ODROID-XU4 not detected on kernels with Hardware field in /proc/cpuinfo #415

ODROID-XU4 not detected on kernels with Hardware field in /proc/cpuinfo

Description

The ODROID-XU4 is not detected by PlatformDetect on Armbian (and likely other non-Hardkernel images) because the compatible-string detection block is gated behind if hardware is None:, but the XU4 reports a Hardware field in /proc/cpuinfo.

Environment

• Board: ODROID-XU4
• OS: Armbian (Debian Bookworm, kernel 6.6.141-current-odroidxu4)
• Python: 3.13.5
• adafruit-platformdetect: 3.88.0

/proc/cpuinfo Hardware field

Hardware	: Samsung Exynos (Flattened Device Tree)

/proc/device-tree/compatible

hardkernel,odroid-xu4
samsung,exynos5800
samsung,exynos5

Root cause

In chip.py, the block that checks /proc/device-tree/compatible for "odroid-xu4" is nested inside if hardware is None::

hardware = self.detector.get_cpuinfo_field("Hardware")

if hardware is None:
    compatible = self.detector.get_device_compatible()
    ...
    if compatible and "odroid-xu4" in compatible:   # never reached on XU4
        linux_id = chips.EXYNOS5422

Since hardware is "Samsung Exynos (Flattened Device Tree)" (not None), the entire block is skipped. The fallback check later (elif "ODROID-XU4" in hardware) also fails because the hardware string does not contain "ODROID-XU4".

Fix

Move the "odroid-xu4" compatible check outside the if hardware is None: block, similar to the check_dt_compatible_value() calls used for other boards earlier in the same method.