Phytec L-1017e.A3 i.MX 8M Plus, Manual

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L-1017e.A3 i.MX 8M Plus BSP Manual
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Device Tree (DT)
Introduction
The following text briefly describes the Device Tree and can be found in the Linux kernel Documentation ( https://
docs.kernel.org/devicetree/usage-model.html )
"The “Open Firmware Device Tree”, or simply Devicetree (DT), is a data structure and language for describing
hardware. More specifically, it is a description of hardware that is readable by an operating system so that the
operating system doesn’t need to hard code details of the machine."
The kernel documentation is a really good source for a DT introduction. An overview of the device tree data format
can be found on the device tree usage page at
devicetree.org .
PHYTEC i.MX 8M Plus BSP Device Tree Concept
The following sections explain some rules PHYTEC has defined on how to set up device trees for our i.MX 8M Plus
SoC -based boards.
Device Tree Structure
Module .dtsi - Module includes all devices mounted on the SoM, such as PMIC and RAM.
Carrierboard.dtsi - Devices that come from the i.MX 8M Plus SoC but are just routed down to the carrier board
and used there are included in this dtsi.