linux-kernel - [PATCH v6 0/2] Variety of fixes and new features for mr75203 driver

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Date:   Wed, 21 Sep 2022 12:18:42 +0000
From:   Eliav Farber <farbere@...zon.com>
To:     <jdelvare@...e.com>, <linux@...ck-us.net>,
        <linux-hwmon@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <andriy.shevchenko@...el.com>, <sudipm.mukherjee@...il.com>
CC:     <farbere@...zon.com>, <hhhawa@...zon.com>, <jonnyc@...zon.com>
Subject: [PATCH v6 0/2] Variety of fixes and new features for mr75203 driver

List of fixes:
 - Fix "intel,vm-map" property to be optional.
 - Fix VM sensor allocation when "intel,vm-map" not defined.
 - Fix multi-channel voltage reading.
 - Fix voltage equation for negative source input.
 - Modify the temperature equation according to series 5 datasheet.
 - Fix coding style issue.

List of new features:
 - Modify "reset" property to be optional.
 - Add optional "moortec,vm-active-channels" property to define the number
   of active channels per VM.
 - Add support for mr76006 pre-scaler to multiply the voltage result by 2.
 - Add support for series 6 temperature equation.
 - Add coefficient properties to fine tune the temperature equation.
 - Add debugfs to read and write temperature coefficients

---------

Changes between v5 and v6:
- fix undefined reference to `__divdi3' for 32-bit machines.

!!! Note: The patches of this series were pushed to hwmon-next and then
I got an automatic reply saying that these patches failed on some builds.
I sent separately an incremental patch which fixes the problem, and in
addition these two "replacement" patches for you do choose the option
you prefer. !!!

Changes between v4 and v5:
- 0004: Add detailed comment in code explaining the cast and the div instead of
  right shift or use of BIT().
- 0011: Fix typo in description (nou --> not).
- 0020: Return j coefficient to use debugfs_create_file() instead of
  debugfs_create_u32() because j is signed.
- 0021: Move the coding style patch to be last in the series (it does not fix
  the code), and remove the "Fixes:" tag.

Changes between v3 and v4:
*) Provide a Fixes tag for all fixes in the series.
*) Start series with fixes.
*) New patch to add description in moortec,mr75203.yaml.
*) New patch to add moortec to vendor-prefixes.
*) Fix moortec,mr75203.yaml checker errors.
*) Remove validation of device-tree parameters.
*) Fix per patch specific comments (detailed in each patch).

Changes between v2 and v3:
*) Add "moortec" prefix to all new device-tree properties.
*) Change order of patches.
*) Add explanations to better understand the changes.
*) Change "reset" property to be optional and remove the
  "reset-control-skip" property.
*) Split the patch for "fix multi-channel voltage reading" to two
   patches.
*) Change pre-scaler property format and fix typo (scalar --> scaler).
*) Fix voltage equation to support negative values instead of limiting
   value to zero.
*) Temperature equation - protect from overflow and add clamping.
*) Add new "moortec,ts-series" property to select between temperature
   equation of series 5 or series 6.

Changes between v1 and v2:
 *) Fix compilation error for patch 08/16:
    "warning: ISO C90 forbids variable length array"

---------

Eliav Farber (2):
  hwmon: (mr75203) modify the temperature equation according to series 5
    datasheet
  hwmon: (mr75203) add support for series 6 temperature equation

 drivers/hwmon/mr75203.c | 91 +++++++++++++++++++++++++++++++++++++----
 1 file changed, 83 insertions(+), 8 deletions(-)

-- 
2.37.1