On Sun, 16 Feb 2020, Jeff LaBundy wrote:

This patch adds core support for the Azoteq IQS620A, IQS621, IQS622,
IQS624 and IQS625 multi-function sensors.

Signed-off-by: Jeff LaBundy <redacted>
---
Changes in v5:
  - Merged iqs62x-core.c and iqs62x-tables.c into a single iqs62x.c
  - Corrected spelling of "data sheet" to "datasheet"
  - Added one line of whitespace in various places to improve readability
  - Replaced iqs62x->map with iqs62x->regmap throughout
  - Added the prox_settings member to the iqs62x_dev_desc struct and eliminated
    the ternary operator in iqs62x_dev_init to determine SAR UI enable register
    address
  - Added a comment in iqs62x_dev_init to explain the background for the bounds
    checking done on the IQS624/625 interval divider
  - Added #defines for the delays used within iqs62x_dev_init
  - Renamed iqs62x_fw_prs and iqs62x_fw_cb to iqs62x_firmware_parse and
    iqs62x_firmware_load, respectively
  - Updated the call to devm_mfd_add_devices to use PLATFORM_DEVID_NONE instead
    of -1 and printed "sub-devices" instead of "devices" in the error message
  - Dropped #defines for mfd_cell names in favor of the actual string names and
    collapsed mfd_cells with no other members into one line
  - Demoted iqs62x_devs to a static array as it is not used by any sub-devices
  - Removed unnecessary { IQS620A_DEV, ... } enum and IQS62X_NUM_DEV #define
  - Removed the soft reset and associated delay in iqs62x_probe to preserve any
    PWM-related changes made by a bootloader
  - Updated the comments in iqs62x_probe to highlight the significance of blank
    calibration registers and why the outer loop may be exited early
  - Made the first call to regmap_update_bits in iqs62x_suspend consistent with
    other instances in the series that set a single bit by passing all ones for
    the value instead of the mask

Changes in v4:
  - None

Changes in v3:
  - None

Changes in v2:
  - Merged 'Copyright' and 'Author' lines into one in introductory comments
  - Replaced 'error' with 'ret' throughout
  - Updated iqs62x_dev_init to account for 4/8/16-MHz clock divider in start-up
    delays and replaced ATI timeout routine with regmap_read_poll_timeout
  - Added an error message to iqs62x_irq in case device status fails to be read
  - Replaced sw_num member of iqs62x_core with a local variable in iqs62x_probe
    as the former was unused anywhere else
  - Added comments throughout iqs62x_probe to clarify how devices are matched
    based on the presence of calibration data
  - Inverted the product and software number comparison logic in iqs62x_probe
    to avoid an else...continue branch
  - Changed iqs62x_probe from .probe callback to .probe_new callback, thereby
    eliminating the otherwise unused iqs62x_id array
  - Moved iqs62x_suspend and iqs62x_resume below iqs62x_remove
  - Eliminated tabbed alignment of regmap_config and i2c_driver struct members
  - Added register definitions for register addresses used in iqs621_cal_regs,
    iqs620at_cal_regs and iqs62x_devs arrays
  - Removed of_compatible string from IQS622 mfd_cell struct as its proximity
    (now ambient light) sensing functionality need not be represented using a
    child node
  - Dissolved union in iqs62x_event_data to allow simultaneous use of ir_flags
    and als_flags
  - Removed temp_flags member of iqs62x_event_data, IQS62X_EVENT_TEMP register
    enumeration and IQS62X_EVENT_UI_HI/LO from iqs620a_event_regs (thereby re-
    ducing IQS62X_EVENT_SIZE to 10) as they were unused

 drivers/mfd/Kconfig        |   13 +
 drivers/mfd/Makefile       |    1 +
 drivers/mfd/iqs62x.c       | 1063 ++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/iqs62x.h |  139 ++++++
 4 files changed, 1216 insertions(+)
 create mode 100644 drivers/mfd/iqs62x.c
 create mode 100644 include/linux/mfd/iqs62x.h

Well done Jeff.  Good job.

Applied, thanks.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
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