[U-Boot] [PATCH 1/1]: add nand_bootupdate for i.MX6 and likes

[Jagan Teki]

+ Scott

On Thu, Oct 6, 2016 at 1:27 AM, Sergey Kubushyn <ksi at koi8.net> wrote:
> This one adds nand_bootupdate command for i.MX6 and similar MCUs. It
> generates proper NAND boot structures (FCB, DBBT, etc) and writes those
> along with U-Boot mx image to where they belong so system would be able
> to boot off of raw NAND.
>
> As of now the only way to do it is by using user-space kobs-ng utility
> that has lots of unnecessary bells and whistles and only runs from
> Linux so it is impossible to update raw NAND U-Boot from U-Boot itself.
>
> It does not give any choice for the actual data placement in NAND but
> that is done deliberately -- there is no reason to put it anywhere but
> the only location i.MX6 Boot ROM expects it to be.
>
> This is my THIRD attempt to get it into the main U-Boot tree. I do
> really hope it would get applied before I retire.
>
> Signed-off-by: Sergey Kubushyn <ksi at koi8.net>
> ---
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -571,6 +571,16 @@ config CMD_TIME
>         help
>           Run commands and summarize execution time.
>
> +config CMD_NAND_BOOTUPDATE
> +       bool "Update NAND bootloader on iMX6 and its brethen"
> +       depends on ARCH_MX6 && NAND_BOOT && CMD_NAND
> +       help
> +         Having iMX6 NAND U-Boot image in memory creates all necessary
> +         structures and writes those where they belong along with that
> +         U-Boot image so system is able to boot off of raw NAND. Kinda
> +         like kobs-ng utility but simpler.
> +
> +
>  # TODO: rename to CMD_SLEEP
>  config CMD_MISC
>         bool "sleep"
>
> --- a/drivers/mtd/nand/Makefile
> +++ b/drivers/mtd/nand/Makefile
> @@ -67,6 +67,7 @@ obj-$(CONFIG_NAND_OMAP_GPMC) += omap_gpmc.o
>  obj-$(CONFIG_NAND_OMAP_ELM) += omap_elm.o
>  obj-$(CONFIG_NAND_PLAT) += nand_plat.o
>  obj-$(CONFIG_NAND_SUNXI) += sunxi_nand.o
> +obj-$(CONFIG_CMD_NAND_BOOTUPDATE) += mxs_nand_bootupdate.o

The command macro couldn't be part of drivers. and also this isn't a
common code or separate driver try to add the most of the code in cmd/
if possible separate file (as it is specific to imx) and if something
needed to write on drivers/nand better to add in mxc or mxs driver.

Jagan.