From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: linux-rtc@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: Q: use 1s irqs to overcome alarm minute granularity?
Date: Tue, 25 Feb 2025 11:54:49 +0100 [thread overview]
Message-ID: <Z72heU393-y555VT@ninjato> (raw)
In-Reply-To: <2025022510474487653067@mail.local>
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> > It would not only gain us a better resolution for alarms, but also
> > allows for enabling UIE.
>
> This is already something you can do. I admit this has become super
> convoluted since Jon switched UIEs to be handled using the alarm
> interrupt...
How can I enable UIE with alarms which do not support
one-second-resolution? I found that most, if not all, drivers which have
RTC_FEATURE_ALARM_RES_MINUTE or RTC_FEATURE_ALARM_RES_2S set, they all
disable RTC_FEATURE_UPDATE_INTERRUPT. Which makes sense to me when I
look at the UIE-via-alarms code in the RTC core. But, yes, it is
convoluted, so maybe I am missing something?
Thanks for your fast reply!
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prev parent reply other threads:[~2025-02-25 10:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-25 10:19 Q: use 1s irqs to overcome alarm minute granularity? Wolfram Sang
2025-02-25 10:24 ` Biju Das
2025-02-25 10:28 ` Wolfram Sang
2025-02-25 10:47 ` Alexandre Belloni
2025-02-25 10:54 ` Wolfram Sang [this message]
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