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 AA0AAC07E8C for ; Wed, 16 Aug 2023 13:40:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245659AbjHPNkI (ORCPT ); Wed, 16 Aug 2023 09:40:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245609AbjHPNjt (ORCPT ); Wed, 16 Aug 2023 09:39:49 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 459C726A9; Wed, 16 Aug 2023 06:39:48 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id d9443c01a7336-1bdf7086ae5so16019805ad.0; Wed, 16 Aug 2023 06:39:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692193188; x=1692797988; 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=oscugnf7qYaTZOb13U9ax19uPvy15y4ztIfQsoTuemg=; b=C4NKz8S2dkpWNgwFeQmkOLjPwyXB2iURVjCpQ73Sa5SYRQEjIRSFZkXJV17gS6ppfG etzuAmbwu94iRIMEuqQdmVd73tTyXvyqJd7wBVNUoL4It95ok5sKs4YF3iEXC7BnQ1lE 7UmKVCEHWgGebJ16Od3m8lfc1Inl/OFqt8wLn0hDLSUpK8n3ZqsVANSFkesUI7EncayZ 6zw8MDCGSToRyvnVXuadnKjst7LTvrNNZSCX32IiUjOaN++Vb/1WI+vZUyAw9vJMo1dO MaV3mgE4pGTCUxje2bS0xZDNqpQYB5dTAka55kHTzaXTwHUhVFKBfpjCJegRp6/DG4IN 3oYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692193188; x=1692797988; 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=oscugnf7qYaTZOb13U9ax19uPvy15y4ztIfQsoTuemg=; b=ELyaDrVOw2A5kSFsFBR+lKpw4E5k8CHEilru8m/BWuTL+UIbc73maZgnJJiZuotbvw gGHOpU3SsGts1hBiJnKmYIn78cmnw5QRo2PkE+uPoKJ3IOTfJ1CTxH0yjm0wqkxGGLo2 QX9+8aOAjNRhBR3eUqReIxgLhuwZilKY6f7rkAKJVAgOEd0kIgfOzp5SfsboAsGXtpY0 IwIMZGGp0aPD+TSaLpkxNlJ9UmTdNAJi0t9wIvJc+t1MjOltYAzgAv0nACKp8xU34jd/ XlOoFmlF9uz2tPA7Z93U+f5uiOeKICp/51Ee7ogVOVYZDjssZ8ZcPga2uY0YXhQbvp9x DtiQ== X-Gm-Message-State: AOJu0Yy37Bj6l3ySemJSxlhmBjS76kOT+sXFXK4LBpjF2JQbamq3R0lS YB8ynoRXArC5pd4PECQHtv172L/ltCk= X-Google-Smtp-Source: AGHT+IE9o2BFl+XSfkXzpZE3w/IEWeczET+nJDuzj9eYjAN8CUJekT0r5nLPfNh05AT8k+Z6CzUjWg== X-Received: by 2002:a17:902:e5cc:b0:1bc:5197:73c5 with SMTP id u12-20020a170902e5cc00b001bc519773c5mr2172551plf.54.1692193187739; Wed, 16 Aug 2023 06:39:47 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id b4-20020a170902d50400b001bb9b5e86b7sm13173773plg.91.2023.08.16.06.39.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Aug 2023 06:39:47 -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 4/7] rtc: cmos: Report supported alarm limit to rtc infrastructure Date: Wed, 16 Aug 2023 06:39:33 -0700 Message-Id: <20230816133936.2150294-5-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230816133936.2150294-1-linux@roeck-us.net> References: <20230816133936.2150294-1-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 --- 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..c565dc4d5bf5 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->range_max_offset =3D SECS_PER_YEAR - 1; + else if (cmos_rtc.day_alrm) + cmos_rtc.rtc->range_max_offset =3D SECS_PER_MONTH - 1; + else + cmos_rtc.rtc->range_max_offset =3D SECS_PER_DAY - 1; + rename_region(ports, dev_name(&cmos_rtc.rtc->dev)); =20 if (!mc146818_does_rtc_work()) { --=20 2.39.2