[U-Boot] [PATCH] pico-imx6ul, pico-imx7d: Explain how to use eMMC user partition

[Otavio Salvador]

On Fri, Mar 22, 2019 at 2:40 PM Fabio Estevam <festevam at gmail.com> wrote:
> On Fri, Mar 22, 2019 at 9:28 AM Otavio Salvador <otavio at ossystems.com.br> wrote:
> >  2. Flashing U-Boot into the eMMC
> >
> > -Run the DFU agent so we can flash the new images using dfu-util tool:
> > +The  default  U-Boot   environment  expects  the  use   of  eMMC  user
> > +partition. To ensure we are using  the proper eMMC partition for boot,
> > +please run:
> > +
> > +=> mmc partconf 0 0 0 0
> > +
> > +Next, un the DFU agent so we can flash the new images using dfu-util
>
> Typo: it should be "run" instead of "un"
>
> I tested the instructions and it did not work for me. After I ran
> these steps I still got the old U-Boot on the eMMC.
>
> The procedure that worked here is:
>
> => dfu 0 mmc 0
> Flash SPL
> => dfu 0 mmc 0
> Flash U-Boot proper
>
> => mmc partconf 0 0 0 0
> => saveenv

I sent a v2.

The order is:

Use the default environment variables:

=> env default -f -a
=> saveenv

To ensure we are using  the proper eMMC partition for boot, please run:

=> mmc partconf 0 0 0 0

Next, run the DFU agent so we can flash the new images using dfu-util tool:

=> dfu 0 mmc 0

Flash SPL and u-boot-dtb.img into the eMMC running the following
commands on a PC:

$ sudo dfu-util -D SPL -a spl
$ sudo dfu-util -D u-boot-dtb.img -a u-boot

The environment setup but be run using the current U-Boot as it has
the dfu_alt_info which needs to be used. Please try this sequence and
see if it works for you.

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
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