From nobody Fri Dec 19 06:57:11 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A42BC71132 for ; Thu, 17 Aug 2023 22:57:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355964AbjHQW4l (ORCPT ); Thu, 17 Aug 2023 18:56:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355935AbjHQW4F (ORCPT ); Thu, 17 Aug 2023 18:56:05 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E4BB3A86; Thu, 17 Aug 2023 15:55:46 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1bee82fab5aso2700275ad.3; Thu, 17 Aug 2023 15:55:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692312946; x=1692917746; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=oBswWeic/lo4KfdmWov/kNdO9T86copP+2hJMykbXoU=; b=SkFvGImlqWNj7k34nqFQ0h98ZUGV0d/dBxQ/TCfwPQJFUW2xvaBQgORu9wRoxqFTB6 zj4mWDkCrU6t3meRpjTUmUsmnC/sDXkqoFesuLocHt005vmRQzOI40MQjQRN1JC60wZX d4+KusfOGcATN9sZliVHVD9vHGAq6gkSByL/plmCiNElMXC27/BO0p/Rw1eKjQbzkd/l pP6bdRd23JTnGMGW3Bs/M+I5Xr0yMyAKxvSvLJDaH7SS0d9aRy7f+RgAvUmQFMVmVvKi 8ZFBeDdf+8WvG3+1F15iL1eATbVw2c7gi4Ew7+Gy7v0vcqLLv6w4NDH27+RqQ31s07GG SqYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692312946; x=1692917746; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=oBswWeic/lo4KfdmWov/kNdO9T86copP+2hJMykbXoU=; b=axFT9YhWC+w1W3VQyC2GB7EdrUBtRE2UC3L6++ql16Ye6Y5HChH5zTJCIzmQdhN+fu Np1CX+TazP4L2mpQlJzAVPkxRe3D7XLuiBN3foD3HO+UTxOBwqS5nBEFpgfZONTmp1NP MNIo+Ak23JIwuWZlA68Sss6dGTuqSes+HgNRZjE9TvZBfi38D8Vp1lXYc+qBySEgn/il 3DLJ/tccTbgTes4JuIjuBPkTTFYvRPlPAzatO84gXe5rriojEpIvS5hiUy8YrkR6wj8l 9pHNV6zMGfKKi0M1ay+sfKbqKZpg+nECCsv9dHdw6frUfiaLdTkISCzQRZlroKwhFQOF 3VhQ== X-Gm-Message-State: AOJu0YzE04bf7WgA+FZZFrdywM87N9EmcuNr+JzPMujSDqEcASTS5e14 U5YXvj0Hbi/r0MD8caJ2FSE= X-Google-Smtp-Source: AGHT+IH/z7EPJYgQZK9t5l7bkg+hRtsW1dDieYTbI0lqpjOZ7BlFEpRYNW6bHMH6bWrXqay6elvAPQ== X-Received: by 2002:a17:902:b783:b0:1b8:8dbd:e1a0 with SMTP id e3-20020a170902b78300b001b88dbde1a0mr807488pls.13.1692312945903; Thu, 17 Aug 2023 15:55:45 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id iz22-20020a170902ef9600b001b9da42cd7dsm282552plb.279.2023.08.17.15.55.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 15:55:45 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: Alexandre Belloni Cc: Alessandro Zummo , Benson Leung , Miquel Raynal , Thomas Gleixner , John Stultz , Stephen Boyd , linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org, Brian Norris , Guenter Roeck Subject: [PATCH v2 4/7] rtc: cmos: Report supported alarm limit to rtc infrastructure Date: Thu, 17 Aug 2023 15:55:34 -0700 Message-Id: <20230817225537.4053865-5-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230817225537.4053865-1-linux@roeck-us.net> References: <20230817225537.4053865-1-linux@roeck-us.net> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The alarm window supported by the cmos RTC depends on the chip and its configuration. Report the limit to the RTC core. Cc: Brian Norris Signed-off-by: Guenter Roeck --- v2: Rename range_max_offset -> alarm_offset_max drivers/rtc/rtc-cmos.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index c9416fe8542d..228fb2d11c70 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -913,6 +913,10 @@ static inline void cmos_check_acpi_rtc_status(struct d= evice *dev, #define INITSECTION __init #endif =20 +#define SECS_PER_DAY (24 * 60 * 60) +#define SECS_PER_MONTH (28 * SECS_PER_DAY) +#define SECS_PER_YEAR (365 * SECS_PER_DAY) + static int INITSECTION cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) { @@ -1019,6 +1023,13 @@ cmos_do_probe(struct device *dev, struct resource *p= orts, int rtc_irq) goto cleanup0; } =20 + if (cmos_rtc.mon_alrm) + cmos_rtc.rtc->alarm_offset_max =3D SECS_PER_YEAR - 1; + else if (cmos_rtc.day_alrm) + cmos_rtc.rtc->alarm_offset_max =3D SECS_PER_MONTH - 1; + else + cmos_rtc.rtc->alarm_offset_max =3D SECS_PER_DAY - 1; + rename_region(ports, dev_name(&cmos_rtc.rtc->dev)); =20 if (!mc146818_does_rtc_work()) { --=20 2.39.2