linux-kernel - [PATCH v8 0/6] w1: ds2438: adding support for calibration of current measurements

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Message-Id: <20210519223046.13798-1-sampaio.ime@gmail.com>
Date:   Wed, 19 May 2021 19:30:40 -0300
From:   Luiz Sampaio <sampaio.ime@...il.com>
To:     zbr@...emap.net
Cc:     corbet@....net, rikard.falkeborn@...il.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, Luiz Sampaio <sampaio.ime@...il.com>
Subject: [PATCH v8 0/6] w1: ds2438: adding support for calibration of current measurements

The following patches aim to make a user able to calibrate the current
measurement of the DS2438. This chip uses a offset register in page1, which
is added to the current register to give the user the current measurement.
If this value is wrong, the user will get an offset current value, even if
the current is zero, for instance. This patch gives support for reading the
page1 registers (including the offset register) and for writing to the
offset register. The DS2438 datasheet shows a calibration routine, and with
this patch, the user can do this quickly by writing the correct value to
the offset register. This patch was tested on real hardware using a power
supply and an electronic load.
Please help to review this series of patches.

Best regards!
Sampaio
---
Changes in v8:
- Fixing bot identation warning

Changes in v7:
- Build test again

Changes in v6:
- Actually changing from BIN_ATTR to BIN_ATTR_RW

---
Changes in v5:
- Merged all brackets coding style issue in one patch
- Changing from BIN_ATTR to BIN_ATTR_RW in w1_ds2438.c
- Wrapping email lines
- Addind Documentation/ABI/

Changes in v4:
- Fixing different patches with identical subject lines as requested

Changes in v3:
- I accidentally added a wrong line that would not compile. I'm sorry. Fixed it.

Changes in v2:
- Using git send-email to send the patches
- Adding documentation as requested
- Separating the coding style changes in different patches as requested

Luiz Sampaio (6):
  w1: ds2438: fixed a coding style issue
  w1: ds2438: fixed if brackets coding style issue
  w1: ds2438: changed sysfs macro for rw file
  w1: ds2438: fixing bug that would always get page0
  w1: ds2438: adding support for reading page1
  w1: ds2438: support for writing to offset register

 .../ABI/stable/sysfs-driver-w1_ds2438         |  13 ++
 Documentation/w1/slaves/w1_ds2438.rst         |  19 ++-
 drivers/w1/slaves/w1_ds2438.c                 | 122 +++++++++++++++---
 3 files changed, 137 insertions(+), 17 deletions(-)
 create mode 100644 Documentation/ABI/stable/sysfs-driver-w1_ds2438

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2.30.1