Re: [DistroKit] [PATCH] doc: v8a: ROCK 3A: add documentation on writing barebox-only images to SD-Card and NOR Flash

[Roland Hieber <rhi@pengutronix.de>]

On Fri, Mar 24, 2023 at 07:29:52PM +0100, Johannes Zink wrote:
> It may be useful to sometimes only write a barebox image to SD-Card,
> e.g. for chainloading, TFTP-Boot or if Android Fastboot is used for
> flashing the actual full image to a storage medium. Add documentation
> on which image to use.
> 
> Also add a short section about how to write barebox to the fallback
> NOR SPI Flash on the ROCK 3A board.
> 
> Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
> ---
>  doc/hardware_v8a_rock3a.rst | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/doc/hardware_v8a_rock3a.rst b/doc/hardware_v8a_rock3a.rst
> index 75acd4d84613..3aa5a62ea8bd 100644
> --- a/doc/hardware_v8a_rock3a.rst
> +++ b/doc/hardware_v8a_rock3a.rst
> @@ -5,7 +5,11 @@ Boot Media
>  ----------
>  
>  Copy the image ``platform-v8a/images/rock3a.img`` onto a microSD card. Put the
> -microSD card into the Rock 3A and boot it.
> +microSD card into the Rock 3A and boot it, the system will autoboot to linux.
> +
> +If you just want to boot to barebox instead of a full linux image from microSD card
> +(e.g. for chainloading or tftpboot),
> +copy the image ``platform-v8a/images/barebox-rock3a.norimg`` onto a microSD card instead.

Hmm, "copy" could be misread as "cp" instead of "dd" here, which will
not work… But that happens on more than just this one occurrence, I'll
send a new patch.

 - Roland

>  Alternatively, you may put the Rock 3A into MASKROM mode following the `Rock 3
>  Hardware User Manual <https://wiki.radxa.com/Rock3/hardware/3a>`_ and boot
> @@ -19,6 +23,10 @@ Once Barebox is booted, copy the image ``platform-v8a/images/rock3a.img`` via
>  tftp or NFS to the eMMC to persist it. Disable MASKROM mode and reboot the
>  board to start from eMMC.
>  
> +Once booted to linux, you can write ``platform-v8a/images/barebox-rock3a.norimg`` using mtd-utils
> +to the NOR flash, which can then be used as fallback boot source whenever booting from microSD
> +card or eMMC fails.
> +
>  Serial Console
>  --------------
>  
> -- 
> 2.30.2
> 
> 
> 

-- 
Roland Hieber, Pengutronix e.K.          | r.hieber@pengutronix.de     |
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