linux-kernel - [PATCH v2 0/2] Pinefeat cef168 lens control board driver

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Message-Id: <20250811213102.15703-1-aliaksandr.smirnou@gmail.com>
Date: Mon, 11 Aug 2025 22:31:00 +0100
From: Alexander Smirnov <asmirnou@...efeat.co.uk>
To: mchehab@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: devicetree@...r.kernel.org,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Aliaksandr Smirnou <support@...efeat.co.uk>
Subject: [PATCH v2 0/2] Pinefeat cef168 lens control board driver

From: Aliaksandr Smirnou <support@...efeat.co.uk>

This patch series adds support for the Pinefeat adapter, which interfaces
Canon EF and EF-S lenses to non-Canon camera bodies. The cef168 circuit
control board provides an I2C interface for electronic focus and aperture
control. The driver integrates with the V4L2 sub-device API.

For more information about the product, see:
https://github.com/pinefeat/cef168

There are no regulators on the board. The MCU is powered by 3.3V, which is
supplied either through the CSI connector or the serial connector directly
from the Raspberry Pi GPIO power pins. Hence, the driver lacks any regulator
handling. Please let me know if regulator support is still needed.

Changes in v2:
 in [PATCH 1/2] addressed review comments:
 - added optional vcc-supply property and example
 - made node name generic in the example
 - removed tree type and location from maintainers entry

 in [PATCH 2/2] addressed review comments:
 - wrapped devm_kzalloc line according to coding style
 - removed oddly formed i2c_device_id struct as not required
 - formatted of_device_id struct according to coding style

Link to v1: https://lore.kernel.org/all/20250810192609.11966-1-support@pinefeat.co.uk/

Patches:
  dt-bindings: Pinefeat cef168 lens control board
  media/i2c: Pinefeat cef168 lens control board driver

 .../bindings/media/i2c/pinefeat,cef168.yaml   |  52 +++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |   8 +
 drivers/media/i2c/Kconfig                     |   8 +
 drivers/media/i2c/Makefile                    |   1 +
 drivers/media/i2c/cef168.c                    | 337 ++++++++++++++++++
 drivers/media/i2c/cef168.h                    |  51 +++
 7 files changed, 459 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/pinefeat,cef168.yaml
 create mode 100644 drivers/media/i2c/cef168.c
 create mode 100644 drivers/media/i2c/cef168.h


base-commit: 2b38afce25c4e1b8f943ff4f0a2b51d6c40f2ed2
-- 
2.34.1