[U-Boot] [PATCH] ns16550: allow UART address to be set dynamically

[Tom Rini]

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On 12/13/12 05:27, Wolfgang Denk wrote:
> Dear Stephen Warren,
> 
> In message
> <1355354590-10023-1-git-send-email-swarren at wwwdotorg.org> you
> wrote:
>> From: Stephen Warren <swarren at nvidia.com>
>> 
>> A single U-Boot binary may support multiple very similar boards.
>> These boards may use different UARTs for the main debug console.
>> Hence, it is impossible to #define CONFIG_SYS_NS16550_COM1 to
>> some static UART address, since the true value may only be
>> determined at run-time, after identifying the actual hardware.
>> Provide an API for boards to call to set the actual address of
>> the UART, e.g. from spl_board_init() or board_early_init_f().
>> 
>> Signed-off-by: Stephen Warren <swarren at nvidia.com>
> 
> As is, this is just adding dead code.
> 
> Where would the device addresses come from - out of the device
> tree?

Board specific knowledge.  I'd be tempted to add UART3 (iirc) into the
am335x_evm default build so that we can support the Industrial DevKit
variant out of the box, rather than needing one of the other _uartN
builds.  We can tell which board we're on at run-time already.

- -- 
Tom
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