iio: cm36651: Add CM36651 proximity/light sensor

hello all,

Thank you for your comments. I have revised some issues of v6 revision.

This patch is the seventh revision for Capella CM36651 proximity and RGB light sensor driver. The driver exposes five channels: Red, Green, Blue, Clear and proximity.
It also support detection proximity event.

This driver supports:
- Event: rising and falling proximity events.
- Reading channel through read_raw callback.
- Writing sensor data integration time each channel through write_raw callback.

Changes from v7 to v6:
- Add a new entry in alphabetical order at Makefile
- Remove/revise some goto
- Include linux/err.h

Changes form v6 to v5:
- Remove enable/disable_irq APIs.
- Add some macros.
- Code cleanup

Changes from v5 to v4:
- Use *_REG_NUM macro at size of array.
- Revised error handling in probe function.

Changes from v4 to v3:
- Revised a binding documentation.
- Add description to cm36651.txt
- Revised proximitysensor duty_ratio Macros.
- Fix be wrote register value.
- Fix return value at cm36651_read_raw function.
- Remove double space and blank line.
- Remove some APIs. (IIO_EVENT_EXTRACT_*)
- Remove some check code and unnecessary dbg/err message.
- code cleanup

Changes from v3 to v2:
- Revised a binding documentation.
- fixed vendor-prefixes documentation in alphabetical order.
- Add/ Remove/ Revise some #define register and commands.
- Add write_raw callback function for set/get sensor data integration time.
- Use IIO_CONST_ATTR API for *_integration_time_available.
- Revised some comments and message.
- Code cleanup

Changes from v2 to v1:
- Add a new entry in alphabetical order at Kconfig.
- Use #define register and commands.
- Use CM36651_* prefix.
- Use i2c_smbus_* APIs.
- Fix cm36651_read_output() function.
- Code cleanup

From: Beomho Seo <[email protected]>
Date: Thu, 17 Oct 2013 10:51:28 +0900
Subject: [PATCH 0/2] *** SUBJECT HERE ***

*** BLURB HERE ***

Beomho Seo (2):
iio: cm36651: Add CM36651 proximity/light sensor
DT: Add documentation for cm36651 proximity/light sensor

 .../devicetree/bindings/iio/light/cm36651.txt      |   26 +
 .../devicetree/bindings/vendor-prefixes.txt        |    1 +
 drivers/iio/light/Kconfig                          |   11 +
 drivers/iio/light/Makefile                         |    1 +
 drivers/iio/light/cm36651.c                        |  708 ++++++++++++++++++++
 5 files changed, 747 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/light/cm36651.txt
 create mode 100644 drivers/iio/light/cm36651.c

1.7.9.5

-- 
Best Regards,

Beomho Seo, Assistant Engineer
System S/W Lab., S/W Platform Team, Software Center
Samsung Electronics