Add wilc3000 driver to Yocto raspberry pi - linux

Question

I want to build my own yocto image for a raspberry (cm3). I use the meta-raspberry (dunfell) layer and poky dunfell-23.0.0.
For installing the microchip wilc3000 module I have to modify the kernel following this guide. In that way, I change the kernel conf (Kconfig) to add the mchp driver in the menu and later selecting it.
I have generated a patch to the kernel using this guide (Patch-based workflow). After generating the patch, I have modified and generated a new kernel config (defconfig). All the changes are applied in my own layer with this recipe (linux-raspberrypi_%.bbappend):
FILESEXTRAPATHS_prepend := "${THISDIR}/patchs:"
SRC_URI += "file://0001-Add-wilc3000-driver.patch \
file://defconfig_my \
"
PACKAGE_ARCH = "${MACHINE_ARCH}"
# PR="r2"
INTREE_DEFCONFIG_pn-linux-ti = "defconfig_my"
kmoddir = "/lib/modules/${KERNEL_VERSION}/kernel/drivers/net/wireless/mchp"
# do_configure_append() {
# cat ${WORKDIR}/*.cfg >> ${B}/.config
# }
do_install_append() {
install -d ${D}${kmoddir}
install -m 0755 ${WORKDIR}/wilc-spi.ko ${D}${kmoddir}
}
FILES_${PN}_append += " \
${kmoddir}/wilc-spi.ko \
"
The patchs folder contains the patch for the kernel and the new kernel configuration generated
When I generate the image:
bitbake -v core-image-base
The generation fails in do_install task when it tries to copy wilc-spi.ko, which is not generated.
Which is the way to compile and deploy the kernel with my own configuration? if I download and compile the kernel in a separate folder, it successfully generates the wilc-spi.ko, but inside build folder in yocto there is no trace of the file generation.
Please, help me to add this driver to the kernel, Thanks a lot.

Answer 1

As #qschulz pointed out, the solution was to change defconfig_my to defconfig and remove all the extra code. Finally, the code looks like this:
FILESEXTRAPATHS_prepend := "${THISDIR}/patchs:"
SRC_URI += "file://0001-Add-wilc3000-driver.patch \
file://defconfig \
"
PACKAGE_ARCH = "${MACHINE_ARCH}"
PR="r3"
FILES_${PN}_append += " \
${kmoddir}/wilc-spi.ko \
"
KERNEL_MODULE_AUTOLOAD += "wilc-spi.ko"
And add in the layer.conf the instruction to load the module:
MACHINE_EXTRA_RDEPENDS += " kernel-module-wilc-spi "