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

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Message-ID: <51ADB6A9.8030006@linaro.org>
Date:	Tue, 04 Jun 2013 15:13:05 +0530
From:	Tushar Behera <tushar.behera@...aro.org>
To:	Kevin Hilman <khilman@...aro.org>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, arnd@...db.de,
	patches@...aro.org, kgene.kim@...sung.com, olof@...om.net
Subject: Re: [PATCH] ARM: EXYNOS: Consolidate multiple low-level UART port
 definitions

On 05/31/2013 11:50 PM, Kevin Hilman wrote:
> Tushar Behera <tushar.behera@...aro.org> writes:
> 
>> 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."
> 
> Perfectly acceptable to me (and already the case on OMAP.)
> 
>> 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>
> 
> Acked-by: Kevin Hilman <khilman@...aro.org>
> 

Thanks Kevin.

I have an updated version of this patch updated for all of Samsung
platforms.[1]

[1] http://www.gossamer-threads.com/lists/linux/kernel/1723429

-- 
Tushar Behera
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