[U-Boot] [PATCH v2 4/7] tegra: Allow boards to perform early GPIO setup

[Stephen Warren <swarren@wwwdotorg.org>]

On 05/25/2012 07:46 AM, Thierry Reding wrote:
> The new gpio_early_init() function, which does nothing by default, can
> be overridden by boards to configure GPIOs at an early stage.

> diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c

>  int board_early_init_f(void)
>  {
>  	board_init_uart_f();
>  
>  	/* Initialize periph GPIOs */
> +	gpio_early_init();
>  #ifdef CONFIG_SPI_UART_SWITCH
>  	gpio_early_init_uart();
>  #else

I assert that all early GPIO initialization should be reworked to use
this new gpio_early_init(). In other words, now that there's a single
generic gpio_early_init(), we should remove the following code right
after it:

#ifdef CONFIG_SPI_UART_SWITCH
        gpio_early_init_uart();
#else
        gpio_config_uart();
#endif

and any boards that need to do any of that (which is just Seaboard I
think) should do that from an implementation of the new generic
gpio_early_init() in their board file. That way, common code won't have
to know about crap like the SPI/UART muxing on Seaboard.

That said, this need not be part of this patch or even this series, so I
don't mean to nak this patch with these comments.

And actually, I'd be all for ripping out all the SPI support on Seaboard
and all related code anyway...