[PATCH v4 2/2] add w1_ds28e17 driver for the DS28E17 Onewire to I2C master bridge

[Jan Kandziora]

Changes in v4 against v3 in this subpatch:
  - adapted to linux-4.12.0

Changes in v3 against v2 in this subpatch:
  - fixed a bug in using the i2c_adapter_quirks structure

Changes in v2 against v1 in this subpatch:
  - added error handling in w1_f19_error()
  - added struct i2c_adapter_quirks
  - removed unnecessary checks of I2C address and read count
  - cleaned up error codes
    + EOPNOTSUPP for read/write count == 0
    + ETIMEDOUT for busy timeout
    + ENXIO for no reply of I2C slave
    + EAGAIN for I2C invalid start condition
    + EIO for all w1 errors
  - devm_kzalloc() instead of kzalloc()
  - i2c speed to be set as 100, 400, 900 instead of 0, 1, 2
  - added driver parameter documentation
  - added sysfs documentation
  - Kconfig fixed


This subpatch adds a driver for the DS28E17 Onewire to I2C master bridge.

Signed-off-by: Jan Kandziora <jjj@xxxxxx>
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