[U-Boot] [PATCH 1/1] board/ti/am335x/README: Document NAND programming

[Scott Wood <scottwood@freescale.com>]

On 07/17/2013 11:24:30 AM, Tom Rini wrote:
> The AM335x GP EVM ships with NAND.  Document programming of the chip
> including the redundant locations that the ROM will check.
> 
> Signed-off-by: Tom Rini <trini@ti.com>
> ---
>  board/ti/am335x/README |   25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/board/ti/am335x/README b/board/ti/am335x/README
> index ccc5e16..3444d7e 100644
> --- a/board/ti/am335x/README
> +++ b/board/ti/am335x/README
> @@ -13,6 +13,31 @@ documented in TI's reference designs:
>  - AM335x EVM SK
>  - Beaglebone White
>  - Beaglebone Black
> +'
> +NAND
> +====
> +
> +The AM335x GP EVM ships with a 256MiB NAND available in most  
> profiles.  In
> +this example to program the NAND we assume that an SD card has been
> +inserted with the files to write in the first SD slot and that  
> mtdparts
> +have been configured correctly for the board.  As a time saving  
> measure we
> +load MLO into memory in one location, copy it into the three  
> locatations
> +that the ROM checks for additional valid copies, then load U-Boot  
> into
> +memory.  We then write that whole section of memory to NAND.
> +
> +U-Boot # mmc rescan
> +U-Boot # env default -f -a
> +U-Boot # nand erase.chip
> +U-Boot # saveenv
> +U-Boot # load mmc 0 81000000 MLO
> +U-Boot # cp.b 81000000 81020000 20000
> +U-Boot # cp.b 81000000 81040000 20000
> +U-Boot # cp.b 81000000 81060000 20000
> +U-Boot # load mmc 0 81080000 u-boot.img
> +U-Boot # nand write 81000000 0 260000
> +U-Boot # load mmc 0 ${loadaddr} uImage
> +U-Boot # nand erase.part kernel
> +U-Boot # nand write ${loadaddr} kernel 500000

You've already done a "nand erase.chip"...  Why do you need to erase  
"kernel" again?

-Scott