kernel/linux.git/drivers/nfc, branch v6.18.21

NFC: nxp-nci: allow GPIOs to sleep

2026-03-25T10:10:31+00:00

commit 55dc632ab2ac2889b15995a9eef56c753d48ebc7 upstream. Allow the firmware and enable GPIOs to sleep. This fixes a `WARN_ON' and allows the driver to operate GPIOs which are connected to I2C GPIO expanders. -- >8 -- kernel: WARNING: CPU: 3 PID: 2636 at drivers/gpio/gpiolib.c:3880 gpiod_set_value+0x88/0x98 -- >8 -- Fixes: 43201767b44c ("NFC: nxp-nci: Convert to use GPIO descriptor") Cc: stable@vger.kernel.org Signed-off-by: Ian Ray Link: https://patch.msgid.link/20260317085337.146545-1-ian.ray@gehealthcare.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman

nfc: pn533: properly drop the usb interface reference on disconnect

2026-03-12T11:09:34+00:00

commit 12133a483dfa832241fbbf09321109a0ea8a520e upstream. When the device is disconnected from the driver, there is a "dangling" reference count on the usb interface that was grabbed in the probe callback. Fix this up by properly dropping the reference after we are done with it. Cc: stable Signed-off-by: Greg Kroah-Hartman Reviewed-by: Simon Horman Fixes: c46ee38620a2 ("NFC: pn533: add NXP pn533 nfc device driver") Link: https://patch.msgid.link/2026022329-flashing-ought-7573@gregkh Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman

nfc: nxp-nci: remove interrupt trigger type

2026-03-04T12:20:27+00:00

[ Upstream commit 57be33f85e369ce9f69f61eaa34734e0d3bd47a7 ] For NXP NCI devices (e.g. PN7150), the interrupt is level-triggered and active high, not edge-triggered. Using IRQF_TRIGGER_RISING in the driver can cause interrupts to fail to trigger correctly. Remove IRQF_TRIGGER_RISING and rely on the IRQ trigger type configured via Device Tree. Signed-off-by: Carl Lee Link: https://patch.msgid.link/20260205-fc-nxp-nci-remove-interrupt-trigger-type-v2-1-79d2ed4a7e42@amd.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

Revert "nfc/nci: Add the inconsistency check between the input data length and count"

2026-01-30T09:32:13+00:00

commit f40ddcc0c0ca1a0122a7f4440b429f97d5832bdf upstream. This reverts commit 068648aab72c9ba7b0597354ef4d81ffaac7b979. NFC packets may have NUL-bytes. Checking for string length is not a correct assumption here. As long as there is a check for the length copied from copy_from_user, all should be fine. The fix only prevented the syzbot reproducer from triggering the bug because the packet is not enqueued anymore and the code that triggers the bug is not exercised. The fix even broke testing/selftests/nci/nci_dev, making all tests there fail. After the revert, 6 out of 8 tests pass. Fixes: 068648aab72c ("nfc/nci: Add the inconsistency check between the input data length and count") Cc: stable@vger.kernel.org Signed-off-by: Thadeu Lima de Souza Cascardo Link: https://patch.msgid.link/20260113202458.449455-1-cascardo@igalia.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman

nfc: pn533: Fix error code in pn533_acr122_poweron_rdr()

2026-01-02T11:56:47+00:00

[ Upstream commit 885bebac9909994050bbbeed0829c727e42bd1b7 ] Set the error code if "transferred != sizeof(cmd)" instead of returning success. Fixes: dbafc28955fa ("NFC: pn533: don't send USB data off of the stack") Signed-off-by: Dan Carpenter Link: https://patch.msgid.link/aTfIJ9tZPmeUF4W1@stanley.mountain Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

nfc: s3fwrn5: Use SHA-1 library instead of crypto_shash

2025-08-19T00:29:08+00:00

Now that a SHA-1 library API is available, use it instead of crypto_shash. This is simpler and faster. Signed-off-by: Eric Biggers Reviewed-by: Krzysztof Kozlowski Link: https://patch.msgid.link/20250815022329.28672-1-ebiggers@kernel.org Signed-off-by: Jakub Kicinski

nfc: pn533: Delete an unnecessary check

2025-08-15T00:33:20+00:00

The "rc" variable is set like this: if (IS_ERR(resp)) { rc = PTR_ERR(resp); We know that "rc" is negative so there is no need to check. Signed-off-by: Dan Carpenter Reviewed-by: Krzysztof Kozlowski Link: https://patch.msgid.link/aJwn2ox5g9WsD2Vx@stanley.mountain Signed-off-by: Jakub Kicinski

NFC: trf7970a: Create device-tree parameter for RX gain reduction

2025-06-27T22:08:57+00:00

The TRF7970a device is sensitive to RF disturbances, which can make it hard to pass some EMC immunity tests. By reducing the RX antenna gain, the device becomes less sensitive to EMC disturbances, as a trade-off against antenna performance. Add a device tree option to select RX gain reduction to improve EMC performance. Selecting a communication standard in the ISO control register resets the RX antenna gain settings. Therefore set the RX gain reduction everytime the ISO control register changes, when the option is used. Signed-off-by: Paul Geurts Reviewed-by: Krzysztof Kozlowski Link: https://patch.msgid.link/20250626141242.3749958-3-paul.geurts@prodrive-technologies.com Signed-off-by: Jakub Kicinski

treewide, timers: Rename from_timer() to timer_container_of()

2025-06-08T07:07:37+00:00

Move this API to the canonical timer_*() namespace. [ tglx: Redone against pre rc1 ] Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com

nfc: Correct Samsung "Electronics" spelling in copyright headers

2025-05-22T03:31:18+00:00

Fix the misspelling of "Electronics" in copyright headers across: - s3fwrn5 driver - virtual_ncidev driver Signed-off-by: Sumanth Gavini Reviewed-by: Krzysztof Kozlowski Link: https://patch.msgid.link/20250520072119.176018-1-sumanth.gavini@yahoo.com Signed-off-by: Jakub Kicinski