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[v2,0/3] Support ROHM BU27010 RGBC sensor

Message ID cover.1688723839.git.mazziesaccount@gmail.com
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Series Support ROHM BU27010 RGBC sensor | expand

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Matti Vaittinen July 7, 2023, 11:22 a.m. UTC 
Support ROHM BU27010 RGBC + flickering sensor.

Following description copied from commit log:

> The ROHM BU27010 is an RGBC sensor with a flickering detection FIFO. The
> RGBC+IR sensor functionality is largely similar to what the BU27008 has.
> There are some notable things though:
>  - gain setting is once again new and exotic. Now, there is 6bit gain
>    setting where 4 of the bits are common to all channels and 2 bits
>    can be configured separately for each channel. The BU27010 has
>    similar "1X on other channels vs 2X on IR when selector is 0x0"
>    gain design as BU27008 had. So, we use same gain setting policy for
>    BU27010 as we did for BU27008 - driver sets same gain selector for
>    all channels but shows the gains separately for all channels so users
>    can (at least in theory) detect this 1X vs 2X madness...
>  - BU27010 has suffled all the control register bitfields to new
>    addresses and bit positions while still keeping the register naming
>    same.
>  - Some more power/reset control is added.
>  - FIFO for "flickering detection" is added.
>
> The control register suffling made this slightly nasty. Still, it is
> easier for maintenance perspective to add the BU27010 support in BU27008
> driver because - even though the bit positions/addresses were changed -
> most of the driver structure can be re-used. Writing own driver for
> BU27010 would mean plenty of duplicate code albeit a tad more clarity.

This series is done on top of the iio-for-6.5a + this fix-up series:
https://lore.kernel.org/all/cover.1686648422.git.mazziesaccount@gmail.com/

I didn't spot these fixups from iio git although I think I saw mail
stating they were applied.

Revision history:

v1 => v2:
 - make vdd-supply required binding.
 - Some re-ordering for struct member init.
 - Some re-ordering for code to get rid of function declarations.
 - Tidy up the mess from patch 2/3.
   - Refactor parts from 3/3 to 2/3.
   - Clean-up commented out code and tidy things in general.

Please note: I'll be mostly away from the computer during July. Please,
take your time reviewing and forgive me if sending follow-up revisions
is delayed.

---

Matti Vaittinen (3):
  dt-bindings: iio: ROHM BU27010 RGBC + flickering sensor
  iio: light: bu27008: add chip info
  iio: light: bd27008: Support BD27010 RGB

 .../bindings/iio/light/rohm,bu27010.yaml      |  49 ++
 drivers/iio/light/rohm-bu27008.c              | 622 ++++++++++++++----
 2 files changed, 556 insertions(+), 115 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/iio/light/rohm,bu27010.yaml