| # |
| # Copyright (c) 2019 Peter Bigot Consulting, LLC |
| # |
| # SPDX-License-Identifier: Apache-2.0 |
| # |
| |
| description: Maxim DS3231 I2C RTC/TCXO |
| |
| compatible: "maxim,ds3231" |
| |
| include: i2c-device.yaml |
| |
| properties: |
| reg: |
| required: true |
| |
| 32k-gpios: |
| type: phandle-array |
| required: false |
| description: | |
| |
| 32 KiHz open drain output |
| |
| The DS3231 defaults to providing a 32 KiHz square wave on this |
| signal. The driver does not make use of this, but applications |
| may want access. |
| |
| isw-gpios: |
| type: phandle-array |
| required: false |
| description: | |
| |
| interrupt/square wave open drain output |
| |
| The DS3231 uses this signal to notify when an alarm has triggered, |
| and also to produce a square wave aligned to the countdown chain. |
| Both capabilities are used within the driver. This signal must be |
| present to support time set and read operations that preserve |
| sub-second accuracy. |
