From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Masney Subject: [PATCH v2 2/3] dt-bindings: backlight: add lm3630a bindings Date: Mon, 1 Apr 2019 06:30:33 -0400 Message-ID: <20190401103034.21062-3-masneyb@onstation.org> References: <20190401103034.21062-1-masneyb@onstation.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190401103034.21062-1-masneyb@onstation.org> Sender: linux-kernel-owner@vger.kernel.org To: lee.jones@linaro.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, robh+dt@kernel.org Cc: jacek.anaszewski@gmail.com, pavel@ucw.cz, mark.rutland@arm.com, b.zolnierkie@samsung.com, dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, dmurphy@ti.com, jonathan@marek.ca List-Id: devicetree@vger.kernel.org Add new backlight bindings for the TI LM3630A dual-string white LED. Signed-off-by: Brian Masney --- .../leds/backlight/lm3630a-backlight.yaml | 112 ++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml new file mode 100644 index 000000000000..42a8c59d237a --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml @@ -0,0 +1,112 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI LM3630A High-Efficiency Dual-String White LED + +maintainers: + - Lee Jones + - Daniel Thompson + - Jingoo Han + +description: | + The LM3630A is a current-mode boost converter which supplies the power and + controls the current in up to two strings of 10 LEDs per string. + https://www.ti.com/product/LM3630A + +properties: + compatible: + const: ti,lm3630a + + reg: + maxItems: 1 + + ti,linear-mapping-mode: + description: | + Enable linear mapping mode. If disabled, then it will use exponential + mapping mode in which the ramp up/down appears to have a more uniform + tranisiton to the human eye. + type: boolean + +required: + - compatible + - reg + +patternProperties: + "^led*$": + type: object + description: | + Properties for a string of connected LEDs. + + properties: + label: + description: | + The label for this LED. If omitted, the label is taken from the node + name (excluding the unit address). It has to uniquely identify a + device, i.e. no other LED class device can be assigned the same label. + + led-sources: + description: | + List of device current outputs the LED is connected to. + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - minItems: 1 + maxItems: 2 + items: + minimum: 0 + maximum: 1 + + default-brightness: + description: Default brightness level on boot. + minimum: 0 + maximum: 255 + + max-brightness: + description: Maximum brightness level on boot. + minimum: 0 + maximum: 255 + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + lm3630a_bl@38 { + compatible = "ti,lm3630a"; + status = "ok"; + reg = <0x38>; + + led { + label = "main-lcd"; + led-sources = <0 1>; + default-brightness = <200>; + max-brightness = <255>; + }; + }; + }; + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + lm3630a_bl@38 { + compatible = "ti,lm3630a"; + status = "ok"; + reg = <0x38>; + + led-bank-a { + led-sources = <0>; + default-brightness = <150>; + ti,linear-mapping-mode; + }; + + led-bank-b { + led-sources = <1>; + default-brightness = <225>; + ti,linear-mapping-mode; + }; + }; + }; -- 2.20.1