[U-Boot] [RFC PATCH 09/10] sunxi: Transition from the MMC to a FAT-based environment

[Lukasz Majewski]

On Thu, 16 Nov 2017 10:22:30 +0100
Maxime Ripard <maxime.ripard at free-electrons.com> wrote:

> The current environment has been hardcoded to an offset that starts
> to be an issue given the current size of our main U-Boot binary.
> 
> By implementing a custom environment location routine, we can always
> favor the FAT-based environment, and fallback to the MMC if we don't
> find something in the FAT partition. We also implement the same order
> when saving the environment, so that hopefully we can slowly migrate
> the users over to FAT-based environment and away from the raw MMC one.
> 
> Eventually, and hopefully before we reach that limit again, we will
> have most of our users using that setup, and we'll be able to retire
> the raw environment, and gain more room for the U-Boot binary.
> 
> Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
> ---
>  board/sunxi/board.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/board/sunxi/board.c b/board/sunxi/board.c
> index dcacdf3e626d..8891961dcc6b 100644
> --- a/board/sunxi/board.c
> +++ b/board/sunxi/board.c
> @@ -173,6 +173,22 @@ void i2c_init_board(void)
>  #endif
>  }
>  
> +#if defined(CONFIG_ENV_IS_IN_MMC) && defined(CONFIG_ENV_IS_IN_FAT)
> +enum env_location env_get_location(enum env_operation op, int prio)
> +{
> +	switch (prio) {
> +	case 0:
> +		return ENVL_FAT;
> +
> +	case 1:
> +		return ENVL_MMC;
> +
> +	default:
> +		return ENVL_UNKNOWN;
> +	}
> +}
> +#endif
> +
>  /* add board specific code here */
>  int board_init(void)
>  {

Reviewed-by: Lukasz Majewski <lukma at denx.de>

Best regards,

Lukasz Majewski

--

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