linux-kernel - [PATCH v5 0/5] Introduce MAX77759 charger driver

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Message-Id: <20260203-max77759-charger-v5-0-b50395376a5f@google.com>
Date: Tue, 03 Feb 2026 22:50:26 +0000
From: Amit Sunil Dhamne via B4 Relay <devnull+amitsd.google.com@...nel.org>
To: Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 André Draszik <andre.draszik@...aro.org>, 
 Lee Jones <lee@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Badhri Jagan Sridharan <badhri@...gle.com>, 
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Peter Griffin <peter.griffin@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-usb@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 RD Babiera <rdbabiera@...gle.com>, Kyle Tso <kyletso@...gle.com>, 
 Amit Sunil Dhamne <amitsd@...gle.com>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
Subject: [PATCH v5 0/5] Introduce MAX77759 charger driver

MAX77759 PMIC is used in Pixel 6 and 6 Pro (Oriole/Raven) boards.
One of the functions of the MAX77759 PMIC is a battery charger. This
patchset introduces a driver for this function. One of the unique
features of this charger driver is that it works with a USB input where
the Type-C controller is TCPCI based.

Changes to the board files will follow soon once this patchset is reviewed.

For reference to the MAX77759 MFD based patchset (present in upstream):
https://lore.kernel.org/all/20250509-max77759-mfd-v10-0-962ac15ee3ef@linaro.org/

Dependency list:
Patch 5 depends on Patch 4 which depends on Patch 3.

Signed-off-by: Amit Sunil Dhamne <amitsd@...gle.com>
---
Changes in v5:
- Use linear_range library instead of reinventing it. (André Draszik)
  - This requires a selector_max value so modified mfd/max77759.h to
    include it for CHGCC and CHG_ILIM.
  - Removed "reviewed-by" for Patch 3 (mfd) due to above
- Use asnyc probe type. (André Draszik)
- Retry mechanism for psy_work. (André Draszik)
- Minor nits (André Draszik):
  - Use named initializers for instantiating structs.
  - Use static qualifier for `psy_name` variable.
  - Refactor if-else ladder to remove else handling if return in prior
    "if" loop.
  - Remove redundant `unlikely`.
- Link to v4: https://lore.kernel.org/r/20260121-max77759-charger-v4-0-694234c8ded1@google.com

Changes in v4:
- Removed a stray tabspace in mfd/max77759.h. (André Draszik)
- Fixed the following issues in Patch 4/5 (André Draszik):
  - Re-order Kconfig entry
  - Refactored to not use global variable
  - Use of clamp() to clamp values instead of duplicating logic
  - Return IRQ_NONE for unhandled irqs or error conditions
  - Remove debug messages in irq handler
  - Refactor code to use dev_err_probe in *_init_irqhandler()
  - Remove unneeded irq_flags
  - Check return values of regmap ops
  - Other nits like newlines, not using greedy init, using print stmnts
- Link to v3: https://lore.kernel.org/r/20251227-max77759-charger-v3-0-54e664f5ca92@google.com

Changes in v3:
- Had incorrectly folded the charger sub-device with the pmic parent.
  Corrected it. (Krzysztof Kozlowski)
- Link to v2: https://lore.kernel.org/r/20251218-max77759-charger-v2-0-2b259980a686@google.com

Changes in v2:
- Fold charger binding in maxim,max77759-charger.yaml to its parent
  node. (Krzysztof Kozlowski)
- Renamed regulator supplier & consumer. (Krzysztof Kozlowski & Heikki
  Krogerus)
- Removed explicit setting of irq trigger types in max77759 driver.
  (André Draszik & Krzysztof Kozlowski)
- Complete bit definitions for IRQ registers. (André Draszik)
- Consolidate all bit definitions for charger IP in mfd/max77759.h.
  (André Draszik)
- Modify the handling of charger IRQs such that regmap IRQ chip handles
  masking, de-mux and acking of interrupts. (André Draszik)
- Remove unused macro definitions relating to Charger modes in tcpci
  maxim driver (André Draszik)
- Add dependency on Regulator class in Kconfig definition for max77759
  chg. (Kernel Test Robot)
- Link to v1: https://lore.kernel.org/r/20251123-max77759-charger-v1-0-6b2e4b8f7f54@google.com

---
Amit Sunil Dhamne (5):
      dt-bindings: mfd: maxim,max77759: reference power-supply schema and add regulator property
      dt-bindings: usb: maxim,max33359: Add supply property for vbus
      mfd: max77759: add register bitmasks and modify irq configs for charger
      power: supply: max77759: add charger driver
      usb: typec: tcpm/tcpci_maxim: deprecate WAR for setting charger mode

 .../devicetree/bindings/mfd/maxim,max77759.yaml    |  16 +-
 .../devicetree/bindings/usb/maxim,max33359.yaml    |   4 +
 MAINTAINERS                                        |   6 +
 drivers/mfd/max77759.c                             |  91 ++-
 drivers/power/supply/Kconfig                       |  11 +
 drivers/power/supply/Makefile                      |   1 +
 drivers/power/supply/max77759_charger.c            | 777 +++++++++++++++++++++
 drivers/usb/typec/tcpm/tcpci_maxim.h               |   1 +
 drivers/usb/typec/tcpm/tcpci_maxim_core.c          |  54 +-
 include/linux/mfd/max77759.h                       | 204 +++++-
 10 files changed, 1106 insertions(+), 59 deletions(-)
---
base-commit: 8dfce8991b95d8625d0a1d2896e42f93b9d7f68d
change-id: 20251105-max77759-charger-852b626d661a

Best regards,
-- 
Amit Sunil Dhamne <amitsd@...gle.com>