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[72.83.177.149]) by smtp.gmail.com with ESMTPSA id x5-20020a05620a258500b006bb366779a4sm4966487qko.6.2022.10.19.08.46.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Oct 2022 08:46:54 -0700 (PDT) Message-ID: <5bf984f4-681c-7001-281f-f35bb7fdfc8b@linaro.org> Date: Wed, 19 Oct 2022 11:46:53 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode Content-Language: en-US To: Andrej Picej , 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 References: <20221019111714.1953262-1-andrej.picej@norik.com> From: Krzysztof Kozlowski In-Reply-To: <20221019111714.1953262-1-andrej.picej@norik.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 19/10/2022 07:17, Andrej Picej wrote: > 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 +++++ Please use scripts/get_maintainers.pl to get a list of necessary people and lists to CC. It might happen, that command when run on an older kernel, gives you outdated entries. Therefore please be sure you base your patches on recent Linux kernel. Best regards, Krzysztof 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 DF049C433FE for ; Wed, 19 Oct 2022 16:04:41 +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:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=DrE7+kfmbVa52Yi2YMA1LSaflKJ0ITKJfwTQvDe57J4=; b=aIxw9RdmGnPDUc 46gvIpCeeiPh6sbZGOXFmVAQYe3BVCYxvBZHSYGUaFBF5rhKq3cKoqViNSH/F8n61ysZSEhrL5Bl7 OpH1EEh06603ju8B+XD3TXOwIsGkR5IyBA/8N1pV3AjEXOL9JYavIu21t3LPxsr1SZGqZ+8nw4O7A wun+FmBjmKGkSV6xdiKBCAw+mM8UY6myEscjQLgMBEeYR5TuLFhDRME9dBnW1wyYvJANK6QJ1otA0 xgmI2IR+xKbMAC4F5/GAY856KI9Bfn03rgFlYjMDj8vlzu7WkBubPaFSCjfDTMeNSflGEcDd18YlN IPCtV77vn2+/kA4KcJJA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1olBX8-003fDM-Tz; Wed, 19 Oct 2022 16:03:07 +0000 Received: from mail-qv1-xf35.google.com ([2607:f8b0:4864:20::f35]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1olBHV-003T1k-Rt for linux-arm-kernel@lists.infradead.org; Wed, 19 Oct 2022 15:46:59 +0000 Received: by mail-qv1-xf35.google.com with SMTP id y10so11615880qvo.11 for ; Wed, 19 Oct 2022 08:46:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=vrFWkLuR3jMPPnmrB2JfbwYDWpDDskQjLWBXZha57GU=; b=xYXM2Z2ltScJJy4QcFwBtAffA5VWVcQlo0S4/hkyRqt6H5Ks0RZJaxlhTBsI79Y6eN nFnWo+u0hMFbF+VjkYxxKp+38kEspd1VSYB6/PdEweaqtWhrXgtAYIAiFXL+mWiPl7/1 s18tySpWt6wCd4+mWeTq5U1FX6M/8M4U7KWZZ64r26KeultSol1gEqKyChFaiqmX/+E/ CjoBpmukF21eVQ5eVK6bdttdvO6zb8sehxxW8jtB2s76ZX5Rulr0F3PrLm7JBNweclVb LbAaRWMWqp7rlp15YmWqHsBkChiZY/rZpxLlKMMnWQ71YaUzu8nKg+myW36d3vIdMkMY iBKw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=vrFWkLuR3jMPPnmrB2JfbwYDWpDDskQjLWBXZha57GU=; b=THtgjaGi/Zv5qOmtstrSQGmeqd63H5Kyd7iS/YmKr6Zlcwsf4475UdnfCKQqZPY1Dw UyYAY+gy4ujE/x3oadBybF3oPP4mneKAOUgowqaQ7AzRnIudAEWFhBc3zzR9jk/dwUTh hUHcazNoxUl0A/PvmDoF1qDkOVEwaAkZiPn7wKKdvpb7erCMOj3pxZrROfGUYfic8fXk +Od4CHoHAUkq4P9+6MtVT/IlyLLYnQJ97+OepJeG9mo/9brBF84kV44nd+S9XgIvI3cz ZtC2I6nuNIfJMgLn2J3uId+uM4/YneN2wcGiqA7+EKI41qM5jiMmCwD2tZQAu0IAIG/H gatQ== X-Gm-Message-State: ACrzQf0ETsj71IJVgiy/sGrBXnWSIaijtkd+ox7wBtBCZO29/tsfkld2 Z9PHK9cmDSvn6N8bRatip+Gdow== X-Google-Smtp-Source: AMsMyM7tuiMw+QrtUrI0S4X8+zom/Ro5V8tZ6UfEyKSPIYgWvqIcLfEZfPwJd3CWu3zGvXED1w2vBw== X-Received: by 2002:ad4:5bc1:0:b0:4ad:34b2:d29c with SMTP id t1-20020ad45bc1000000b004ad34b2d29cmr7300069qvt.21.1666194415380; Wed, 19 Oct 2022 08:46:55 -0700 (PDT) Received: from [192.168.10.124] (pool-72-83-177-149.washdc.east.verizon.net. [72.83.177.149]) by smtp.gmail.com with ESMTPSA id x5-20020a05620a258500b006bb366779a4sm4966487qko.6.2022.10.19.08.46.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Oct 2022 08:46:54 -0700 (PDT) Message-ID: <5bf984f4-681c-7001-281f-f35bb7fdfc8b@linaro.org> Date: Wed, 19 Oct 2022 11:46:53 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode Content-Language: en-US To: Andrej Picej , 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 References: <20221019111714.1953262-1-andrej.picej@norik.com> From: Krzysztof Kozlowski In-Reply-To: <20221019111714.1953262-1-andrej.picej@norik.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221019_084657_969833_C2E507CF X-CRM114-Status: GOOD ( 14.75 ) 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 On 19/10/2022 07:17, Andrej Picej wrote: > 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 +++++ Please use scripts/get_maintainers.pl to get a list of necessary people and lists to CC. It might happen, that command when run on an older kernel, gives you outdated entries. Therefore please be sure you base your patches on recent Linux kernel. Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel