[Action/Cherry pick][202505]rtc: armada38x: disable update interrupt …#597
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fountzou wants to merge 1 commit into
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[Action/Cherry pick][202505]rtc: armada38x: disable update interrupt …#597fountzou wants to merge 1 commit into
fountzou wants to merge 1 commit into
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…feature Signed-off-by: Ioannis Fountzoulas <ioannis.fountzoulas@nokia.com>
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Stop advertising update interrupts for the armada38x RTC driver.
SONiC switched to chrony, which enables RTC update interrupts via the RTC_UIE_ON ioctl. On the armada38x RTC driver, big skew in time can lead to pinning the CPU and triggering the RCU stall and reboot.
We clear the RTC_FEATURE_UPDATE_INTERRUPT at probe time, so RTC_UIE_ON no longer takes the native periodic-timer path and instead routes to the UIE emulation path (dbd69ff).
This is a cherry-pick of #595 for 202505.