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
next 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
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