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