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Give Zephyr boards a USB serial number - #11579
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zephyr-cp boards enumerate with no iSerial, so a host cannot tell two identical boards apart and udev's /dev/serial/by-id names collide. The TinyUSB ports report the chip's unique ID there. Add Zephyr's serial number string descriptor, which the USB device stack fills from hwinfo_get_device_id() (CONFIG_HWINFO is already on in prj.conf). Only add it when the SoC has a hwinfo driver; without one the stack logs an error and the descriptor request fails. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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What
Zephyr boards now report a USB serial number, taken from the chip's unique ID.
Why
Without one, a computer cannot tell two identical boards apart.
cpu.uid, same after J-Link resetcpu.uidsame as on maincpu.uid, same after power cyclecpu.uidsame as on mainE6614103E7164037)cpu.uidEvery Zephyr board here with USB has an ID driver.
The guard only matters for future boards without one.
Pico W ran with #11570 added, so it could be reflashed.
Written with Claude; tested on hardware by me.
🤖 Generated with Claude Code