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| author | Paul Geurts <paul.geurts@prodrive-technologies.com> | 2026-04-22 13:09:30 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-04-28 04:00:43 +0300 |
| commit | a9bc28aa4e64320668131349436a650bf42591a5 (patch) | |
| tree | e772e2269d75b412e8a39af89e85afd8d571c82a /include/linux/instruction_pointer.h | |
| parent | adbe2cdf75461891e50dbe11896ac78e9af1f874 (diff) | |
| download | linux-a9bc28aa4e64320668131349436a650bf42591a5.tar.xz | |
NFC: trf7970a: Ignore antenna noise when checking for RF field
The main channel Received Signal Strength Indicator (RSSI) measurement
is used to determine whether an RF field is present or not. RSSI != 0
is interpreted as an RF Field is present. This does not take RF noise
and measurement inaccuracy into account, and results in false positives
in the field.
Define a noise level and make sure the RF field is only interpreted as
present when the RSSI is above the noise level.
Fixes: 851ee3cbf850 ("NFC: trf7970a: Don't turn on RF if there is already an RF field")
Signed-off-by: Paul Geurts <paul.geurts@prodrive-technologies.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Link: https://patch.msgid.link/20260422100930.581237-1-paul.geurts@prodrive-technologies.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/instruction_pointer.h')
0 files changed, 0 insertions, 0 deletions