36 lines
1.1 KiB
YAML
36 lines
1.1 KiB
YAML
# Copyright (c) 2019, Linaro Limited
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# Copyright (c) 2019, Nordic Semiconductor ASA
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#
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# SPDX-License-Identifier: Apache-2.0
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description: |
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Worldsemi WS2812 (and compatible) LED controller
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Driver bindings for daisy chains of WS2812 (and compatible devices
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like SK6812) LED controllers.
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The PWM protocol is described here:
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https://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
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A 0 bit's pulse width is between 200 and 500 ns. A 1 bit's is
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at least 550 ns, with 700 ns or so typical. Pixel order is GRB.
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You can connect the device to either a GPIO on your SoC, or a SPI
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MOSI line. Use the worldsemi,ws2812-spi.yaml or
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worldsemi,ws2812-gpio.yaml bindings instead of this file after
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making your choice.
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properties:
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chain-length:
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type: int
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required: true
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description: |
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The number of devices in the daisy-chain.
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has-white-channel:
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type: boolean
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description: |
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If true, the device has a white channel. This is not supported
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by the led_strip.h API, so the white data on the wire will be
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zero if set.
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