Installing a kernel module in rootfs in yocto build system - yocto

Question

I have a out of tree kernel module(hello.ko) from a vendor which i need to install in rootfs using yocto build. The kernel module is built on the same kernel which yocto build system is using.
I do not have the kernel source for the above module so i cannot build it using recipe.
How can i only install the kernel module in rootfs and to which path it will be installed.
Can anyone share a recipe for this.
I am new to yocto and recently started using it.
Inputs will be helpful.

Answer 1

Loadable kernel module are located in /lib/modules/<kernel_version>/kernel/drivers/
You can create a recipe and add your pre-compiled kernel module in files/lib/modules/<kernel_version>/kernel/drivers/
Then, add the line MODULE_NAME = "hello" to the module_autoload list. This is an example :
#Recipe for hello.ko
SUMMARY = "Hello world"
LICENSE = "closed"
SRC_URI = "file://hello.ko"
S="${WORKDIR}"
do_install()
{
install -d ${D}/lib/modules/${KERNEL_VERSION}/kernel/drivers
install -m 0644 ${WORKDIR}/hello.ko ${D}/lib/modules/${KERNEL_VERSION}/kernel/drivers/
}
FILES_${PN} += "/lib/modules/${KERNEL_VERSION}/kernel/drivers/hello.ko"
MODULE_NAME = "hello"
module_autoload = "${MODULE_NAME}"