linux-kernel - [PATCH v5 0/5] iio: mcp9600: Features and improvements

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Message-Id: <20250818183214.380847-1-bcollins@kernel.org>
Date: Mon, 18 Aug 2025 14:32:08 -0400
From: Ben Collins <bcollins@...nel.org>
To: linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Ben Collins <bcollins@...ter.com>,
	Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sa <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Andrew Hepp <andrew.hepp@...pp.dev>
Subject: [PATCH v5 0/5] iio: mcp9600: Features and improvements

From: Ben Collins <bcollins@...ter.com>

ChangeLog:
v5 -> v6:
  - Fix accidental typo added in dt-bindings: IRQ_TYPE_EDGE_RISIN
  - Correct some constraints in dt-bindings
  - Reverse if/then for mcp9601 vs mcp9600 constraints in dt-bindings
  - Updates to changelog for patch 2/6 (dt-bindings mcp9600)
  - Cleanup tabs that were converted to spaces
  - Split thermocouple-type default to separate patch

v4 -> v5:
  - Missed a one line fix to IIR patch (5/5)

v3 -> v4:
  - Based on feedback from David Lechner <dlechner@...libre.com>
    * Allow fallback compatible in dt-bindings for mcp9601.
  - Based on feedback from Jonathan Cameron <jic23@...nel.org>
    * Be explicit in patch description for fixed width changes.
    * Check chip_info for NULL to quiet warnings from kernel-test-robot
    * Remove "and similar" for long description of MCP9600.
  - Based on lots of feedback, use frequency values for IIR, and use
    filter_type[none, ema] to enable or disable.
  - Set default 3 for thermocouple in dt-binding
  - Rework open/short circuit in dt-bindings

v2 -> v3:
  - Improve changelogs in each patch
  - Based on feedback from Andy Shevchenko <andy.shevchenko@...il.com>
    * Set register offsets to fixed width
    * Fix typos
    * Future-proof Kconfig changes
    * Convert to using chip_info paradigm
    * Verbiage: dt -> firmware description
    * Use proper specifiers and drop castings
    * Fix register offset to be fixed-width
    * u8 for cfg var
    * Fix % type for u32 to be %u
    * Make blank lines consistent between case statements
    * FIELD_PREP -> FIELD_MODIFY
    * Remove explicit setting of 0 value in filter_level
  - Based on feedback from David Lechner <dlechner@...libre.com>
    * Rework IIR values exposed to sysfs. Using the ratios, there was no
      way to represent "disabled" (i.e. infinity). Based on the bmp280
      driver I went with using the power coefficients (e.g. 1, 2, 4, 8,
      ...) where 1 is disabled (n=0).

v1 -> v2:
  - Break into individual patches

v1:
  - Initial patch to enable IIR and thermocouple-type
  - Recognize mcp9601

Ben Collins (6):
  dt-bindings: iio: mcp9600: Set default 3 for thermocouple-type
  dt-bindings: iio: mcp9600: Add microchip,mcp9601 and add constraints
  iio: mcp9600: White space and fixed width cleanup
  iio: mcp9600: Recognize chip id for mcp9601
  iio: mcp9600: Add support for thermocouple-type
  iio: mcp9600: Add support for IIR filter

 .../iio/temperature/microchip,mcp9600.yaml    |  61 +++-
 drivers/iio/temperature/Kconfig               |   8 +-
 drivers/iio/temperature/mcp9600.c             | 295 +++++++++++++++++-
 3 files changed, 341 insertions(+), 23 deletions(-)

-- 
2.39.5