From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Gorsulowski <Daniel.Gorsulowski@esd.eu>
Date: Fri, 21 Jan 2011 12:17:57 +0100
Subject: [U-Boot] U-Boot support for board(s) meesc, otc570
In-Reply-To: <4D3963A8.8070202@emk-elektronik.de>
References: <20101127215828.7CD40220233A@lilith>	<4D072AED.6080703@esd.eu>	<4D355CFC.5050806@esd.eu>	<4D356200.5000801@aribaud.net>	<4D3577A9.8050505@esd.eu>	<4D3586D7.7040009@emk-elektronik.de>
	<4D37E8CE.5010404@esd.eu>	<4D392AFC.6080200@emk-elektronik.de>
	<4D394DDD.5020304@esd.eu> <4D3963A8.8070202@emk-elektronik.de>
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To: u-boot@lists.denx.de

Hello Reinhard,

Reinhard Meyer wrote:
> Dear Daniel Gorsulowski,
>> Today I found out by GPIO debugging, that U-Boot seems to boot but prints
>> its startup messages to wrong USART with proper baudrate. I'll try to
>> find out, why there is no output on DBGU.
> 
> Note that the USART to use is defined differently than before:
> 
> /* serial console */
> #define CONFIG_ATMEL_USART
> #define CONFIG_USART_BASE		ATMEL_BASE_DBGU
> #define	CONFIG_USART_ID			ATMEL_ID_SYS
> #define CONFIG_BAUDRATE			115200
> #define CONFIG_SYS_BAUDRATE_TABLE	{115200 , 19200, 38400, 57600, 9600 }

I did so, see http://lists.denx.de/pipermail/u-boot/2011-January/085863.html

But I'm a little bit confused. In the past, USART_ID was defined by '3',
if DBGU was used. Now, USART_ID is replaced by CONFIG_USART_ID, which is
defined by ATMEL_ID_SYS, which is defined by '1'.
However, this discrepancy does not matter, because CONFIG_USART_ID is
only used once in drivers/serial/atmel_usart.c, line 57:
usart_hz = get_usart_clk_rate(USART_ID);
And get_usart_clk_rate(); ignores its parameter. See
arch/arm/include/asm/arch-at91/clk.h
static inline unsigned long get_usart_clk_rate(unsigned int dev_id)
{
        return get_mck_clk_rate();
}
(all other functions in clk.h act similar. I think, a rework would be
advisable?)

Back to the problem...
In my opinion, my USART configuration is correct. I still have no idea,
why there is no output on DBGU.

> 
> Best Regards,
> Reinhard

Regards,
Daniel