[U-Boot] flashing CHIP with 2016.03 (or master)

[Maxime Ripard <maxime.ripard@free-electrons.com>]

Hi Trevor,

On Mon, Oct 03, 2016 at 02:01:03AM -0400, Trevor Woerner wrote:
> Hi,
> 
> Today I built an image for the CHIP using OE and was able to flash it to the
> CHIP board. I was a bit disappointed to find
> https://github.com/NextThingCo/CHIP-u-boot is from a year ago and
> https://github.com/NextThingCo/CHIP-linux is 4.2 from Aug 2015.

You should look closer, we have 2016.01 and 4.4 based branches, which
are the production images.

> Marek suggested I try u-boot's master branch since it includes
> support for the CHIP.  So I changed my build to use the current
> u-boot recipe in OE (which builds 2016.03 or
> df61a74e6845ec9bdcdd48d2aff5e9c2c6debeaa) and configured it to use
> configs/CHIP_defconfig.
> 
> The CHIP's flashing procedure creates a u-boot script
> (https://github.com/NextThingCo/CHIP-tools/blob/chip/stable/chip-fel-flash.sh#L86)
> which calls u-boot's "nand" procedure. The "nand" command is not built/enabled
> in u-boot master for CHIP. Tweaking the CHIP_defconfig to enable it causes a
> build failure.
> 
> My guess is this is something to keep the user from bricking their device?
> So I guess I either have to figure out how to merge NextThing's nand code
> into master, or I would need to figure out how to flash the CHIP without this
> procedure?

I guess you just found out why we don't have a newer U-Boot?

We still have a bunch of changes that are not upstreamed. The biggest
one being the NAND support, which has a dependency on Linux, which is
also being worked on.

http://lists.infradead.org/pipermail/linux-mtd/2016-April/067322.html

And you're in the same situation with Linux, the NAND support is
missing.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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