eeprom: add driver for ST M24LR series RFID/NFC EEPROM chips

adds support for STMicroelectronics M24LRxx devices, which expose
two separate I2C addresses: one for system control and one for EEPROM
access. The driver implements both a sysfs-based interface for control
registers (e.g. UID, password authentication) and an nvmem provider
for EEPROM access.

Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Link: https://lore.kernel.org/r/20250717063934.5083-3-abd.masalkhi@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/eeprom/Kconfig

@@ -120,4 +120,22 @@ config EEPROM_EE1004
 	  This driver can also be built as a module.  If so, the module
 	  will be called ee1004.
 
+config EEPROM_M24LR
+	tristate "STMicroelectronics M24LR RFID/NFC EEPROM support"
+	depends on I2C && SYSFS
+	select REGMAP_I2C
+	select NVMEM
+	select NVMEM_SYSFS
+	help
+	  This enables support for STMicroelectronics M24LR RFID/NFC EEPROM
+	  chips. These dual-interface devices expose two I2C addresses:
+	  one for EEPROM memory access and another for control and system
+	  configuration (e.g. UID, password handling).
+
+	  This driver provides a sysfs interface for control functions and
+	  integrates with the nvmem subsystem for EEPROM access.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called m24lr.
+
 endmenu

drivers/misc/eeprom/Makefile

@@ -7,3 +7,4 @@ obj-$(CONFIG_EEPROM_93XX46)	+= eeprom_93xx46.o
 obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o
 obj-$(CONFIG_EEPROM_IDT_89HPESX) += idt_89hpesx.o
 obj-$(CONFIG_EEPROM_EE1004)	+= ee1004.o
+obj-$(CONFIG_EEPROM_M24LR) += m24lr.o