Assuming you have created a BSP Layer using
yocto-bsp
and you added it to your
BBLAYERS
variable in the bblayers.conf
file, you can now use
the yocto-kernel
script to add patches and configuration
items to the BSP's kernel.
The yocto-kernel
script allows you to add, remove, and list patches
and kernel config settings to a BSP's kernel
.bbappend
file.
All you need to do is use the appropriate sub-command.
Recall that the easiest way to see exactly what sub-commands are available
is to use the yocto-kernel
built-in help as follows:
$ yocto-kernel --help Usage: Modify and list Yocto BSP kernel config items and patches. usage: yocto-kernel [--version] [--help] COMMAND [ARGS] Current 'yocto-kernel' commands are: config list List the modifiable set of bare kernel config options for a BSP config add Add or modify bare kernel config options for a BSP config rm Remove bare kernel config options from a BSP patch list List the patches associated with a BSP patch add Patch the Yocto kernel for a BSP patch rm Remove patches from a BSP feature list List the features used by a BSP feature add Have a BSP use a feature feature rm Have a BSP stop using a feature features list List the features available to BSPs feature describe Describe a particular feature feature create Create a new BSP-local feature feature destroy Remove a BSP-local feature See 'yocto-kernel help COMMAND' for more information on a specific command. Options: --version show program's version number and exit -h, --help show this help message and exit -D, --debug output debug information
The yocto-kernel patch add
sub-command allows you to add a
patch to a BSP.
The following example adds two patches to the myarm
BSP:
$ yocto-kernel patch add myarm ~/test.patch Added patches: test.patch $ yocto-kernel patch add myarm ~/yocto-testmod.patch Added patches: yocto-testmod.patch
You can verify patches have been added by using the
yocto-kernel patch list
sub-command.
Here is an example:
$ yocto-kernel patch list myarm The current set of machine-specific patches for myarm is: 1) test.patch 2) yocto-testmod.patch
You can also use the yocto-kernel
script to
remove a patch using the yocto-kernel patch rm
sub-command.
Here is an example:
$ yocto-kernel patch rm myarm Specify the patches to remove: 1) test.patch 2) yocto-testmod.patch 1 Removed patches: test.patch
Again, using the yocto-kernel patch list
sub-command,
you can verify that the patch was in fact removed:
$ yocto-kernel patch list myarm The current set of machine-specific patches for myarm is: 1) yocto-testmod.patch
In a completely similar way, you can use the yocto-kernel config add
sub-command to add one or more kernel config item settings to a BSP.
The following commands add a couple of config items to the
myarm
BSP:
$ yocto-kernel config add myarm CONFIG_MISC_DEVICES=y Added item: CONFIG_MISC_DEVICES=y $ yocto-kernel config add myarm CONFIG_YOCTO_TESTMOD=y Added item: CONFIG_YOCTO_TESTMOD=y
You can list the config items now associated with the BSP. Doing so shows you the config items you added as well as others associated with the BSP:
$ yocto-kernel config list myarm The current set of machine-specific kernel config items for myarm is: 1) CONFIG_MISC_DEVICES=y 2) CONFIG_YOCTO_TESTMOD=y
Finally, you can remove one or more config items using the
yocto-kernel config rm
sub-command in a manner
completely analogous to yocto-kernel patch rm
.