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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EA09CC4332F for ; Wed, 19 Oct 2022 11:18:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=g1oL2wcErJzFtW/cgguGiLagmsvnpCTgGZO66jL8ofo=; b=OorKmOpkprPPJU Rpb0wjH/OodNh57acQfQ0e30hR03k/XEtGWAaUEZpHrtKc2GuR4njQKLa5/2ILdviS6XxEg71AgZi 4XUdIx1PFkA6nNfRa1OWHeNg8kv23UXwZuQvmchPphqB8n64jb6vIeywLX3EI3/pcSqg/F6Tol+5X Zcfyxhqo7Tu/LaWON86csO+UZ8xtEtcRJ2aV4d79A7fP1FxUZpCeRJU2sbMYVvIhAHAAM0g2scQWe k4dWLDgvDx3NPDbfBSCSymIpe3hu9gToQ2wXRhtFpidT8IVJhWJmNOUDuBlFwls/HsgJdzwyl1TOO JpD8T6yNB8/tQgQKOOpQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ol754-000s9o-8M; Wed, 19 Oct 2022 11:17:50 +0000 Received: from cpanel.siel.si ([46.19.9.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ol74i-000s2Y-6A for linux-arm-kernel@lists.infradead.org; Wed, 19 Oct 2022 11:17:31 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=norik.com; s=default; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject: Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=XOXKSdEYSGaB7TrIJqdXmUIfhtXAEMTKYNQDMHu+5+o=; b=iAftC1DlOniMYlNZSSECpiAdeK LccPSIzdRYsfUO01CsO4alVE/fGnwRYwuh8yCWnIyezwJNnfoiLw0dKNibZEPkgoU07mbmtoHlk6D v8nmmHEq6NPHZRQybIes4CrRSzpAzY5RERGXNFZYXgDwYO/fEz2pA+H53F/Jahf9Wr0EEGdCGqxVN EhK9t8DAknnY4QX0DtgQ3cJ9AAKS3DqF95q3OFiRP66AP5SNMKSz3pDVKLdEEZHu92HTyylPMN7QH fI+2Lzgv5u7mBvsVw+h7SmvW6hAakvBc7xYTQxIJvQltEk6GgkxRFjR734Ybh+4A5r58CcKpokDcO IVu/kW/A==; Received: from 89-212-21-243.static.t-2.net ([89.212.21.243]:45936 helo=localhost.localdomain) by cpanel.siel.si with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.95) (envelope-from ) id 1ol74W-007ZXa-71; Wed, 19 Oct 2022 13:17:16 +0200 From: Andrej Picej To: linux-watchdog@vger.kernel.org Cc: shawnguo@kernel.org, linux@roeck-us.net, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-imx@nxp.com, festevam@gmail.com, kernel@pengutronix.de, s.hauer@pengutronix.de, wim@linux-watchdog.org, robh+dt@kernel.org Subject: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode Date: Wed, 19 Oct 2022 13:17:11 +0200 Message-Id: <20221019111714.1953262-1-andrej.picej@norik.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel.siel.si X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - norik.com X-Get-Message-Sender-Via: cpanel.siel.si: authenticated_id: andrej.picej@norik.com X-Authenticated-Sender: cpanel.siel.si: andrej.picej@norik.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221019_041728_758249_B1D68E3A X-CRM114-Status: UNSURE ( 5.62 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The i.MX6 watchdog can't be stopped once started. This means that special hardware suspend needs to be configured when the device enters low-power modes. Usually i.MX devices have two bits which deal with this: - WDZST bit disables the timer in "deeper" low power modes and - WDW bit disables the timer in "WAIT" mode which corresponds with Linux's "freeze" low-power mode. WDZST bit support is already in place since 1a9c5efa576e ("watchdog: imx2_wdt: disable watchdog timer during low power mode"). WDW bit is not common for all imx2-wdt supported devices, therefore use a new device-tree property "fsl,suspend-in-wait" which suspends the watchdog in "WAIT" mode. Andrej Picej (3): watchdog: imx2_wdg: suspend watchdog in WAIT mode dt-bindings: watchdog: fsl-imx: document suspend in wait mode ARM: dts: imx6ul/ull: suspend i.MX6UL watchdog in wait mode .../devicetree/bindings/watchdog/fsl-imx-wdt.yaml | 5 +++++ arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi | 4 ++++ drivers/watchdog/imx2_wdt.c | 7 +++++++ 3 files changed, 16 insertions(+) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel