* [PATCH] rtc: amlogic-a4: clear unsupported update interrupt feature
@ 2026-06-24 7:24 Xianwei Zhao via B4 Relay
0 siblings, 0 replies; only message in thread
From: Xianwei Zhao via B4 Relay @ 2026-06-24 7:24 UTC (permalink / raw)
To: Yiting Deng, Alexandre Belloni
Cc: linux-amlogic, linux-rtc, linux-kernel, Xianwei Zhao
From: Xianwei Zhao <xianwei.zhao@amlogic.com>
The Amlogic A4 RTC does not support update interrupt. Clear
RTC_FEATURE_UPDATE_INTERRUPT before registering the RTC device to
prevent userspace from enabling an unsupported RTC UIE function.
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
Clear RTC_FEATURE_UPDATE_INTERRUPT before registering the RTC device.
---
drivers/rtc/rtc-amlogic-a4.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/rtc/rtc-amlogic-a4.c b/drivers/rtc/rtc-amlogic-a4.c
index 50938c35af36..116cf095a9e9 100644
--- a/drivers/rtc/rtc-amlogic-a4.c
+++ b/drivers/rtc/rtc-amlogic-a4.c
@@ -379,6 +379,7 @@ static int aml_rtc_probe(struct platform_device *pdev)
rtc->rtc_dev->ops = &aml_rtc_ops;
rtc->rtc_dev->range_min = 0;
rtc->rtc_dev->range_max = U32_MAX;
+ clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, rtc->rtc_dev->features);
return devm_rtc_register_device(rtc->rtc_dev);
}
---
base-commit: 851d961ff248218f681c53cf0f7f08cf8201a117
change-id: 20260624-rtc-feature-03ce3f3843a9
Best regards,
--
Xianwei Zhao <xianwei.zhao@amlogic.com>
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