linux-kernel - [PATCH v3 0/2] Adding support for Microchip MCP3564 ADC family

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Message-ID: <20230804142820.89593-1-marius.cristea@microchip.com>
Date:   Fri, 4 Aug 2023 17:28:18 +0300
From:   <marius.cristea@...rochip.com>
To:     <jic23@...nel.org>, <lars@...afoo.de>, <robh+dt@...nel.org>
CC:     <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <marius.cristea@...rochip.com>
Subject: [PATCH v3 0/2] Adding support for Microchip MCP3564 ADC family

From: Marius Cristea <marius.cristea@...rochip.com>

Adding support for Microchip family of 153.6 ksps, Low-Noise 16/24-Bit
Delta-Sigma ADCs with an SPI interface. This driver covers the following part
numbers:
 - MCP3561, MCP3562, MCP3564, MCP3561R, MCP3562R, MCP3564R,
 - MCP3461, MCP3462, MCP3464, MCP3461R, MCP3462R and MCP3464R.

Differences related to previous patch:
v3:
- fix review comments:
  - fix and update the device tree bindings
  - enable "auto_zeroing_ref_enable" attribute only
    when internal reference is used
  - remove unused headers
  - fix comments (kernel-docs)
  - remove scan_type
  - replace "extend_name" with read_label
  - print label for each channel (label could be added into the dt)
  - add comment to explain the maximum channels numbers
  - add protection around critical region
  - fallback compatible in device tree to deal with some newer part number
  
- Open questions:
  - whether or not to add a spi-mux type of thing to deal with the part number
    address in case there are multiple devices connected to the same chip
    select.
  - discussion related to the "custom property". Last time around a consensus
    wasn't reached. 

v2:
- fix review comments:
  - change the device tree bindings
  - change the ADC channel creation (starting from DT)
  - use defines, masks and FIELD_PREP() instead of hardcoded values
  - mode the PGA from Hardware Gain to scale
  - add a current output channel from burnout current
  - fix coding style issues
  - use self-explanatory naming to drop the comment 
- renumbered the versioning (start with v1 instead of v0)

v1:
- first version committed to review

Marius Cristea (2):
  dt-bindings: iio: adc: adding MCP3564 ADC
  iio: adc: adding support for MCP3564 ADC

 .../ABI/testing/sysfs-bus-iio-adc-mcp3564     |   53 +
 .../bindings/iio/adc/microchip,mcp3564.yaml   |  200 +++
 MAINTAINERS                                   |    7 +
 drivers/iio/adc/Kconfig                       |   13 +
 drivers/iio/adc/Makefile                      |    1 +
 drivers/iio/adc/mcp3564.c                     | 1541 +++++++++++++++++
 6 files changed, 1815 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-adc-mcp3564
 create mode 100644 Documentation/devicetree/bindings/iio/adc/microchip,mcp3564.yaml
 create mode 100644 drivers/iio/adc/mcp3564.c


base-commit: 9e66fb52449538406cea43e9f3889c391350e76e
-- 
2.34.1