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dt-bindings: auxdisplay: Add bindings for generic 7-segment LED
Add bindings for a generic 7-segment LED display using GPIOs. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/auxdisplay/gpio-7-segment.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: GPIO based LED segment display
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maintainers:
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- Chris Packham <chris.packham@alliedtelesis.co.nz>
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properties:
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compatible:
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const: gpio-7-segment
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segment-gpios:
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description: |
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An array of GPIOs one per segment. The first GPIO corresponds to the A
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segment, the seventh GPIO corresponds to the G segment. Some LED blocks
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also have a decimal point which can be specified as an optional eighth
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segment.
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-a-
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f b
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-g-
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e c
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-d- dp
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minItems: 7
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maxItems: 8
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required:
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- segment-gpios
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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led-7seg {
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compatible = "gpio-7-segment";
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segment-gpios = <&gpio 0 GPIO_ACTIVE_LOW>,
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<&gpio 1 GPIO_ACTIVE_LOW>,
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<&gpio 2 GPIO_ACTIVE_LOW>,
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<&gpio 3 GPIO_ACTIVE_LOW>,
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<&gpio 4 GPIO_ACTIVE_LOW>,
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<&gpio 5 GPIO_ACTIVE_LOW>,
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<&gpio 6 GPIO_ACTIVE_LOW>;
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};
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