From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3447C47E4D for ; Wed, 14 Jul 2021 19:48:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ABCA9613CA for ; Wed, 14 Jul 2021 19:48:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241256AbhGNTu2 (ORCPT ); Wed, 14 Jul 2021 15:50:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:37098 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237061AbhGNTqe (ORCPT ); Wed, 14 Jul 2021 15:46:34 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E7753613E9; Wed, 14 Jul 2021 19:42:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626291765; bh=E+iOY2yzXNa/d+8Y+LyMMqT6lx3jzGNbC2lLNqo6/cM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GQwB5rxx+H+fobHhOWc2JLdw1iOx1Vza7x7Un0QtwaFp7VYTwCrMEq1Tc2BLGOjyC +f4+upwqW8NIyPvANxWBe9NT45Qjkkw+t3PD/ZMPHtjKNc5ujQWXEFd6ozwanINp1m j+Y+kaxyc4j5bI2KpQgnUv0zt3hat34dEmnyvrlb542dRbKM8RhLHXpP9Gum6qWqQl 2BrHzYlUsS+LuS+AFZIFznr7yaNwYkmqvylJ2dzU9H+3dzrKcNJ2WF2wwwMZUI0wnH w/WkY6+4bwFLllBwcYBO1SGvNDO4hwezEJX6/ENrDyrwPit+i9FQXgQe+bRtl7yE1b pl9FwgIThmqJw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Krzysztof Kozlowski , Alexandre Belloni , Sasha Levin , linux-rtc@vger.kernel.org Subject: [PATCH AUTOSEL 5.12 091/102] rtc: max77686: Do not enforce (incorrect) interrupt trigger type Date: Wed, 14 Jul 2021 15:40:24 -0400 Message-Id: <20210714194036.53141-91-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210714194036.53141-1-sashal@kernel.org> References: <20210714194036.53141-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Krzysztof Kozlowski [ Upstream commit 742b0d7e15c333303daad4856de0764f4bc83601 ] Interrupt line can be configured on different hardware in different way, even inverted. Therefore driver should not enforce specific trigger type - edge falling - but instead rely on Devicetree to configure it. The Maxim 77686 datasheet describes the interrupt line as active low with a requirement of acknowledge from the CPU therefore the edge falling is not correct. The interrupt line is shared between PMIC and RTC driver, so using level sensitive interrupt is here especially important to avoid races. With an edge configuration in case if first PMIC signals interrupt followed shortly after by the RTC, the interrupt might not be yet cleared/acked thus the second one would not be noticed. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20210526172036.183223-6-krzysztof.kozlowski@canonical.com Signed-off-by: Sasha Levin --- drivers/rtc/rtc-max77686.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c index d51cc12114cb..eae7cb9faf1e 100644 --- a/drivers/rtc/rtc-max77686.c +++ b/drivers/rtc/rtc-max77686.c @@ -717,8 +717,8 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info) add_rtc_irq: ret = regmap_add_irq_chip(info->rtc_regmap, info->rtc_irq, - IRQF_TRIGGER_FALLING | IRQF_ONESHOT | - IRQF_SHARED, 0, info->drv_data->rtc_irq_chip, + IRQF_ONESHOT | IRQF_SHARED, + 0, info->drv_data->rtc_irq_chip, &info->rtc_irq_data); if (ret < 0) { dev_err(info->dev, "Failed to add RTC irq chip: %d\n", ret); -- 2.30.2