49 lines
1.3 KiB
YAML
49 lines
1.3 KiB
YAML
# Copyright (c) 2018, Linaro Limited
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# SPDX-License-Identifier: Apache-2.0
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description: |
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This allows you to define a group of LEDs. Each LED in the group is
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controlled by a GPIO. Each LED is defined in a child node of the
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gpio-leds node.
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Here is an example which defines three LEDs in the node /leds:
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/ {
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leds {
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compatible = "gpio-leds";
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led_0 {
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gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
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};
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led_1 {
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gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;
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};
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led_2 {
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gpios = <&gpio1 15 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
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};
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};
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};
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Above:
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- led_0 is pin 1 on gpio0. The LED is on when the pin is low,
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and off when the pin is high.
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- led_1 is pin 2 on gpio0. The LED is on when the pin is high,
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and off when it is low.
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- led_2 is pin 15 on gpio1. The LED is on when the pin is low,
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and the pin's internal pull-up resistor should be enabled.
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compatible: "gpio-leds"
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child-binding:
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description: GPIO LED child node
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properties:
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gpios:
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type: phandle-array
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required: true
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label:
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type: string
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description: |
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Human readable string describing the LED. It can be used by an
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application to identify this LED or to retrieve its number/index
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(i.e. child node number) on the parent device.
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