scripts/feeds update to update only one feed scripts/feeds update -i to recreate the index file More specifically, you can also selectively update and install feeds and packages by using: scripts/feeds install -a to install symlinks of all of them into package/feeds/. scripts/feeds update -a to get all the latest package definitions defined in nf / respectively and. List : List feeds, their content and revisions (if installed)Īs described in Onion's repository README: There are scripts inside the script/ folder to help you manage your feeds./scripts/feeds -h Install symlinks to the packages in package/feeds/ so they become available in make menuconfig.Update the index files in feeds/ of available packages defined in nf.There are two main steps for adding a new kernel module package: You can visit the links to see what's inside them. So they are just a bunch of links to git repositories where packages are stored. The sources are defined in the nf and file. Where do these packages come from? They come from the package feed. After exiting and saving the configuration you can build the module by executing make (with optional -j4 for 4-core multithreading). We can select a kernel module there and mark it with "M" - meaning that this will build into a kernel module file. When we execute make menuconfig in the source folder, we get a menu where we can configure stuff: I built the toolchain within a Xubuntu VM. You should also have a basic idea on how to cross-compile a program for the Omega2. This includes cloning Onion's source repository for LEDE-17.01 and building it. Where can we see what stock kernel modules and libraries we can build? For this, you need the cross-compilation environment first. Understanding the LEDE build system for kernel modules This tutorial is for the case when you don't find your wanted module there or you want to build something new (e.g., peripheral drivers. As a first reference, you should look into Onion's package repository. rw-r-r- 1 root root 325244 Apr 2 23:19 bluetooth.koįor a project you might need a kernel module that is not included or distributed for the Omega2. lsmodīluetooth 258081 8 rfcomm,hidp,hci_uart,btusb,btintel,bnep ko files are stored in /lib/modules/4.4.74. You can look at your loaded kernel modules by executing lsmod and get more info on a module by executing modinfo. kmod-usb-audio - Audio over USB devices.kmod-spi-dev - exposes linux SPI device.Kernel modules then expose certain functionality or device files to the user space. You may only have direct hardware register access to e.g. A kernel module also runs with higher priviledges (kernel space vs user space). Things like USB drivers / systems, interface drivers, input drivers, can be distributed in the form of the kernel modules. They extend the functionality of the kernel without the need to reboot the system. Kernel modules are pieces of code that can be loaded and unloaded into the kernel upon demand. What are kernel modules and why should you care? Other prerequisites will be installed during the tutorial. Do opkg update & opkg install kmod if it isn't already there. This tutorial is working with the newest firwmare version b178, kernel version 4.4.74. This is why I've created this tutorial to share what I've learned over the past few days which led me to a functioning kernel module compilation. However I didn't find any conclusive step-by-step tutorial on here that explains how to build a kernel module from the ground up. There are several related topics in this forum (e.g. This is a tutorial on how to build and run Linux kernel modules (. Building Kernel Modules for the Omega2 Introduction Update : Contains new section about reading hardware registers. So I decided to write one as a side-project. I saw that there wasn't yet a condensed write-up on how to manage, compile and run your own kernel modules for the Omega2. ![]() During a new project of mine, I needed a new kernel module for a device driver.
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