From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Biju Das <biju.das.jz@bp.renesas.com>
Cc: "linux-rtc@vger.kernel.org" <linux-rtc@vger.kernel.org>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
"linux-renesas-soc@vger.kernel.org"
<linux-renesas-soc@vger.kernel.org>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Subject: Re: Q: use 1s irqs to overcome alarm minute granularity?
Date: Tue, 25 Feb 2025 11:28:34 +0100 [thread overview]
Message-ID: <Z72bUunh0EIjDwBK@ninjato> (raw)
In-Reply-To: <TY3PR01MB1134666224CC60F280EC9422386C32@TY3PR01MB11346.jpnprd01.prod.outlook.com>
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On Tue, Feb 25, 2025 at 10:24:32AM +0000, Biju Das wrote:
> + Claudiu, Looks RZ/G3S RTC can handle it.
> ●
> Periodic interrupt (PRD)
> ? 2 seconds, 1 second, 1/2 second, 1/4 second, 1/8 second, 1/16 second, 1/32
This driver does not have that problem, because the alarms support
seconds right away:
408 writeb(RTCA3_AR_ENB | bin2bcd(tm->tm_sec), priv->base + RTCA3_RSECAR);
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next prev parent reply other threads:[~2025-02-25 10:28 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 [this message]
2025-02-25 10:47 ` Alexandre Belloni
2025-02-25 10:54 ` Wolfram Sang
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