[U-Boot] [PATCH v2 09/30] board_f: Add new function to allow runtime DTB selection

[Franklin S Cooper Jr]

On 05/23/2017 12:42 PM, Franklin S Cooper Jr wrote:
> Runtime U-boot dtb selection is generally a two step process. First step
> is to simply use an initial generic dtb. The second step is to select
> the dtb and perhaps execute additional code ones U-boot knows what board
> it is running on. Embedded_dtb_select handles the second step by allowing
> board specific code to run and perform what ever necessary configuration
> that is needed.
> 
> Signed-off-by: Franklin S Cooper Jr <fcooper at ti.com>
> ---
>  common/Kconfig   | 10 ++++++++++
>  common/board_f.c |  3 +++
>  include/common.h |  4 ++++
>  3 files changed, 17 insertions(+)
> 
> diff --git a/common/Kconfig b/common/Kconfig
> index 2429953..b6327f0 100644
> --- a/common/Kconfig
> +++ b/common/Kconfig
> @@ -421,6 +421,16 @@ config SYS_STDIO_DEREGISTER
>  
>  endmenu
>  
> +config DTB_RESELECT
> +	bool "Support swapping dtbs at a later point in boot"
> +	depends on FIT_EMBED
> +	default n

I will be sending a new rev. I missed dropping the above statement based
on the rev 1 comment.
> +	help
> +	  It is possible during initial boot you may need to use a generic
> +	  dtb until you can fully determine the board your running on. This
> +	  config allows boards to implement a function at a later point
> +	  during boot to switch to the "correct" dtb.
> +
>  config FIT_EMBED
>  	bool "Support a FIT image embedded in the U-boot image"
>  	default n
> diff --git a/common/board_f.c b/common/board_f.c
> index a212f2b..b383239 100644
> --- a/common/board_f.c
> +++ b/common/board_f.c
> @@ -759,6 +759,9 @@ static const init_fnc_t init_sequence_f[] = {
>  #if defined(CONFIG_DISPLAY_CPUINFO)
>  	print_cpuinfo,		/* display cpu info (and speed) */
>  #endif
> +#if defined(CONFIG_DTB_RESELECT)
> +	embedded_dtb_select,
> +#endif
>  #if defined(CONFIG_DISPLAY_BOARDINFO)
>  	show_board_info,
>  #endif
> diff --git a/include/common.h b/include/common.h
> index 45f190a..ebc716e 100644
> --- a/include/common.h
> +++ b/include/common.h
> @@ -478,6 +478,10 @@ void	pci_init_board(void);
>  #endif
>  #endif
>  
> +#if defined(CONFIG_DTB_RESELECT)
> +int	embedded_dtb_select(void);
> +#endif
> +
>  int	misc_init_f   (void);
>  int	misc_init_r   (void);
>  
>