Boot interfaces overview
The DT nodes provide access to the boot interfaces and properties. The DT provides a data structure that describes the system’s hardware information. The image execution environment, which includes firmware such as XBL and UEFI, reads this information. You can modify the DT properties associated with boot to customize the functionality of various device software features.
For information about modifying the interfaces using the QDTE tool and changing the DT properties in the prebuilt Devicetree blob (DTB) using the QDTE tool, see Configure QDTE.
For more information about DT, see https://github.com/devicetree-org.
Platform information
The platform information devicetree provides the information about CDT, which contains platform information version, platform type, major hardware version, minor hardware version, subtype and OEM-id.
Boot devicetree properties
The boot devicetree properties provide information on how to enable and disable user-initiated emergency download (EDL) in XBL. The boot DT properties also describe the EDL timeout and the USB cable options that can force the system into the EDL mode. The boot-related functionality configures using the boot DT properties.
Power management integrated circuit (PMIC)
The power management integrated circuit (PMIC) is a specialized electronic component that manages various power supply requirements within a device.
General-purpose input/output (GPIO) functions
The hardware controls the multiplexing of general-purpose input/output (GPIO) and alternate functions through the top-level mode multiplexer (TLMM). You can configure the GPIOs during the boot process using the DT properties for TLMM.
Buses
A bus facilitates data transfer among various system components. The DT properties allow for the configuration of the Qualcomm Universal Peripheral (QUP) v3 serial interface device nodes.
Storage
The DT properties for storage configurations.
USB
The DT properties for USB allow you to adjust the USB signal quality.