Hello there,
I am trying to add a few BSP specific kernel patches for my BSP and I wanted to
pull them from the BSP definition scc file. However, I cannot get those patches
applied (I am using thud). After looking around the kernel-yocto.bbclass it
seems that patches which get pulled from the BSP definition file are ignored.
What is the rationale behind that behavior? How should I go about it?
To be more specific I have the following structure within my (recipe-space)
kernel metadata.
bsp
`-- mybsp
|-- mypatch.patch
|-- mybsp.cfg
|-- msbsp.scc
`-- mybsp-standard.scc
The mybsp-standard.scc is the BSP definition file, which includes mybsp.scc
(among other things). The mybsp.scc file looks as follows
kconf hardware mybsp.cfg
patch mypatch.patch
The mypatch.patch file does not get applied when building the kernel, I checked
and it is not added to the patch.queue file. But if I add the following to the
recipe
KERNEL_FEATURES += " bsp/mybsp/mybsp.scc"
Then the patch is added to patch.queue and is applied.
Looking into do_kernel_metadata in kernel-yocto.bbclass it parses the scc files
in two steps, run1 and run2.
The run1 step uses elements="`echo -n ${bsp_definition} ${sccs} ${patches}
${KERNEL_FEATURES}`" and generates cfg, merge and meta, so that picks up the
mybsp.scc file contents, but this step does not generate the patch queue.
The run2 step uses elements="`echo -n ${sccs} ${patches} ${KERNEL_FEATURES}`"
and generates the patch queue, but this only includes the scc files in SRC_URI
and KERNEL_FEATURES, but specifically leaves out the BSP definition file.
Adding the mybsp.scc file to KERNEL_FEATURES to get this to work seems a bit
odd. What is the recommended way of applying BSP specific kernel patches?
Thanks,
Diego
--
Diego Santa Cruz, PhD
Technology Architect
spinetix.com
--
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