[U-Boot] [PATCH] Save environment data to mmc.

[Stefano Babic <sbabic@denx.de>]

Terry Lv wrote:
> This patch is to save environment data to mmc card.
> It uses interfaces defined in generic mmc.

Hi Terry,

> 
> Signed-off-by: Terry Lv <r65388@freescale.com>
> ---
>  arch/arm/lib/board.c     |   10 ++--
>  arch/powerpc/lib/board.c |   12 ++--
>  common/Makefile          |    1 +
>  common/cmd_nvedit.c      |    1 +
>  common/env_mmc.c         |  154 ++++++++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 167 insertions(+), 11 deletions(-)
>  create mode 100644 common/env_mmc.c

Could you set a version of your patch (something like [PATCH V*] in the
subject, so it is easier to track changes ? This is the third version,
but it is difficult to get it without searching in archive.

> 
> diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
> index f5660a9..f62e0eb 100644
> --- a/arch/arm/lib/board.c
> +++ b/arch/arm/lib/board.c
> @@ -347,6 +347,11 @@ void start_armboot (void)
>  	dataflash_print_info();
>  #endif
>  
> +#ifdef CONFIG_GENERIC_MMC
> +	puts ("MMC:   ");
> +	mmc_initialize (gd->bd);
> +#endif
> +
>  	/* initialize environment */
>  	env_relocate ();
>  
> @@ -419,11 +424,6 @@ extern void davinci_eth_set_mac_addr (const u_int8_t *addr);
>  	board_late_init ();
>  #endif
>  
> -#ifdef CONFIG_GENERIC_MMC
> -	puts ("MMC:   ");
> -	mmc_initialize (gd->bd);
> -#endif
> -
>  #ifdef CONFIG_BITBANGMII
>  	bb_miiphy_init();
>  #endif

Because it is required to move the initialization of the mmc before
env_relocate(), we need probably to advise that there are some
consequences. If someone implements the mmc support in board_late_init()
(setting a pin multiplexer or something like that, for example), it does
not work. I think we should at least write a comment to advise that the
mmc/sd controller should work after board_init() is called.
However, after a quick check in the arm boards, I have not found a board
that is initializing the mmc controller in board_late_init(). Not sure
for powerpc.

> diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
> index eb89e9e..78f75fb 100644
> --- a/common/cmd_nvedit.c
> +++ b/common/cmd_nvedit.c
> @@ -59,6 +59,7 @@ DECLARE_GLOBAL_DATA_PTR;
>      !defined(CONFIG_ENV_IS_IN_FLASH)	&& \
>      !defined(CONFIG_ENV_IS_IN_DATAFLASH)	&& \
>      !defined(CONFIG_ENV_IS_IN_MG_DISK)	&& \
> +    !defined(CONFIG_ENV_IS_IN_MMC)  && \
>      !defined(CONFIG_ENV_IS_IN_NAND)	&& \
>      !defined(CONFIG_ENV_IS_IN_NVRAM)	&& \
>      !defined(CONFIG_ENV_IS_IN_ONENAND)	&& \