I’m familiar with the method for applying config fragments to change the u-boot
settings from within petalinux. I tried the very simple approach that I think
should work. As a basic test I’m trying to set the bootdelay to 0. I added the
following to my layer:
recipes-bsp/
└── u-boot
├── files
│ └── u-boot-redux.cfg
└── u-boot-xlnx_%.bbappend
The contents of u-boo-xlnx_%.bbappend are:
FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
SRC_URI:append = " \
file://u-boot-redux.cfg \
"
do_notify_configure () {
bbplain "Applying u-boot-xlnx config overrides"
}
addtask notify_configure before do_configure
And the contents of u-boot-redux.cfg are:
CONFIG_BOOTDELAY=0
When I build u-boot I see my message “Applying u-boot-xlnx config overrides”,
and when I grep the .config file for BOOTDELAY, I do see the change applied
correctly. However when I boot, I still observe a boot countdown, and when I
run:
printenv
in u-boot, I see bootdelay=2.
So I tried many other things. Including:
Adding the bootdelay=0 to uEnv.txt
Making a platform-top.h with my own definition of CONFIG EXTRA_ENV_SETTINGS and
following the pattern of the petalinux style u-boot-xlnx %.bbappend
Enabling
CONFIG_USE_DEFAULT_ENV_FILE=y
CONFIG_DEFAULT_ENF_FILE="my-uEnv.txt"
as shown in this stackoverflow post:
https://stackoverflow.com/questions/69587517/how-to-provide-the-u-boot-default-environment-from-a-file-in-yocto
Unfortunately I have had no luck in actually getting the changes to take
effect. So I must be missing some key point in the design pattern.
Thanks for any help that you can provide to shed light on this.
-David
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