[U-Boot] [PATCH] env: Allow accessing non-mtd devices

[Lubomir Rintel]

On Thu, 2013-01-31 at 07:48 +0100, Wolfgang Denk wrote:
> Dear Lubomir Rintel,
> 
> In message <1359589584-19846-1-git-send-email-lkundrak at v3.sk> you wrote:
> > In certain cases, memory device is present as flat file or block device (via
> > mmc or mtdblock layer). Do not attempt MTD operations against it.
> 
> What exactly would be such cases?

Mine is a Kobo Mini e-book reader, which is basically Freescale MX50
with the only storage there being an MMC/SD card (removable from a slot
if disassembled), which contains uboot and its environment as well as
partition table, root and storage volume.

Apart from wiring a serial console, running fw_* tools seems to be about
the only way to modify kernel command line on that device. Also, I can
imagine that it would be useful to prepare a flat file image on a
different computer and copy it to the image afterwards.

> Please also make sure to run your patch through checkpatch - it
> catches a number of "space prohibited between function name and open
> parenthesis" warnings

I tried to stick with the coding style already present in the file. No
problem though, I'll follow up with an updated patch later.

> and tells you that your Signed-off-by: line is
> missing.

Noted, will fix.

Thank you!

Lubo