linux-kernel - [PATCH v5 0/3] Add support for STMicroelectronics M24LR EEPROM/NFC chips

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Message-ID: <20250704123914.11216-1-abd.masalkhi@gmail.com>
Date: Fri,  4 Jul 2025 12:39:11 +0000
From: Abd-Alrhman Masalkhi <abd.masalkhi@...il.com>
To: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Cc: arnd@...db.de,
	gregkh@...uxfoundation.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	luoyifan@...s.chinamobile.com,
	abd.masalkhi@...il.com
Subject: [PATCH v5 0/3] Add support for STMicroelectronics M24LR EEPROM/NFC chips

This patch series adds support for the STMicroelectronics M24LR series
RFID/NFC EEPROM devices. These chips expose two I2C addresses: the primary
one provides access to system control and configuration registers, while
the secondary address is used for EEPROM access.

The driver implements both functionalities:
 - A sysfs-based interface for the control and system parameter registers.
 - EEPROM access via the nvmem subsystem using a secondary I2C dummy
   client.

Tested on: M24LR04E-R using Yocto on Raspberry Pi 4

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

Abd-Alrhman Masalkhi (3):
  dt-bindings: eeprom: Add ST M24LR support
  eeprom: add driver for ST M24LR series RFID/NFC EEPROM chips
  ABI: sysfs: add documentation for ST M24LR EEPROM and control
    interface

 .../ABI/testing/sysfs-bus-i2c-devices-m24lr   | 100 +++
 .../devicetree/bindings/eeprom/st,m24lr.yaml  |  52 ++
 drivers/misc/eeprom/Kconfig                   |  18 +
 drivers/misc/eeprom/Makefile                  |   1 +
 drivers/misc/eeprom/m24lr.c                   | 653 ++++++++++++++++++
 5 files changed, 824 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-i2c-devices-m24lr
 create mode 100644 Documentation/devicetree/bindings/eeprom/st,m24lr.yaml
 create mode 100644 drivers/misc/eeprom/m24lr.c

-- 
2.43.0