linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Jean-Jacques Hiblot <jjhiblot@ti.com>
To: <jacek.anaszewski@gmail.com>, <pavel@ucw.cz>,
	<robh+dt@kernel.org>, <mark.rutland@arm.com>,
	<lee.jones@linaro.org>, <daniel.thompson@linaro.org>,
	<jingoohan1@gmail.com>
Cc: <dmurphy@ti.com>, <linux-leds@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
	<tomi.valkeinen@ti.com>, Jean-Jacques Hiblot <jjhiblot@ti.com>
Subject: [PATCH v4 0/4] Add a generic driver for LED-based backlight
Date: Wed, 17 Jul 2019 16:15:10 +0200	[thread overview]
Message-ID: <20190717141514.21171-1-jjhiblot@ti.com> (raw)

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.

changes in v4:
- fix dev_err() messages and commit logs following the advices of Pavel
- cosmetic changes (indents, getting rid of  "? 1 : 0" in
  led_match_led_node())

changes in v3:
- dt binding: don't limit the brightness range to 0-255. Use the range of
  the underlying LEDs. as a side-effect, all LEDs must now have the same
  range
- driver: Adapt to dt binding update.
- driver: rework probe() for clarity and remove the remaining goto.

changes in v2:
- handle more than one LED.
- don't make the backlight device a child of the LED controller.
- make brightness-levels and default-brightness-level optional
- removed the option to use a GPIO enable.
- removed the option to use a regulator. It should be handled by the LED
  core
- don't make any change to the LED core (not needed anymore)

Jean-Jacques Hiblot (2):
  leds: Add managed API to get a LED from a device driver
  dt-bindings: backlight: Add led-backlight binding

Tomi Valkeinen (2):
  leds: Add of_led_get() and led_put()
  backlight: add led-backlight driver

 .../bindings/leds/backlight/led-backlight.txt |  28 ++
 drivers/leds/led-class.c                      |  92 ++++++
 drivers/video/backlight/Kconfig               |   7 +
 drivers/video/backlight/Makefile              |   1 +
 drivers/video/backlight/led_bl.c              | 268 ++++++++++++++++++
 include/linux/leds.h                          |   6 +
 6 files changed, 402 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/backlight/led-backlight.txt
 create mode 100644 drivers/video/backlight/led_bl.c

-- 
2.17.1


             reply	other threads:[~2019-07-17 14:15 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-17 14:15 Jean-Jacques Hiblot [this message]
2019-07-17 14:15 ` [PATCH v4 1/4] leds: Add of_led_get() and led_put() Jean-Jacques Hiblot
2019-07-30 11:02   ` Pavel Machek
2019-07-17 14:15 ` [PATCH v4 2/4] leds: Add managed API to get a LED from a device driver Jean-Jacques Hiblot
2019-07-31 13:23   ` Tomi Valkeinen
2019-07-17 14:15 ` [PATCH v4 3/4] dt-bindings: backlight: Add led-backlight binding Jean-Jacques Hiblot
2019-07-18 12:30   ` Jacek Anaszewski
2019-07-17 14:15 ` [PATCH v4 4/4] backlight: add led-backlight driver Jean-Jacques Hiblot
2019-09-09  9:53   ` Daniel Thompson
2019-07-18 13:19 ` [PATCH v4 0/4] Add a generic driver for LED-based backlight Jacek Anaszewski
2019-07-22  7:06   ` Lee Jones
2019-07-22 21:23     ` Jacek Anaszewski
2019-09-08 16:17       ` Jacek Anaszewski
2019-09-09 11:12         ` Daniel Thompson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190717141514.21171-1-jjhiblot@ti.com \
    --to=jjhiblot@ti.com \
    --cc=daniel.thompson@linaro.org \
    --cc=dmurphy@ti.com \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=jacek.anaszewski@gmail.com \
    --cc=jingoohan1@gmail.com \
    --cc=lee.jones@linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-leds@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=pavel@ucw.cz \
    --cc=robh+dt@kernel.org \
    --cc=tomi.valkeinen@ti.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).