Re: [RFC PATCH] bootm: Register as bootentry provider

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On Mon, Jan 27, 2020 at 11:18:31AM +0100, Christian Eggers wrote:
> > Obviously anything involving shell scripts cannot work when no shell is
> > enabled. I suggest using bootloader spec (CONFIG_BLSPEC) to boot a
> > kernel. This works without shell support.
> 
> I would like to avoid using bootloader spec. The patch below works fine
> for me. Do you think that this (or something similar) can be added to
> barebox?
> 
> 
> Support for "boot <device>". This is required for using bootchooser with
> CONFIG_SHELL_NONE. In this case no boot scripts can be used, so the
> device name of the flash partition containing the kernel image has to
> provided.
> 
> Only enabled if CONFIG_BLSPEC is disabled.
> 
> Example: bootchooser.system0.boot=nand0.root.ubi.kernel0

you could leave bootchooser.system0.boot empty in which case bootchooser
tries to boot something called "system0".

Like in your patch below call bootentry_register_provider() from your
boardcode and put behind "system0" whatever you want.

I don't like interpreting a device name as a kernel image very much,
given that there's no possibility to also specify the devicetree and
commandline.

Another thing is that just enabling CONFIG_BLSPEC in a config shouldn't
prevent a board from booting. the "Only enabled if CONFIG_BLSPEC is
disabled" is not an option here.

Sascha

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