From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean-Jacques Hiblot Subject: [PATCH 4/4] devicetree: Add led-backlight binding Date: Mon, 1 Jul 2019 17:14:23 +0200 Message-ID: <20190701151423.30768-5-jjhiblot@ti.com> References: <20190701151423.30768-1-jjhiblot@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20190701151423.30768-1-jjhiblot@ti.com> 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 , devicetree@vger.kernel.org List-Id: linux-leds@vger.kernel.org From: Tomi Valkeinen Add DT binding for led-backlight. Signed-off-by: Tomi Valkeinen Signed-off-by: Jean-Jacques Hiblot Cc: devicetree@vger.kernel.org --- .../video/backlight/led-backlight.txt | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/backlight/led-backlight.txt diff --git a/Documentation/devicetree/bindings/video/backlight/led-backlight.txt b/Documentation/devicetree/bindings/video/backlight/led-backlight.txt new file mode 100644 index 000000000000..216cd52d624a --- /dev/null +++ b/Documentation/devicetree/bindings/video/backlight/led-backlight.txt @@ -0,0 +1,39 @@ +led-backlight bindings + +The node of the backlight driver IS the node of the LED. + +Required properties: + - compatible: "led-backlight" + - brightness-levels: Array of distinct LED brightness levels. These + are in the range from 0 to 255, passed to the LED class driver. + - default-brightness-level: the default brightness level (index into the + array defined by the "brightness-levels" property) + +Optional properties: + - power-supply: regulator for supply voltage + - enable-gpios: contains a single GPIO specifier for the GPIO which enables + and disables the backlight (see GPIO binding[0]) + +[0]: Documentation/devicetree/bindings/gpio/gpio.txt + +Example: + +led_ctrl { + red_led@1 { + label = "red"; + reg = <1>; + } + + backlight_led@2 { + function = LED_FUNCTION_BACKLIGHT; + reg = <2>; + + compatible = "led-backlight"; + + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness-level = <6>; + + power-supply = <&vdd_bl_reg>; + enable-gpios = <&gpio 58 0>; + }; +}; -- 2.17.1