[U-Boot] [PATCH] warp: Add a README file

[Fabio Estevam]

Hi Otavio,

On Mon, Mar 2, 2015 at 11:52 AM, Otavio Salvador
<otavio at ossystems.com.br> wrote:

>> +Required software on the host PC:
>> +
>> +- imx_loader: https://github.com/warpboard/imx_usb_loader
>
> I see no reason to link WaRP's fork. The Boundary Devices upstream
> code offers a more up to date bases and I think we should give them
> the credit for the tool. Mind to change it?

No problem for me to link Boundary Device's tree, but then we would
need to create a mx6sl_usb_work.conf in this tree, so that the
LOADADDR could be adapted for mx6sl. Then we also need to pass
mx6sl_usb_work.conf
in the imx_usb command line.

Eric,

What do you think?

>> +Load u-boot.imx via USB:
>> +
>> +$ sudo ./imx_usb
>
> $ sudo ./imx_usb <path to u-boot.imx>

It worked for me without the extra arg, but I can pass the arg in this
Howto to make it clearer.

>
>> +
>> +Then U-boot should start and its messages will appear in the console program.
>> +
>> +Use the default environment variables:
>> +
>> +=> env default -f -a
>> +=> save
>
> I think this is not needed as the environment will be rewritten when
> the U-Boot is overridden.

I tested it and the env ins not overwritten, so we need to explicitly
overwrite the envs in order to have the correct dfu_alt_info variable
for DFU to work.

Regards,

Fabio Estevam