linux-kernel - [PATCH v3 0/4] hwmon: adc128d818: Support missing operation modes

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Date:   Fri,  6 Jan 2017 11:38:13 +0100
From:   Alexander Koch <mail@...xanderkoch.net>
To:     linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Michael Hornung <mhornung.linux@...il.com>,
        devicetree@...r.kernel.org, Alexander Koch <mail@...xanderkoch.net>
Subject: [PATCH v3 0/4] hwmon: adc128d818: Support missing operation modes

The ADC128D818 offers four different chip operation modes which vary in the
number and measurement types of the available input signals (see datasheet
sec. 8.4.1).

The current version of the driver only supports the default chip operation
mode (mode 0), providing seven analog values and a temperature reading.

This patch series adds support for operation modes 1-3, selectable through
the device tree attribute 'ti,mode':

        adc1: adc128d818@1d {
                compatible = "ti,adc128d818";
                reg = <0x1d>;
                mode = <1>;
        };

The changes are transparent as the driver defaults to keeping the currently
active operation mode if no mode is specified via device tree (which is
mode 0 on chip initialization).


Changes from v2:
 - Omit device attribute refactoring (for checkpatch.pl), as requested by
   maintainer
 - Add vendor prefix 'ti,' for mode property in device tree
 - Drop size indication for mode property in device tree
 - Preserve chip operation mode if none specified in devicetree
 - Fix missing '\n' in dev_err() calls

Changes from v1:
 - Add bindings document as first patch
 - Preserve logical atomicity of code changes
 - Improve sysfs device node handling (use is_visible() instead of
   duplicate attribute list)
 - Add trivial code refactoring stage for checkpatch.pl to succeed


Alexander Koch (4):
  devicetree: hwmon: Add bindings for ADC128D818
  hwmon: adc128d818: Implement mode selection via dt
  hwmon: adc128d818: Support operation modes 1-3
  hwmon: adc128d818: Preserve operation mode

 .../devicetree/bindings/hwmon/adc128d818.txt       |  39 ++++++
 drivers/hwmon/adc128d818.c                         | 147 +++++++++++++++------
 2 files changed, 149 insertions(+), 37 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/hwmon/adc128d818.txt

-- 
2.11.0