Bug#1020276: linux-image-5.19.0-1-amd64: NFC device not detected

From	Diederik de Haas <didi.debian@cknow.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1020276: linux-image-5.19.0-1-amd64: NFC device not detected
Date	2022-09-19 16:30 +0200
Message-ID	<F7pWx-8DWz-1@gated-at.bofh.it> (permalink)
References	<F7kat-8Aay-5@gated-at.bofh.it> <F7pDb-8DPX-1@gated-at.bofh.it> <F7kat-8Aay-5@gated-at.bofh.it> <F7pDb-8DPX-1@gated-at.bofh.it>
Organization	Connecting Knowledge

Cross-posted to 2 groups.

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On maandag 19 september 2022 15:55:13 CEST Diederik de Haas wrote:
> What is needed is finding out which NFC chip(s/set) is being used in your
> device. Assuming it is supported on Linux, it could be as simple as enabling
> a kernel config option.

Right after sending that I found https://wiki.archlinux.org/title/
Lenovo_ThinkPad_X1_Yoga_(Gen_4)#NFC which points to 
https://github.com/nfc-tools/libnfc/issues/455 and from that it seems highly 
likely that the chip that is used is a NXP NCP300 and is likely/probably using 
an I2C interface.

In drivers/nfc/nxp-nci/Kconfig there are 2 options:
- NFC_NXP_NCI which mentions NPC300 explicitly
- NFC_NXP_NCI_I2C which is needed when an I2C interface is used.

If you know how to build a Debian kernel, you can add those 2 options and 
verify whether that indeed makes your NFC device available (and working).

Thread

Bug#1020276: linux-image-5.19.0-1-amd64: NFC device not detected Diederik de Haas <didi.debian@cknow.org> - 2022-09-19 16:10 +0200
  Bug#1020276: linux-image-5.19.0-1-amd64: NFC device not detected Diederik de Haas <didi.debian@cknow.org> - 2022-09-19 16:30 +0200
    Bug#1020276: linux-image-5.19.0-1-amd64: NFC device not detected Diederik de Haas <didi.debian@cknow.org> - 2022-09-21 10:40 +0200

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