As part of a recent project at Bootlin, we implemented A/B Over-The-Air (OTA) updates on a a system based on the RaspberryPi 5 using RAUC. We ended up not using U-Boot as a bootloader and instead rely solely on the RaspberryPi firmware as a bootloader. This post will dive into the details of making this happen, and some advanced features of RAUC.
Continue reading “Safe updates using RAUC on Raspberry Pi 5”
As we previously announced, Bootlin is proud to be a Chef Sponsor of Embedded Recipes 2025. A large part of our team will be attending the event, which takes place on May 14–15 in Nice, France.
We’re also excited to share that Bootlin engineer Antonin Godard will be giving a talk titled Yocto Project and OpenEmbedded: Recent Changes and Future Directions. As the official maintainer of the Yocto Project documentation, Antonin brings a unique perspective on the latest developments and upcoming changes in Yocto/OpenEmbedded. Here is the full abstract of his talk:
The Yocto Project and OpenEmbedded form the foundation of many embedded Linux systems, providing a powerful and flexible build system for custom distributions. In this talk, Antonin Godard, embedded Linux engineer at Bootlin and Yocto Project documentation maintainer, will explore recent developments in the project, including key changes in the latest releases, improvements in tooling. Attendees will gain insights into the future roadmap of Yocto/OpenEmbedded and how these changes impact developers and system integrators. Whether you’re a long-time Yocto user or just getting started, this session will help you stay up to date with the latest advancements in the ecosystem.
There’s still time to secure your seat at Embedded Recipes—don’t miss this unique single-track conference that fosters deep technical exchange and networking. And of course, take advantage of the beautiful spring weather in Nice while you’re there!
The EU’s new Cyber Resilience Act (CRA) sets out a comprehensive framework of cybersecurity requirements for products with digital elements. While most of its provisions will apply starting December 11, 2027, certain obligations—most notably, reporting duties for manufacturers—will kick in earlier, on September 11, 2026.
In a previous blog post, we offered an overview of the CRA and its broader context. In this article, we’re narrowing the focus to a key actor in the CRA’s ecosystem: the manufacturer. We’ll explore what qualifies someone as a manufacturer under the regulation, and what responsibilities that role carries under the new law.
Continue reading “Cyber Resilience Act (CRA) – Obligations for manufacturers”
We are proud to announce the launch of a brand new addition to our lineup of training courses: Embedded Linux Networking!
This training course is designed to provide embedded Linux engineers with a deep and practical understanding of networking concepts and their implementation in both the Linux kernel and user-space — with a strong focus on real-world embedded applications.
Continue reading “Announcing our new Embedded Linux Networking training course”
As kernel developers, we often find ourselves writing device drivers—pieces of code that are typically registered using module_init() in the Linux kernel. But have you ever paused to wonder: just how late in the boot process does this happen? What exactly takes place between the moment we see the famous "Starting kernel..." message and the point where drivers are finally registered and devices probed?
If you’re curious about the intricate steps that occur before the system even reaches a working init process, you’re in the right place. Join us as we explore the fascinating journey of the Linux kernel boot sequence—step by step.
Throughout this article, you’ll find clickable links to our Elixir source code browser. We encourage you to dive in and follow along!
Continue reading “Demystifying the Kernel Boot Sequence: From ‘Starting Kernel…’ to Userspace””
This post is the fifth blog post in our series of blog posts about Zephyr. You can find the previous episodes below:
In this 5th blog post, we are going to implement a driver for the Nunchuk joystick from Nintendo. The Nunchuk is a simple joystick, which has the advantage of having a very simple interface that relies on the I²C bus.
Continue reading “Zephyr: making a driver for the Nunchuk joystick”
Around mid-March, Bootlin engineers Köry Maincent and Romain Gantois had the chance to attend edition 0x19 of the Netdev conference, where developers from the Linux kernel networking community assemble for four days of technical presentations and discussions.
They were generally very much impressed by the quality and detail of the talks given during this conference, and they have selected two of the talks that they found the most interesting, which they summarized below. We expect the slides and videos to be published at some point in the future, but they don’t seem to be available at the moment.
Aside from the upcoming Embedded Recipes conference in Nice on May 14-16, one of the most significant events for the open-source embedded community in Europe will be the Open Source Summit Europe. In particular, its key sub-conferences—the Embedded Linux Conference (ELC) and the Zephyr Developer Summit—will bring together experts, developers, and enthusiasts. This conference will take place on August 25-27, 2025, in Amsterdam.
These events thrive on high-quality technical talks, making the selection of topics crucial. To shape a great program, the Call For Papers is open until April 14, 2025. If you’re working on an exciting project related to Embedded Linux or Zephyr, we strongly encourage you to submit a proposal! Keep in mind that this is an open-source conference, so commercial talks and sales pitches are not suitable—the focus is purely on technical content.
Presenting at the conference is an excellent opportunity to share your expertise with a global audience. All talks are recorded and made freely available online, ensuring that your contributions reach a wider community even beyond the event.
At Bootlin, we have a long history of engagement with the Embedded Linux Conference—our engineers have delivered numerous talks, and we have actively contributed to the program selection process. For 2025, Bootlin CEO Thomas Petazzoni is once again part of the Program Committee for the Embedded Linux Conference Europe, helping to curate an outstanding lineup of talks.
Don’t miss this opportunity—submit your talk and be part of the conversation shaping the future of embedded systems!
Linux 6.14 was released last week, and as usual, we recommend checking out the LWN articles covering the 6.14 merge window (part 1, part 2) to get a good sense of the main new features and updates in this release.
Bootlin engineers have once again been busy contributing to this kernel release, with 125 commits authored by Bootlin engineers, and 60 patches reviewed and merged by Bootlin engineers who are maintainers of specific parts of the Linux kernel.
Continue reading “Linux 6.14 released, Bootlin contributions inside”
After a break in 2024, the Embedded Recipes conference is back in 2025! It will take place in Nice, France from May 14 to May 16.
Bootlin is a Chef Sponsor of the event, and we will have a strong participation, with numerous engineers from our team attending the conference. Indeed no less than 15 engineers from our team will participate: Alexandre Belloni, Alexis Lothoré, Antonin Godard, Bastien Curutchet, Hervé Codina, Jérémie Dautheribes, João Marcos Costa, Köry Maincent, Mathieu Dubois-Briand, Miquèl Raynal, Richard Genoud, Théo Lebrun, Thomas Petazzoni, Thomas Perrot and Thomas Richard.
Even if the schedule is yet to be published, the Embedded Recipes organizers have always managed to put together an excellent line-up of talks and speakers, so we definitely recommend to anyone working on embedded Linux topics to join us and attend Embedded Recipes!
