is a highly specific hardware identification string that often triggers "Unknown Device" warnings in Windows Device Manager, especially on devices running alternative operating systems or customized hardware like the Steam Deck, Google Chromebooks, and Microsoft Surface laptops .
On a typical Linux kernel (v4.10+ through v6.x), the default behavior is:
cat /sys/bus/acpi/devices/PRP0001:00/path
Code analysis: This ASL block defines a device with the magic PRP0001 _HID. The _DSD package is critical, as it provides the "ti,ads7830" compatible string. The _CRS method describes the physical I2C connection details, like the device's bus address (0x4a) and speed. acpi prp0001 0
A Rust kernel developer identified that device_get_match_data() returned None for PRP0001 devices in Rust kernel modules because the Rust code stored an index in the of_device_id structure instead of a data pointer.
The motherboard BIOS/UEFI provides highly structured tables to the OS.
Ensure your kernel includes commit e3cb82c6d6f6c27ab754e13ae29bdd6b949982e2 (merged into mainline). If you are building a custom kernel for an embedded system, check that this commit is present. For distribution kernels (e.g., Ubuntu, Fedora, Debian), any kernel version released after mid‑2020 includes the fix automatically. is a highly specific hardware identification string that
ACPI is an industry standard that allows an operating system (OS) to communicate with hardware for power management and configuration . When you see PRP0001 , it typically appears in the Windows Device Manager under "Other Devices" or "System Devices" when a user installs Windows on hardware originally designed for the ChromeOS ecosystem, such as a or the Valve Steam Deck . Identifier Breakdown : ACPI : The subsystem managing the hardware state.
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It enables standard i2c-designware or spi-pxa2xx drivers to enumerate child devices that do not have dedicated ACPI HID drivers. The _CRS method describes the physical I2C connection
Lin's heart hammered. "That's impossible. ACPI tables are static data. They can't execute logic."
running Windows), it means Windows doesn't know how to handle this Linux-centric bridge. Steam Deck : It usually refers to specialized hardware like the Steam Deck's buttons/controllers