linux-kernel - [PATCH/RFC 0/8] LED / flash API integration

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Message-id: <1395327070-20215-1-git-send-email-j.anaszewski@samsung.com>
Date:	Thu, 20 Mar 2014 15:51:02 +0100
From:	Jacek Anaszewski <j.anaszewski@...sung.com>
To:	linux-media@...r.kernel.org, linux-leds@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	s.nawrocki@...sung.com, a.hajda@...sung.com,
	kyungmin.park@...sung.com,
	Jacek Anaszewski <j.anaszewski@...sung.com>
Subject: [PATCH/RFC 0/8] LED / flash API integration

This patch series is 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 20140319.

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 following sysfs attributes:
            - flash_mode
            - flash_timeout
            - max_flash_timeout
            - flash_fault
            - hw_triggered
        * added following public API functions:
            - led_set_flash_mode
            - led_set_flash_timeout
            - led_get_flash_fault
            - led_set_hw_triggered
            - led_sysfs_lock
            - led_sysfs_unlock
            - led_sysfs_is_locked
            - led_is_flash_mode
        * added led_flash structure containing flash specific
	  ops and flash timeout related data
	* added led_classdev_init_flash function to be called
	  by a led driver
    - Addition of a v4l2_flash 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
  media: Add registration helpers for V4L2 flash sub-devices
  media: exynos4-is: Add support for v4l2-flash subdevs
  leds: Add support for max77693 mfd flash cell
  DT: Add documentation for the mfd Maxim max77693 flash cell
  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                  |   25 +
 drivers/leds/Kconfig                               |    9 +
 drivers/leds/Makefile                              |    1 +
 drivers/leds/led-class.c                           |  222 +++++-
 drivers/leds/led-core.c                            |  141 +++-
 drivers/leds/led-triggers.c                        |   17 +-
 drivers/leds/leds-max77693.c                       |  768 ++++++++++++++++++++
 drivers/leds/leds.h                                |    9 +
 drivers/media/platform/exynos4-is/media-dev.c      |   34 +-
 drivers/media/platform/exynos4-is/media-dev.h      |   14 +-
 drivers/media/v4l2-core/Makefile                   |    2 +-
 drivers/media/v4l2-core/v4l2-flash.c               |  320 ++++++++
 drivers/mfd/max77693.c                             |   21 +-
 include/linux/leds.h                               |  146 ++++
 include/linux/mfd/max77693.h                       |   32 +
 include/media/v4l2-flash.h                         |  102 +++
 18 files changed, 1879 insertions(+), 34 deletions(-)
 create mode 100644 drivers/leds/leds-max77693.c
 create mode 100644 drivers/media/v4l2-core/v4l2-flash.c
 create mode 100644 include/media/v4l2-flash.h

-- 
1.7.9.5

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