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[Action/Cherry pick][202605]rtc: armada38x: disable update interrupt - #600

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yejianquan merged 1 commit into
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Jul 30, 2026
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[Action/Cherry pick][202605]rtc: armada38x: disable update interrupt#600
yejianquan merged 1 commit into
sonic-net:202605from
fountzou:rtc-202605

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@fountzou

@fountzou fountzou commented Jul 9, 2026

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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 202605.

Signed-off-by: Ioannis Fountzoulas <ioannis.fountzoulas@nokia.com>
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fountzou requested a review from a team as a code owner July 9, 2026 09:49
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/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

@fountzou

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Hi @yejianquan,
OC test results uploaded to kusto: d8fdcad8-c7f8-41a4-be77-1ac38fb8a6e0

Unfortunately, I don't have the permissions required to add labels. Could you please help by adding the "Tested for 202605" label?

--Thank you

@yejianquan
yejianquan merged commit 9b183be into sonic-net:202605 Jul 30, 2026
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4 participants