linux-kernel - [PATCH v7 0/8] iio: accel: adxl345: Add spi-3wire feature

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Date: Mon,  1 Apr 2024 19:48:58 +0000
From: Lothar Rubusch <l.rubusch@...il.com>
To: lars@...afoo.de,
	Michael.Hennerich@...log.com,
	jic23@...nel.org,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org
Cc: linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	eraretuya@...il.com,
	l.rubusch@...il.com
Subject: [PATCH v7 0/8]  iio: accel: adxl345: Add spi-3wire feature

Pass a function setup() as pointer from SPI/I2C specific modules to the
core module. Implement setup() to pass the spi-3wire bus option, if
declared in the device-tree.

In the core module then update data_format register configuration bits
instead of overwriting it. The changes allow to remove a data_range field.

Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
---
V1 -> V2: Split into spi-3wire and refactoring
V2 -> V3: Split further, focus on needed changesets
V3 -> V4: Drop "Remove single info instances";
          split "Group bus configuration" into separat
          comment patch; reorder patch set
V4 -> V5: Refrase comments; Align comments to 75; rebuild FORMAT_MASK by
          available flags; fix indention
V5 -> V6: Remove FORMAT_MASK by a local variable on call site;
          Refrase comments;
          Remove unneeded include
V6 -> V7: Restructure optional passing the setup() to core's probe()
          Guarantee that initially a regmap_write() was called to init
          all bits to a defined state
          - When a setup() e.g. for 3wire is passed, then call
            regmap_write() inside the setup(). In the following
            core's probe() has to call regmap_update()
          - When NULL is passed, then call regmap_write() in core's
            probe()
          - Refactoring: remove obvious comments and simplify code

Lothar Rubusch (8):
  iio: accel: adxl345: Make data_range obsolete
  iio: accel: adxl345: Group bus configuration
  iio: accel: adxl345: Move defines to header
  dt-bindings: iio: accel: adxl345: Add spi-3wire
  iio: accel: adxl345: Pass function pointer to core
  iio: accel: adxl345: Reorder probe initialization
  iio: accel: adxl345: Add comment to probe
  iio: accel: adxl345: Add spi-3wire option

 .../bindings/iio/accel/adi,adxl345.yaml       |  2 +
 drivers/iio/accel/adxl345.h                   | 36 +++++++-
 drivers/iio/accel/adxl345_core.c              | 92 ++++++++++---------
 drivers/iio/accel/adxl345_i2c.c               |  2 +-
 drivers/iio/accel/adxl345_spi.c               | 10 +-
 5 files changed, 94 insertions(+), 48 deletions(-)

-- 
2.25.1