| # Copyright (c) 2023, Prevas A/S |
| |
| description: Watchdog driver for external IC (TPS382x) |
| |
| compatible: "ti,tps382x" |
| |
| include: base.yaml |
| |
| properties: |
| wdi-gpios: |
| type: phandle-array |
| required: true |
| description: |
| WDI gpio. If WDI remains high or low longer than the timeout period, |
| then reset is triggered. The reset has a typical delay time of 200 ms for |
| TPS3823/4/8, TPS3823A. The timer clears when reset is asserted or |
| when WDI sees a rising edge or a falling edge. If unused, the WDI |
| connection must be high impedance to prevent it from causing a reset |
| event. |
| |
| timeout-period: |
| type: int |
| default: 1600 |
| description: |
| Time-out period in milliseconds. Typical for TPS3823/4/8 and TPS3823A is |
| 1.6 seconds but minimum is 0.9. To avoid false positive watchdog reset |
| the watchdog should be kicked within the minimum timeout period. The kick |
| interval also needs to compensate for MCU clock tolerances which means it |
| should be kicked with an interval less than 0.9 seconds. If this device |
| is used as fallback for the task watchdog this can be achieved by setting |
| e.g. TASK_WDT_MIN_TIMEOUT to 850 and TASK_WDT_HW_FALLBACK_DELAY to 750. |
