[U-Boot] [RFC PATCH v2 1/5] spl: dfu: add dfu support in SPL

[Tom Rini]

On Thu, Jul 21, 2016 at 08:23:13PM +0530, Ravi Babu wrote:

> Traditionally the DFU support is available only
> as part 2nd stage boot loader(u-boot) and DFU
> is not supported in SPL.
> 
> The SPL-DFU feature is useful for boards which
> does not have MMC/SD, ethernet boot mechanism
> to boot the board and only has USB inteface.
> 
> This patch add DFU support in SPL with RAM
> memory device support to load and execute u-boot.
> And then leverage full functionality DFU in
> u-boot to flash boot inital binary images to
> factory or bare-metal boards to memory devices
> like SPI, eMMC, MMC/SD card using USB interface.
> 
> This SPL-DFU support can be enabled through
> Menuconfig->Boot Images->Enable SPL-DFU support
> 
> Signed-off-by: Ravi Babu <ravibabu at ti.com>
> ---
>  Kconfig              |   27 +++++++++++++++++++++++++++
>  common/Makefile      |    1 +
>  common/command.c     |    2 +-
>  scripts/Makefile.spl |    4 ++++
>  4 files changed, 33 insertions(+), 1 deletion(-)
> 
> diff --git a/Kconfig b/Kconfig
> index ef12f9f..ed3e295 100644
> --- a/Kconfig
> +++ b/Kconfig
> @@ -336,6 +336,33 @@ config SPL_FIT_IMAGE_POST_PROCESS
>  	  injected into the FIT creation (i.e. the blobs would have been pre-
>  	  processed before being added to the FIT image).
>  
> +config SPL_DFU_SUPPORT
> +	bool "Enable SPL with DFU to load binaries to memory device"
> +	depends on USB && TARGET_DRA7XX_EVM

This seems needlessly restrictive.

> diff --git a/common/command.c b/common/command.c
> index e5d9b9c..d1c049c 100644
> --- a/common/command.c
> +++ b/common/command.c
> @@ -520,7 +520,7 @@ enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
>  	if (argc > cmdtp->maxargs)
>  		rc = CMD_RET_USAGE;
>  
> -#if defined(CONFIG_CMD_BOOTD)
> +#if defined(CONFIG_CMD_BOOTD) && !defined(CONFIG_SPL_BUILD)
>  	/* avoid "bootd" recursion */
>  	else if (cmdtp->cmd == do_bootd) {
>  		if (flag & CMD_FLAG_BOOTD) {

Why do we need this?

-- 
Tom
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