| # Copyright (c) 2022 Andreas Sandberg |
| # Copyright (c) 2020, Phytec Messtechnik GmbH |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| description: UltraChip UC81xx EPD display controller common properties |
| |
| include: [spi-device.yaml, display-controller.yaml] |
| |
| properties: |
| reset-gpios: |
| type: phandle-array |
| required: true |
| description: RESET pin. |
| |
| The RESET pin of UC81xx is active low. |
| If connected directly the MCU pin should be configured |
| as active low. |
| |
| dc-gpios: |
| type: phandle-array |
| required: true |
| description: DC pin. |
| |
| The DC pin of UC81xx is active low (transmission command byte). |
| If connected directly the MCU pin should be configured |
| as active low. |
| |
| busy-gpios: |
| type: phandle-array |
| required: true |
| description: BUSY pin. |
| |
| The BUSY pin of UC81xx is active low. |
| If connected directly the MCU pin should be configured |
| as active low. |
| |
| softstart: |
| type: uint8-array |
| description: Booster Soft Start (BTST) values |
| |
| child-binding: |
| description: | |
| Child nodes describe refresh profiles. Each refresh profile |
| specifies a set of voltages used to drive the refresh |
| cycle. Refresh nodes are optional and are used to override |
| defaults loaded from the controllers OTP memory. |
| |
| The partial refresh profile is used when performing a partial |
| refresh (writes while blanking is off). Since the controller |
| always supports partial updates, the driver uses the full refresh |
| profile and scans the partial window corresponding to the write if |
| no partial profile has been provided. An empty profile can be used |
| to use the reset values from OTP instead of the values specified |
| in the full profile. |
| |
| The driver typically looks for the following child nodes: |
| |
| - 'full' - Normal / full refresh. |
| - 'partial' - Partial refresh, defaults to the values in the |
| full profile if not present. |
| |
| properties: |
| pwr: |
| type: uint8-array |
| description: Power Setting (PWR) values |
| |
| cdi: |
| type: int |
| description: | |
| VCOM and data interval value. This value is optional but must |
| be provided to enable border refresh control. |
| |
| tcon: |
| type: int |
| description: TCON setting value |
| |
| pll: |
| type: int |
| description: PLL / frame rate control |
| |
| vdcs: |
| type: int |
| description: VCOM DC settings |
| |
| lutc: |
| type: uint8-array |
| description: VCOM LUT |
| |
| lutww: |
| type: uint8-array |
| description: White-to-white LUT |
| |
| lutkw: |
| type: uint8-array |
| description: Black-to-white LUT |
| |
| lutwk: |
| type: uint8-array |
| description: White-to-black LUT |
| |
| lutkk: |
| type: uint8-array |
| description: White-to-black LUT |
| |
| lutbd: |
| type: uint8-array |
| description: Border LUT |
