linux-kernel - [PATCH 0/3] Add control driver for ST M24LR RFID/NFC EEPROM chips

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Message-ID: <20250531081159.2007319-1-abd.masalkhi@gmail.com>
Date: Sat, 31 May 2025 08:11:56 +0000
From: Abd-Alrhman Masalkhi <abd.masalkhi@...il.com>
To: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Cc: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	arnd@...db.de,
	gregkh@...uxfoundation.org,
	abd.masalkhi@...il.com
Subject: [PATCH 0/3] Add control driver for ST M24LR RFID/NFC EEPROM chips

This patch series adds support for the control interface of
STMicroelectronics M24LR RFID/NFC EEPROM devices, such as M24LR04E-R.

The device exposes two I2C addresses: one for the control interface
and another for EEPROM memory. To support this design, the driver
acts as an I2C mux (gate), exposing the EEPROM as a child node
handled by the standard at24 driver. Using the mux not only enables
clean separation of functions but also allows synchronize access to
the device.

Patches:
  - Patch 1: Adds Device Tree binding for the control interface.
  - Patch 2: Adds the sysfs-based control driver.
  - Patch 3: Adds a MAINTAINERS entry for the driver.

Tested on: m24lr04e-r 

Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@...il.com>

Abd-Alrhman Masalkhi (3):
  dt-bindings: misc: Add binding for ST M24LR control interface
  misc: add sysfs control driver for ST M24LR series RFID/NFC chips
  MAINTAINERS: Add entry for ST M24LR control driver

 .../devicetree/bindings/misc/st,m24lr.yaml    |  70 ++
 MAINTAINERS                                   |   8 +
 drivers/misc/Kconfig                          |  15 +
 drivers/misc/Makefile                         |   1 +
 drivers/misc/m24lr_ctl.c                      | 677 ++++++++++++++++++
 5 files changed, 771 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/st,m24lr.yaml
 create mode 100644 drivers/misc/m24lr_ctl.c

-- 
2.43.0