On Wed, Aug 10, 2022 at 05:09:45PM +0200, Francesco Dolcini wrote:
On Wed, Aug 10, 2022 at 10:34:26AM -0400, Tom Rini wrote:
On Tue, Aug 09, 2022 at 12:47:39PM +0200, Francesco Dolcini wrote:
Hello all, is there any kconfig mechanism in u-boot to append environment variable to the default one?
I am aware of CONFIG_USE_DEFAULT_ENV_FILE, but this will completely replace it, looking into the code I was not able to find anything, but I wonder if something from this https://lore.kernel.org/all/20211022030852.1986718-1-sjg@chromium.org/ can be used.
Yes, you can use the series above, which has been merged for some time, to append to the environment via board/../<board>/<board>.env and you can look at the existing .env files for examples of how it works.
Am I wrong or this just override the whole environment? My need here is to just add|override some env variables to the default env to an in-tree u-boot board from an out-of-tree configuration.
Think about a specific network or boot configuration, for example.
It doesn't override the whole environment. As of the link you posted, it did override all of (or rather, conflicted with) CONFIG_EXTRA_ENV_SETTINGS, but I changed that more recently as it was hindering adoption of the feature overall.