject: Re: [PATCH] ARM: EXYNOS: Consolidate multiple low-level UART port
 definitions

On 05/31/2013 02:41 AM, Olof Johansson wrote:
> Hi,
> 
> On Wed, May 29, 2013 at 9:40 PM, Tushar Behera <tushar.behera@...aro.org> wrote:
>> There are two definitions for low-level UART ports for Exynos platform.
>> CONFIG_S3C_LOWLEVEL_UART_PORT is used for printing "Uncompressing
>> Linux... done, booting the kernel." and CONFIG_S3C_UART for other
>> low-level messages.
>>
>> The assumption for both the uart ports is that they are pre-configured
>> in the bootloader. Since they are essentially the same always, it
>> would be good to consolidate them to use only one macro, in this case
>> 'DEBUG_S3C_UART' would be a better option.
>>
>> 'DEBUG_S3C_UART' is defined only if DEBUG_LL is enabled. We can safely
>> disable this option when DEBUG_LL is not defined and we can boot various
>> boards with different UART port settings. Only drawback of this
>> approach is that when DEBUG_LL is not defined, we would be missing the
>> print "Uncompressing Linux... done, booting the kernel."
>>
>> Since CONFIG_S3C_LOWLEVEL_UART_PORT is still used by other Samsung
>> boards, the consolidation applies only for ARCH_EXYNOS.
>>
>> Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
> 
> This looks reasonable, but you have to convert the other samsung
> platforms too -- it's not ok to ignore them.
> 

Sure thing. I will update those platforms in a subsequent patchset.

> 
> -Olof
> 


-- 
Tushar Behera
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