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

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Hi Oliver,

On Monday, 19 September 2022 16:17:28 CEST Diederik de Haas wrote:
> 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.
> 
> 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).

I have a Thinkpad (but an X1 4th gen) and found that I apparently also have an 
NFC chip.

https://salsa.debian.org/diederik/linux/-/tree/enable-nfc-bug-1020276 contains 
the branch I made to enable it. Turns out that NFC_NCI is needed as well.

Booting into the kernel built with those options and I did see various nxp 
modules being loaded and it also showed up in dmesg.
The output of `lspci` and `lsusb` didn't change however.

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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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