[PATCH v3 0/2] Add LT8491 driver

[John Erasmus Mari Geronimo <johnerasmusmari.geronimo@analog.com>]

The LT8491 is a buck-boost switching regulator battery charger that
implements a constant-current constant-voltage (CCCV) charging profile.

Changes since v2:
https://lore.kernel.org/all/cover.1788432152.git.johnerasmusmari.geronimo@analog.com/
 - dt-bindings: use unevaluatedProperties: false instead of
   additionalProperties: false (Conor Dooley, sashiko-bot).
 - driver: drop the <linux/mod_devicetable.h> include and use a named
   initializer for the i2c_device_id table (Uwe Kleine-König).
 - driver: use an int for ret in lt8491_get_property() so readings
   >= 0x8000 are not treated as errors (sashiko-bot).
 - driver: register the power supply with
   devm_power_supply_register() (sashiko-bot).
 - driver: poll the telemetry-active bit after triggering a telemetry
   update (sashiko-bot).
 - driver: bounds-check the temperature limits and the resistor
   configuration values before truncating them into registers
   (sashiko-bot).
 - driver: write the 16-bit resistor configuration registers as two
   byte writes, as the device has no word-write transaction.
 - driver: report current_now in microamps.
 - driver: return -ENODATA for the temperature when the chip reports
   the not-measured-yet (0x7FFF) or thermistor-disconnected (0x7777)
   values.
 - driver: minor cleanups.

Tested on a DC2703A-A-KIT evaluation board with a Raspberry Pi 4B
(6.12-based vendor kernel) with no battery connected; charging was not
tested, nor were the two special temperature values above. Build-tested
against the power-supply for-next tree.

John Erasmus Mari Geronimo (2):
  dt-bindings: power: supply: add adi,lt8491.yaml
  power: supply: add LT8491 battery charger driver

 .../bindings/power/supply/adi,lt8491.yaml     |  92 ++++
 MAINTAINERS                                   |   7 +
 drivers/power/supply/Kconfig                  |   9 +
 drivers/power/supply/Makefile                 |   1 +
 drivers/power/supply/lt8491_charger.c         | 428 ++++++++++++++++++
 5 files changed, 537 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/adi,lt8491.yaml
 create mode 100644 drivers/power/supply/lt8491_charger.c


base-commit: f0f400459bf6a037e70768de623fff3f8920b8bb
-- 
2.34.1