Acpi Prp0001 0 =link= -

In Linux systems, I²C devices defined with PRP0001 appear with generic names like i2c-PRP0001:04 instead of the actual part name. A user observed: "sound/soc/soc-core.c generates an i2c codec name i2c-TDA7802:00 . It is useful to identify that device by part name, rather than some indexed generic PRP device i2c-PRP0001:04 ".

When the ACPI subsystem enumerates a device with PRP0001 , the following logic determines how the device is matched and bound to a driver:

The kernel sees PRP0001 , then jumps to the _DSD (Device Specific Data) section, finds "honeywell,hmc5843" , and loads the correct driver. Common "PRP0001" Issues and Fixes

The ACPI PRP0001 device is responsible for managing various platform resources, including: acpi prp0001 0

The ACPI ID is a special "generic" identifier used primarily in Linux to allow the operating system to use Device Tree (DT) style device drivers even when the system firmware (BIOS/UEFI) uses ACPI. What it Means

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"I don't have a standard ACPI ID, but if you look inside my configuration, you'll find a standard Devicetree 'compatible' string" In Linux systems, I²C devices defined with PRP0001

) Name (_CRS, ResourceTemplate() I2cSerialBusV2(0x10, , , , , , , , "\\_SB.I2C0") )

acpi_prp0001=0 acpi=prp0001 0 acpi prp0001=off (not parsed; on/off are not defined)

Hardware identifiers dictate how operating systems choose which driver to load for a physical component. The string can be broken down technically: When the ACPI subsystem enumerates a device with

Next time you see that message in your boot logs, you’ll know:

[ 0.987654] ACPI: PRP0001:00: PRP0001 device

This identifier is not a hardware malfunction. Instead, it represents a bridge between two different engineering standards used to manage system hardware: and Device Tree (Open Firmware) . What is the PRP0001 Device ID?