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December 14 - 15, 2021 | Virtual Event
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Tuesday, December 14 • 13:30 - 14:20
Demystifying Device Tree Concepts - Priya Dixit, Samsung Semiconductor India R&D Center

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A device tree is a data structure describing hardware to the Kernel. It serves many purposes including device population and runtime configuration. We usually pass the compiled device tree blob file along with Kernel Image so it is important to understand how we extract this device tree blob file while booting. In this presentation, we will see how various device drivers use the device tree structure independent of the architecture used and common APIs using which device tree parsing is done while booting the system. We will also cover the device tree compiler tools and how to debug the errors in the device tree using tools like dtdiff. Then we will introduce "Device Tree Overlay" concept, which is used to dynamically insert a device tree fragment to a live tree. We will cover the APIs used, the applications of Device Tree Overlay and how it can be implemented from Kernel-space as well as from user-space.
Speakers
avatar for Priya Dixit

Priya Dixit

Associate Staff Engineer, Samsung Semiconductor India R&D Center
Having over 6+ years of experience, I am passionate about Linux Kernel Internals. In the past years, I have worked on bootloaders, various device drivers and Kernel Internals to name a few. I like to demystify the complicated features and designs. I am up looking for the advancements... Read More →

OSSALS JP21 DemystifyingDeviceTreeConcepts pptx
Tuesday December 14, 2021 13:30 - 14:20 JST
Linux Systems Theater
  Linux Systems