[PATCH/RFC v2 0/8] LED / flash API integration

[Jacek Anaszewski <j.anaszewski@samsung.com>]

This is is a second version of the patch series being a follow up
of the discussion on Media summit 2013-10-23, related to the
LED / flash API integration (the notes from the discussion were
enclosed in the message [1], paragraph 5).
The series is based on linux-next next-20140328 and contains
significant number of modifications in comparison to its first
version (Lee, Richard and Sakari - thanks for the review).

In order to show the exemplary usage of the proposed mechanism
the patch series includes implementation of a Flash LED device
driver along with the suitable modifications in a media controller
driver.

Description of the proposed modifications according to
the kernel components they are relevant to:
    - LED subsystem modifications
        * added led_flash module which, when enabled in the config,
	  registers flash specific sysfs attributes:
            - flash_brightness
	    - max_flash_brightness
            - flash_timeout
            - max_flash_timeout
	    - flash_strobe
            - flash_fault
            - hw_triggered
	and exposes kernel internal API
            - led_set_flash_strobe
            - led_get_flash_strobe
            - led_set_flash_brightness
            - led_update_flash_brightness
            - led_set_flash_timeout
            - led_get_flash_fault
            - led_set_hw_triggered
            - led_sysfs_lock
            - led_sysfs_unlock
    - Addition of a V4L2 Flash sub-device registration helpers
        * added v4l2-flash.c and v4l2-flash.h files with helper
          functions that facilitate registration/unregistration
          of a subdevice, which wrapps a LED subsystem device and
          exposes V4L2 Flash control interface
    - exynos4-is media controller modifications
    - Addition of a driver for the flash cell of the MAX77693 mfd
        * the driver exploits the newly introduced mechanism
    - Update of the samsung-fimc.txt DT bindings documentation
    - Update of the max77693.txt DT bindings documentation
    - Update of the LED subsystem documentation

Thanks,
Jacek Anaszewski

[1] http://www.spinics.net/lists/linux-media/msg69253.html

Jacek Anaszewski (8):
  leds: Add sysfs and kernel internal API for flash LEDs
  leds: Improve and export led_update_brightness function
  Documentation: leds: Add description of flash mode
  leds: Add support for max77693 mfd flash cell
  DT: Add documentation for the mfd Maxim max77693 flash cell
  media: Add registration helpers for V4L2 flash sub-devices
  media: exynos4-is: Add support for v4l2-flash subdevs
  DT: Add documentation for exynos4-is camera-flash property

 .../devicetree/bindings/media/samsung-fimc.txt     |    3 +
 Documentation/devicetree/bindings/mfd/max77693.txt |   47 ++
 Documentation/leds/leds-class.txt                  |   52 ++
 drivers/leds/Kconfig                               |   18 +
 drivers/leds/Makefile                              |    2 +
 drivers/leds/led-class.c                           |   62 +-
 drivers/leds/led-core.c                            |   17 +
 drivers/leds/led-flash.c                           |  375 +++++++++
 drivers/leds/led-triggers.c                        |   16 +-
 drivers/leds/leds-max77693.c                       |  864 ++++++++++++++++++++
 drivers/leds/leds.h                                |    3 +
 drivers/media/platform/exynos4-is/media-dev.c      |   34 +-
 drivers/media/platform/exynos4-is/media-dev.h      |   14 +-
 drivers/media/v4l2-core/Kconfig                    |   10 +
 drivers/media/v4l2-core/Makefile                   |    2 +
 drivers/media/v4l2-core/v4l2-flash.c               |  302 +++++++
 drivers/mfd/max77693.c                             |    3 +-
 include/linux/leds.h                               |   34 +-
 include/linux/leds_flash.h                         |  189 +++++
 include/linux/mfd/max77693.h                       |   32 +
 include/media/v4l2-flash.h                         |  104 +++
 21 files changed, 2157 insertions(+), 26 deletions(-)
 create mode 100644 drivers/leds/led-flash.c
 create mode 100644 drivers/leds/leds-max77693.c
 create mode 100644 drivers/media/v4l2-core/v4l2-flash.c
 create mode 100644 include/linux/leds_flash.h
 create mode 100644 include/media/v4l2-flash.h

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1.7.9.5