| # Copyright (c) 2018, Workaround GmbH |
| # Copyright (c) 2024 STMicroelectronics |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| description: STM32 RTC |
| |
| compatible: "st,stm32-rtc" |
| |
| include: |
| - rtc.yaml |
| - rtc-device.yaml |
| |
| properties: |
| reg: |
| required: true |
| |
| sync-prescaler: |
| type: int |
| description: | |
| RTC synchronous prescaler value. Optional, if not set defaulted in code to: |
| - Selected to give 1 Hz tick rate, based on source clock frequency and asynchronous |
| prescaler value. |
| |
| async-prescaler: |
| type: int |
| description: | |
| RTC asynchronous prescaler value. Optional, if not set defaulted in code to: |
| - 0x7F if RTC source clock is LSE/LSI |
| - 1 if using counter with CONFIG_COUNTER_RTC_STM32_SUBSECONDS option |
| - 0x7C if RTC source clock is HSE |
| |
| hse-prescaler: |
| type: int |
| description: | |
| RTC HSE prescaler value. Applies only when RTC source clock is HSE. |
| Optional, defaulting to the value calculated based on HSE clock frequency |
| to give the highest possibly prescaled source frequency below 1MHz. |
| |
| calib-out-freq: |
| type: int |
| description: | |
| Calibration output frequency (1 Hz or 512 Hz). |
| enum: |
| - 1 |
| - 512 |
| |
| alarms-count: |
| description: | |
| Number of alarms supported by STM32 RTC device. |
| Most of STM32 MCU series have 2 RTC alarms, A & B. |
| Defaults to 0 when not declared in devicetree. |
| |
| alrm-exti-line: |
| type: int |
| description: | |
| Number of the Extended Interrupts and Event Controller (EXTI) interrupt |
| line connected to the RTC Alarm event. |
| Not required, since RTC Alarm interrupt could be routed directly to Nested |
| Vectored Interrupt Controller (NVIC) and to Power Control (PWR) wake-up |
| pins on some series. |
| Valid range: 0 - 31 |
