5af226400d
RTC alarm is not supported by the driver for now due to the complexity it would take to work around an hardware erratum. However, it is not possible to prevent CONFIG_RTC_ALARM from being enabled at Kconfig level. Modify the RTC driver such that enabling CONFIG_RTC_ALARM on STM32WB0 series does not cause build errors anymore. Signed-off-by: Mathieu Choplain <mathieu.choplain@st.com>
66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/*
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* Copyright (c) 2024 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_RTC_RTC_LL_STM32_H_
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#define ZEPHYR_DRIVERS_RTC_RTC_LL_STM32_H_
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/**
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* ES0584 / ES0631 §2.5.2; ES0632 §2.6.2 (both Rev. 2)
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* """
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* RTC interrupts cannot be reliably used for real-time
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* control functions, since some occurences of RTC
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* interrupts may be missed.
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* """
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* Since alarm IRQs are unreliable, don't allow RTC alarm
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* to be used on STM32WB0 series. For this, we have to
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* create a #define only valid when both the Kconfig is
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* enabled, and we're on a supported series. This must
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* be done because the RTC driver has to build properly
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* on all targets regardless of which Kconfig options have
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* been enabled.
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*/
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#if defined(CONFIG_RTC_ALARM) && !defined(CONFIG_SOC_SERIES_STM32WB0X)
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#define STM32_RTC_ALARM_ENABLED 1
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/* STM32 RTC alarms, A & B, LL masks are equal */
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#define RTC_STM32_ALRM_MASK_ALL LL_RTC_ALMA_MASK_ALL
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#define RTC_STM32_ALRM_MASK_SECONDS LL_RTC_ALMA_MASK_SECONDS
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#define RTC_STM32_ALRM_MASK_MINUTES LL_RTC_ALMA_MASK_MINUTES
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#define RTC_STM32_ALRM_MASK_HOURS LL_RTC_ALMA_MASK_HOURS
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#define RTC_STM32_ALRM_MASK_DATEWEEKDAY LL_RTC_ALMA_MASK_DATEWEEKDAY
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#define RTC_STM32_ALRM_DATEWEEKDAYSEL_WEEKDAY LL_RTC_ALMA_DATEWEEKDAYSEL_WEEKDAY
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#define RTC_STM32_ALRM_DATEWEEKDAYSEL_DATE LL_RTC_ALMA_DATEWEEKDAYSEL_DATE
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static inline void ll_func_exti_enable_rtc_alarm_it(uint32_t exti_line)
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{
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#if defined(CONFIG_SOC_SERIES_STM32H7X) && defined(CONFIG_CPU_CORTEX_M4)
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LL_C2_EXTI_EnableIT_0_31(exti_line);
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LL_EXTI_EnableRisingTrig_0_31(exti_line);
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#elif defined(CONFIG_SOC_SERIES_STM32U5X) || defined(CONFIG_SOC_SERIES_STM32WBAX)
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/* in STM32U5 & STM32WBAX series, RTC Alarm event is not routed to EXTI */
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#else
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LL_EXTI_EnableIT_0_31(exti_line);
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LL_EXTI_EnableRisingTrig_0_31(exti_line);
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#endif /* CONFIG_SOC_SERIES_STM32H7X and CONFIG_CPU_CORTEX_M4 */
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}
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static inline void ll_func_exti_clear_rtc_alarm_flag(uint32_t exti_line)
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{
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#if defined(CONFIG_SOC_SERIES_STM32H7X) && defined(CONFIG_CPU_CORTEX_M4)
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LL_C2_EXTI_ClearFlag_0_31(exti_line);
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#elif defined(CONFIG_SOC_SERIES_STM32U5X) || defined(CONFIG_SOC_SERIES_STM32WBAX)
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/* in STM32U5 & STM32WBAX series, RTC Alarm event is not routed to EXTI */
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#elif DT_HAS_COMPAT_STATUS_OKAY(st_stm32g0_exti)
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LL_EXTI_ClearRisingFlag_0_31(exti_line);
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#else
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LL_EXTI_ClearFlag_0_31(exti_line);
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#endif /* CONFIG_SOC_SERIES_STM32H7X and CONFIG_CPU_CORTEX_M4 */
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}
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#endif /* CONFIG_RTC_ALARM && !CONFIG_SOC_SERIES_STM32WB0X */
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#endif /* ZEPHYR_DRIVERS_RTC_RTC_LL_STM32_H_ */
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