From: Xianwei Zhao via B4 Relay <devnull+xianwei.zhao.amlogic.com@kernel.org>
To: Yiting Deng <yiting.deng@amlogic.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: linux-amlogic@lists.infradead.org, linux-rtc@vger.kernel.org,
linux-kernel@vger.kernel.org,
Xianwei Zhao <xianwei.zhao@amlogic.com>
Subject: [PATCH] rtc: amlogic-a4: clear unsupported update interrupt feature
Date: Wed, 24 Jun 2026 07:24:34 +0000 [thread overview]
Message-ID: <20260624-rtc-feature-v1-1-42dccd22c0ee@amlogic.com> (raw)
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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reply other threads:[~2026-06-24 7:24 UTC|newest]
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