Add support for Xilinx RTC controller #96720
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zephyrbot
added
area: Boards/SoCs
area: RTC
zephyrbot
requested review from
bjarki-andreasen,
henrikbrixandersen,
ibirnbaum and
michalsimek
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Please fix that reported issue above. |
Add device tree binding for Xilinx RTC controller. The RTC ensures accurate timekeeping using either auxiliary (VCCAUX_PMC) or battery (VCC_BATT) power. It includes calibration logic to adjust for temperature and voltage variations, supporting long-term accuracy. The RTC generates periodic second tick and alarm interrupts for use by system processors. It features a 32-bit seconds counter (supports up to 136 years), a 16-bit tick counter and a 4-bit fractional counter for fine-grained calibration. Signed-off-by: Balanakakamal V <[email protected]> Signed-off-by: Harini T <[email protected]>
Add driver support for Xilinx RTC controller. The supported features include: - Set and get time using Zephyr time conversion functions. - Configuring and handling alarms using interrupt-based callbacks. - Querying and updating alarm time and supported alarm fields. - Detecting alarm triggers and monitoring pending alarm status. - RTC calibration using coarse and fine offset adjustments. Alarm and calibration features are conditionally compiled using the CONFIG_RTC_ALARM and CONFIG_RTC_CALIBRATION options. Signed-off-by: Balanakakamal V <[email protected]> Signed-off-by: Harini T <[email protected]>
Add rtc0 node to zynqmp.dtsi to enable RTC support. Introduce alarms-count parameter to support alarm test cases. This parameter is added to the Device Tree so test cases can read its value and use it during testing. The IP supports only a single alarm count. Signed-off-by: Balanakakamal V <[email protected]> Signed-off-by: Harini T <[email protected]>
Add support for RTC in kv260_r5. Update kv260_r5_defconfig to enable RTC alarm and calibration support in the rtc_api test. Signed-off-by: Balanakakamal V <[email protected]> Signed-off-by: Harini T <[email protected]>
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bjarki-andreasen
requested changes
Oct 7, 2025
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Counters, even low power ones, use the counter API. RTCs are not counters, they store time in broken down time. Instead, implement a counter driver for the counter, and a user may choose to use this wrapper https://github.com/zephyrproject-rtos/zephyr/blob/main/drivers/rtc/rtc_counter.c to expose it as an RTC device
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This series does the following