dts/bindings/display/istech,ist3931.yaml

# Copyright (c) 2024 XuYang Shen  <shenxuyang@shlinyuantech.com>
# SPDX-License-Identifier: Apache-2.0

description: IST3931 65x132 display controller

compatible: "istech,ist3931"

include: [i2c-device.yaml, display-controller.yaml]

properties:
  reset-gpios:
    type: phandle-array
    required: true
    description: |
      RESET pin.

      The RESET pin of IST3931 is active low.
      If connected directly the MCU pin should be configured
      as active low.

  x-offset:
    type: int
    required: true
    description: The column offset in pixels of the LCD to the controller memory

  y-offset:
    type: int
    required: true
    description: The row offset in pixels of the LCD to the controller memory

  voltage-converter:
    type: boolean
    description: Internal voltage converter circuits will be enabled if true

  voltage-follower:
    type: boolean
    description: Internal voltage follower circuits will be enabled if true

  lcd-bias:
    type: int
    required: true
    description: LCD bias ratio of the voltage required for driving the LCD

  lcd-ct:
    type: int
    required: true
    description: reference voltage V0= [0.7+CT*0.005]/Bias at 24 degree Celsius

  duty-ratio:
    type: int
    required: true
    description: Com_1~COM_N is select, N=Duty-ratio.

  frame-control:
    type: int
    required: true
    description: Frame-control of row frequency and frame frequency.
      Row frequency = 3X10^6/ Frame-control
      Frame frequency = Row frequency / Duty-ratio

  reverse-com-output:
    type: boolean
    description: Common Output Mode Select, the output mode will be COM_1->COM_N if set to 0

  reverse-seg-driver:
    type: boolean
    description:
      Defines the relationship between RAM column address and segment driver.
      the mapping will be SEG1->SEG132 if set to 0

  e-force-on:
    type: boolean
    description: turn on whole LCD points regardless of display RAM

  reverse-ram-lcd:
    type: boolean
    description: Reverse the lit and unlit display relation between RAM bit data and LCD cell