power: supply: Add support for MAX77840 charger, charger-detect and fuel gauge

This patch adds driver support for the MAX77840 charger, charger-detect,
and fuel gauge functionalities, enabling proper battery management
and monitoring on supported platforms.

Signed-off-by: joan-na-good <joan.na@analog.com>

Author: joan-na-good

drivers/power/supply/Kconfig

@@ -552,6 +552,19 @@ config CHARGER_MAX77693
 	help
 	  Say Y to enable support for the Maxim MAX77693 battery charger.
 
+config CHARGER_MAX77840
+	tristate "Maxim Integrated MAX77840 Charger with Fuel Gauge"
+	depends on MFD_MAX77840
+	help
+	  Say Y here to enable support for the Maxim Integrated MAX77840 charger
+	  with integrated fuel gauge functionality. This driver provides support
+	  for battery charging, battery capacity monitoring, and handles various
+	  charger-related interrupts such as charging state changes or faults.
+
+	  The MAX77840 communicates over the I2C bus and is typically part of a
+	  PMIC used in portable devices. This driver interfaces with the Linux
+	  power supply subsystem.
+
 config CHARGER_MAX77976
 	tristate "Maxim MAX77976 battery charger driver"
 	depends on I2C

drivers/power/supply/Makefile

@@ -77,6 +77,7 @@ obj-$(CONFIG_CHARGER_MAX14577)	+= max14577_charger.o
 obj-$(CONFIG_CHARGER_DETECTOR_MAX14656)	+= max14656_charger_detector.o
 obj-$(CONFIG_CHARGER_MAX77650)	+= max77650-charger.o
 obj-$(CONFIG_CHARGER_MAX77693)	+= max77693_charger.o
+obj-$(CONFIG_CHARGER_MAX77840)	+= max77840-charger.o max77840-charger-detect.o max77840-battery.o
 obj-$(CONFIG_CHARGER_MAX77976)	+= max77976_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o