From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean-Jacques Hiblot Subject: [PATCH 0/4] Add a generic driver for LED-based backlight Date: Mon, 1 Jul 2019 17:14:19 +0200 Message-ID: <20190701151423.30768-1-jjhiblot@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: linux-leds@vger.kernel.org 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