Acpi Prp0001 0 [FREE]

Example: drivers/iio/pressure/bmp280.c includes:

Compile ( iasl ssdt.asl ) and load via cat ssdt.aml > /sys/kernel/config/acpi/table/ssdt1 .

Name (_HID, "PRP0001") Name (_DSD, Package () ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () Package () "compatible", "bosch,bme280" , Package () "reg", 0x77 , // I2C address ) For a PRP0001 device to work, the kernel driver must support both Device Tree and ACPI PRP0001. The driver typically uses the MODULE_DEVICE_TABLE macro with of_match_ptr and an ACPI match table. acpi prp0001 0

Introduction: The Enigmatic Boot Message If you’ve ever watched the Linux kernel boot with dmesg or journalctl -k , you may have encountered a line that looks something like this:

ls /sys/bus/i2c/devices/

Notice the trick: The ACPI ID is PRP0001 , but the driver uses a pointer to the OF match table. The kernel then tries each compatible string in the _DSD against that table. Problem: Device not created (error -16 or -19) Step 1: Confirm the device is actually enumerated

The Linux kernel parses these tables and creates platform devices, PCI devices, or ACPI-defined devices accordingly. Each device in ACPI has a unique – a string like PNP0501 (legacy serial port) or INT33BD (Intel I2C controller). Example: drivers/iio/pressure/bmp280

This article will leave no stone unturned. We will explore what acpi prp0001 0 means, why it appears on your system, how it relates to the PRP0001 Hardware ID, and how to debug issues associated with it. Before deciphering prp0001 , we must understand ACPI (Advanced Configuration and Power Interface) .