linux-kernel - [PATCH v6 0/2] Add support for MAX77675 device

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Message-Id: <20251120125449.26530-1-joan.na@analog.com>
Date: Thu, 20 Nov 2025 21:54:47 +0900
From: Joan-Na-adi <joan.na.devcode@...il.com>
To: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Joan Na <joan.na@...log.com>
Subject: [PATCH v6 0/2] Add support for MAX77675 device

From: Joan Na <joan.na@...log.com>

MAX77675 regulator driver and device tree bindings

---
Changes in v6:
- Updated DT property names to use "adi," prefix
- Reference reset-time-sec from input.yaml and apply schema constraints
- Reference bias-disable and input-debounce from pincfg-node.yaml and apply schema constraints
- Improved descriptions in YAML bindings and wrapped lines to 80 chars
- Introduced bitfield macros
- Added parsing functions for EN mode, latency, slew rate, and drive strength
- Separated configuration apply logic from DT parsing function for better maintainability
- Refactored apply logic to use direct regmap updates
- Enhanced FPS slot handling with string-based mapping
- Improved probe function with resource cleanup and error handling
- Removed unnecessary header files

Changes in v5:
- Fix subject prefix order to match subsystem ('regulator: dt-bindings: ...')
- Drop unnecessary '|' from description fields
- Drop repeated constraint descriptions from YAML
- Rename 'maxim,en-debounce-time-us' to 'maxim,debounce-delay-us' for clearer naming
- Used common 'reset-time-sec' property from input.yaml
- Remove duplicate description for 'maxim,fps-slot' and wrap lines to 80 chars
- Drop the node reference immediately after registering the regulator

Changes in v4:
- Remove the 'maxim,max77675-regulator.h' file as it is no longer used for bindings
- Eliminate unnecessary '|' characters where they are not needed
- Add and modify code to drop references that are no longer used
- Remove dead code
- Add detailed descriptions for each mode of 'maxim,en-mode'
- Rename 'maxim,latency-mode' to 'maxim,voltage-change-latency-us' for clearer meaning
- Update max77675_parse_latency_mode function to max77675_parse_voltage_change_latency accordingly
- Fix errors detected by running make dt_binding_check
- Fix incorrect indentation in the YAML file

Changes in v3:
- Removed unused variable 'value'
- Removed duplicate .list_voltage initializer
- Wrapped of_match_table with of_match_ptr() to fix build failure when CONFIG_OF is not set
- Updated driver code to match new DT binding schema
- Changed regmap_config from REGCACHE_NONE to REGCACHE_MAPLE for improved performance
- Added volatile_reg() to mark status registers as non-cacheable
- Missing explanation of `maxim,fps-slot` default value
- Updated DT binding enums to use string values (e.g., "low", "high") instead of integers
- Converted several binary properties to boolean typei
- Renamed time-based properties to use standard unit suffixes (e.g., "-sec", "-us")
- Added default values for properties
- Removed unused macros
- Renamed macros for clarity

Changes in v2:
- Fixed build error due to missing 'max77675_of_match' declaration
- Removed duplicate '.list_voltage' initialization
- Corrected value usage in regmap_update_bits call
- Added CONFIG_OF guards and used of_match_ptr()
---

Joan-Na-adi (2):
  regulator: dt-bindings: Add MAX77675 regulator
  regulator: max77675: Add MAX77675 regulator driver

 .../bindings/regulator/adi,max77675.yaml      |  188 +++
 drivers/regulator/Kconfig                     |    9 +
 drivers/regulator/Makefile                    |    1 +
 drivers/regulator/max77675-regulator.c        | 1056 +++++++++++++++++
 4 files changed, 1254 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/regulator/adi,max77675.yaml
 create mode 100644 drivers/regulator/max77675-regulator.c


base-commit: 6548d364a3e850326831799d7e3ea2d7bb97ba08
--
2.34.1