104 lines
2.8 KiB
YAML
104 lines
2.8 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/display/atmel,lcdc-display.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Microchip's LCDC Display
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maintainers:
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- Nicolas Ferre <nicolas.ferre@microchip.com>
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- Dharma Balasubiramani <dharma.b@microchip.com>
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description:
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The LCD Controller (LCDC) consists of logic for transferring LCD image data
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from an external display buffer to a TFT LCD panel. The LCDC has one display
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input buffer per layer that fetches pixels through the single bus host
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interface and a look-up table to allow palletized display configurations. The
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LCDC is programmable on a per layer basis, and supports different LCD
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resolutions, window sizes, image formats and pixel depths.
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# We need a select here since this schema is applicable only for nodes with the
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# following properties
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select:
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anyOf:
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- required: [ 'atmel,dmacon' ]
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- required: [ 'atmel,lcdcon2' ]
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- required: [ 'atmel,guard-time' ]
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properties:
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atmel,dmacon:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: dma controller configuration
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atmel,lcdcon2:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: lcd controller configuration
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atmel,guard-time:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: lcd guard time (Delay in frame periods)
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maximum: 127
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bits-per-pixel:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: lcd panel bit-depth.
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enum: [1, 2, 4, 8, 16, 24, 32]
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atmel,lcdcon-backlight:
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$ref: /schemas/types.yaml#/definitions/flag
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description: enable backlight
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atmel,lcdcon-backlight-inverted:
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$ref: /schemas/types.yaml#/definitions/flag
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description: invert backlight PWM polarity
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atmel,lcd-wiring-mode:
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$ref: /schemas/types.yaml#/definitions/string
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description: lcd wiring mode "RGB" or "BRG"
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enum:
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- RGB
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- BRG
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atmel,power-control-gpio:
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description: gpio to power on or off the LCD (as many as needed)
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maxItems: 1
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display-timings:
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$ref: panel/display-timings.yaml#
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required:
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- atmel,dmacon
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- atmel,lcdcon2
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- atmel,guard-time
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- bits-per-pixel
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additionalProperties: false
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examples:
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- |
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display: panel {
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bits-per-pixel = <32>;
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atmel,lcdcon-backlight;
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atmel,dmacon = <0x1>;
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atmel,lcdcon2 = <0x80008002>;
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atmel,guard-time = <9>;
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atmel,lcd-wiring-mode = "RGB";
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display-timings {
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native-mode = <&timing0>;
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timing0: timing0 {
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clock-frequency = <9000000>;
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hactive = <480>;
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vactive = <272>;
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hback-porch = <1>;
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hfront-porch = <1>;
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vback-porch = <40>;
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vfront-porch = <1>;
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hsync-len = <45>;
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vsync-len = <1>;
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};
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};
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};
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