[PATCH v6 0/4] iio: accel: adxl345: Split driver into core and I2C then add SPI support

[Eva Rachel Retuya <eraretuya@gmail.com>]

This patchset modifies the adxl345 to use regmap. In doing so, we can
easily introduce SPI support and let regmap handle the rest.

Recap of basic features: read_raw for x, y and z axes, scale. After
applying this series, driver now supports the SPI protocol and enumeration
of device via device tree.

Changes from v5:
[PATCH 1/4]
* Add Rob's Acked-by tag
[PATCH 2/4]
* Re-order local variable declarations from longest to shortest line
* Remove explicit casting to int in handling devm_regmap_init_i2c() error,
  use %ld instead
[PATCH 3/4]
* Simplify configuration dependency to "depends on INPUT_ADXL34X=n"
* Rename functions from *_common_* to *_core_*
* Modify header comment: place indication at the beginning
* Remove explicit casting to int in handling devm_regmap_init_i2c() error,
  use %ld instead
* Remove temporary variable 'name'
[PATCH 4/4]
* Simplify configuration dependency to "depends on INPUT_ADXL34X=n"
* Modify header comment: place indication at the beginning
* Re-order local variable declarations from longest to shortest line
* Remove explicit casting to int in handling devm_regmap_init_spi() error,
  use %ld instead
* Rename functions calls from *_common_* to *_core_*

Changes from v4:
* Update subject-prefix of [PATCH 1/4]
* Update node name from "adxl345@unit-address" to "accelerometer@unit-address"
* Add Andy's Reviewed-by tag

Changes from v3:
[PATCH 1/4]
* None
[PATCH 2/4]
* Keep intact I2C client structure which was deleted from v3
* Make use of regmap_get_device to retrieve struct device, use these for
  debugging prints instead of &client->dev.
[PATCH 3/4] and [PATCH 4/4]
* Revert to explicit and separate I2C and SPI configuration
* Add OF match table, make it enumerable in ACPI environment (Andy's suggestion)

Changes from v2:
* Drop PATCH 4 iio: accel: adxl345: Add ACPI support
* Add OF match table on both I2C and SPI files and document them

Changes from v1:
[PATCH 1/4]
* Move other deletions from patch 2 in here -- make it clear what got deleted
  and/or modified that is hard to see previously
* Introduce the driver header file "adxl345.h" here instead of doing it in the
  next patch
* Completely omit traces of i2c_client and let this file (adxl345.c) mirror the
  core file on the next patch.
* Improve debugging print about invalid device ID in probe.
[PATCH 2/4]
* Update Kconfig to Jonathan's preferred style
* Improve similarity index from 78% to 100% (rename detection)
[PATCH 4/4]
* Correct acpi_device_id: ADX0345 -> ADS0345

Eva Rachel Retuya (4):
  dt-bindings: iio: accel: Document ADXL345 accelerometer binding
  iio: accel: adxl345: Use I2C regmap instead of direct I2C access
  iio: accel: adxl345: Split driver into core and I2C
  iio: accel: adxl345: Add SPI support

 .../devicetree/bindings/iio/accel/adxl345.txt      | 38 +++++++++
 drivers/iio/accel/Kconfig                          | 28 ++++++-
 drivers/iio/accel/Makefile                         |  4 +-
 drivers/iio/accel/adxl345.h                        | 18 +++++
 drivers/iio/accel/{adxl345.c => adxl345_core.c}    | 91 +++++++++-------------
 drivers/iio/accel/adxl345_i2c.c                    | 73 +++++++++++++++++
 drivers/iio/accel/adxl345_spi.c                    | 81 +++++++++++++++++++
 7 files changed, 275 insertions(+), 58 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/iio/accel/adxl345.txt
 create mode 100644 drivers/iio/accel/adxl345.h
 rename drivers/iio/accel/{adxl345.c => adxl345_core.c} (61%)
 create mode 100644 drivers/iio/accel/adxl345_i2c.c
 create mode 100644 drivers/iio/accel/adxl345_spi.c

-- 
2.7.4