Unlike modern SoCs (System on Chip) that use Device Tree Blobs (DTBs), the PXA1826 relied heavily on compiled directly into the kernel or loaded as modules. This is where pxa1826-cfg.tar.gz enters the picture.
: If you find this file on your computer and do not develop mobile firmware, it may have been extracted from a mobile device backup or a software update tool.
For the uninitiated, this might look like a random collection of characters. However, for engineers working with Marvell’s (formerly Intel’s) XScale architecture, particularly the PXA18xx series application processors, this file represents a crucial piece of the boot chain and peripheral initialization puzzle.