Support request for ELAN7001 SPI fingerprint sensor (spi-ELAN7001:00)

[smallbiskit]

Title: Support request for ELAN7001 SPI fingerprint sensor (spi-ELAN7001:00)

Body:

I'm using an ASUS VivoBook X415JA laptop with an ELAN7001 SPI fingerprint sensor. The device is exposed as /dev/spidev0.0 and is identified by udev as spi-ELAN7001:00. It currently appears to be unsupported by libfprint. Running fprintd-enroll fails with enroll-unknown-error. The device is bound only to the generic spidev driver and is not recognized as a fingerprint reader by libfprint.

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🔍 What I’ve Checked

• lsusb: No fingerprint device (expected for SPI).
• udevadm info: Shows ELAN7001 bound to spidev.
• dmesg: No specific fingerprint or ELAN messages.
• fprintd: Fails to enroll fingerprint.

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📌 Request

Please consider adding support for the ELAN7001 SPI fingerprint reader to libfprint. I understand SPI devices are significantly harder to support than USB ones, and that there is no SPI driver in libfprint currently capable of communicating with this hardware. I am willing to test patches or help reverse-engineer the protocol if needed, and I have a dual-boot setup with Windows where the fingerprint reader works.

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📚 References

• Similar effort: depau/Elan-Fingerprint-0c4c-PoC
• Possibly related: libfprint issue #198

Thanks for your work on libfprint, and let me know if I can assist in any way with testing or data collection.

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System generated by smallbiskit@fedora

🔧 System Info

• OS: Fedora Linux 42 (Workstation Edition) x86_64
• Kernel: 6.15.8-200.fc42.x86_64
• Host: VivoBook_ASUSLaptop X415JAB_X415JA
• Fingerprint Device: ELAN7001 (SPI)
• Connection: SPI (not USB)
• Device Path: /dev/spidev0.0
• Udev Info:
  • KERNELS=="spi-ELAN7001:00"
  • DRIVERS=="spidev"
• libfprint status: Installed (from Fedora repo)
• fprintd output:

Using device /net/reactivated/Fprint/Device/0
Enrolling right-index-finger finger.
Enroll result: enroll-unknown-error