| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/pwm/atmel,hlcdc-pwm.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Atmel's HLCDC's PWM controller |
| |
| maintainers: |
| - Nicolas Ferre <nicolas.ferre@microchip.com> |
| - Alexandre Belloni <alexandre.belloni@bootlin.com> |
| - Claudiu Beznea <claudiu.beznea@tuxon.dev> |
| |
| description: |
| The LCDC integrates a Pulse Width Modulation (PWM) Controller. This block |
| generates the LCD contrast control signal (LCD_PWM) that controls the |
| display's contrast by software. LCDC_PWM is an 8-bit PWM signal that can be |
| converted to an analog voltage with a simple passive filter. LCD display |
| panels have different backlight specifications in terms of minimum/maximum |
| values for PWM frequency. If the LCDC PWM frequency range does not match the |
| LCD display panel, it is possible to use the standalone PWM Controller to |
| drive the backlight. |
| |
| properties: |
| compatible: |
| const: atmel,hlcdc-pwm |
| |
| "#pwm-cells": |
| const: 3 |
| |
| required: |
| - compatible |
| - "#pwm-cells" |
| |
| additionalProperties: false |
