[U-Boot] ns16550: tegra: Specify debugging serial port at boot.

[Stephen Warren]

On 03/08/2012 11:39 AM, Wolfgang Denk wrote:
> Dear Stephen Warren,
> 
> In message <4F58F5B8.6070402 at wwwdotorg.org> you wrote:
>>
>> I noticed this patch isn't applied yet that I can find. Are there any
>> comments on it; can it be applied? Thanks.
>>
>> For reference, it's in patchwork at:
>> http://patchwork.ozlabs.org/patch/134712/
...
>>> diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
>>> @@ -62,6 +62,13 @@ void NS16550_init(NS16550_t com_port, int baud_divisor)
>>> +#if defined(CONFIG_TEGRA2)
>>> +	/*
>>> +	 * Put a 'D' in the scratchpad to let the kernel know which UART
>>> +	 * for earlyprintk [D]ebugging.
>>> +	 */
>>> +	serial_out('D', &com_port->spr);
>>> +#endif
> 
> I don't like to see such highly architecture specific stuff in common
> code, especially if it's such a dirty hack like this.

Would it help if we moved the this code to some Tegra-specific file
rather than the common serial port driver?