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

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

[Otavio Salvador]

The default U-Boot environment expects the use of eMMC user
partition. To ensure we are using the proper eMMC partition for boot
we need to run the `mmc partconf` command.

This patch updates the README instructions to avoid users to follow
misleading instructions.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
---

 board/technexion/pico-imx6ul/README | 9 ++++++++-
 board/technexion/pico-imx7d/README  | 9 ++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/board/technexion/pico-imx6ul/README b/board/technexion/pico-imx6ul/README
index bb8ee3f463..31f13d1b1d 100644
--- a/board/technexion/pico-imx6ul/README
+++ b/board/technexion/pico-imx6ul/README
@@ -50,7 +50,14 @@ Use the default environment variables:
 
 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
+tool:
 
 => dfu 0 mmc 0
 
diff --git a/board/technexion/pico-imx7d/README b/board/technexion/pico-imx7d/README
index 24eb97e82c..525b0a6aec 100644
--- a/board/technexion/pico-imx7d/README
+++ b/board/technexion/pico-imx7d/README
@@ -47,7 +47,14 @@ Use the default environment variables:
 
 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
+tool:
 
 => dfu 0 mmc 0
 
-- 
2.21.0

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

[Fabio Estevam]

Hi Otavio,

On Fri, Mar 22, 2019 at 9:28 AM Otavio Salvador <otavio@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

[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@gmail.com> wrote:
> On Fri, Mar 22, 2019 at 9:28 AM Otavio Salvador <otavio@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
Mobile: +55 (53) 9 9981-7854          Mobile: +1 (347) 903-9750