[PATCH 0/4] Add a generic driver for LED-based backlight

Jean-Jacques Hiblot
2019-07-01T15:15:27Z

This series aims to add a led-backlight driver, similar to pwm-backlight,
but using a LED class device underneath.

A few years ago (2015), Tomi Valkeinen posted a series implementing a
backlight driver on top of a LED device:
https://patchwork.kernel.org/patch/7293991/
https://patchwork.kernel.org/patch/7294001/
https://patchwork.kernel.org/patch/7293981/

The discussion stopped because Tomi lacked the time to work on it.

This series takes it from there and implements the binding that was
discussed in https://patchwork.kernel.org/patch/7293991/. In this new
binding the backlight device is a child of the LED controller instead of
being another platform device that uses a phandle to reference a LED.

Jean-Jacques Hiblot (2):
leds: of: create a child device if the LED node contains a
"compatible" string
devicetree: Update led binding

Tomi Valkeinen (2):
backlight: add led-backlight driver
devicetree: Add led-backlight binding

.../devicetree/bindings/leds/common.txt | 3 +
.../video/backlight/led-backlight.txt | 39 ++++
drivers/leds/led-class.c | 16 ++
drivers/video/backlight/Kconfig | 7 +
drivers/video/backlight/Makefile | 1 +
drivers/video/backlight/led_bl.c | 217 ++++++++++++++++++
include/linux/leds.h | 11 +
7 files changed, 294 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/backlight/led-backlight.txt
create mode 100644 drivers/video/backlight/led_bl.c

--
2.17.1