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([2a01:e34:ed2f:f020:d199:47e7:7c84:8d62]) by smtp.googlemail.com with ESMTPSA id e4sm5392184wrh.39.2019.08.15.09.12.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 15 Aug 2019 09:12:52 -0700 (PDT) Subject: Re: [PATCH V5 5/5] arm64: dts: imx8mm: Enable cpu-idle driver To: Anson.Huang@nxp.com, catalin.marinas@arm.com, will@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tglx@linutronix.de, leonard.crestez@nxp.com, aisheng.dong@nxp.com, daniel.baluta@nxp.com, ping.bai@nxp.com, l.stach@pengutronix.de, abel.vesa@nxp.com, andrew.smirnov@gmail.com, ccaione@baylibre.com, angus@akkea.ca, agx@sigxcpu.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20190710063056.35689-1-Anson.Huang@nxp.com> <20190710063056.35689-5-Anson.Huang@nxp.com> From: Daniel Lezcano Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190710063056.35689-5-Anson.Huang@nxp.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Anson, sorry for the late review, I've been pretty busy. If Shawn is ok, I can pick the patches 1-4 in my tree and then this one after you fix the comments below. On 10/07/2019 08:30, Anson.Huang@nxp.com wrote: [ ... ] > + idle-states { > + entry-method = "psci"; > + > + cpu_sleep_wait: cpu-sleep-wait { Is that a retention state or a powerdown? It is preferable to change the name to the idle state naming convention given in the PSCI documentation [1] page 16-17 > + compatible = "arm,idle-state"; > + arm,psci-suspend-param = <0x0010033>; > + local-timer-stop; > + entry-latency-us = <1000>; > + exit-latency-us = <700>; > + min-residency-us = <2700>; > + wakeup-latency-us = <1500>; It is pointless to specify the entry + exit *and* the wakeup-latency [2]. Thanks -- Daniel [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/cpuidle/dt_idle_states.c#n41 -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog 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=-7.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 C68DEC3A589 for ; Thu, 15 Aug 2019 16:13:15 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 97780206C1 for ; Thu, 15 Aug 2019 16:13:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="SSHAJ3kh"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="eiC7bBGV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 97780206C1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Cc:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=09487TIsXAtJoRx7gsXGy0s5DnGK9pIuraHEAW2kDmw=; b=SSHAJ3khBTxzynd50BZpCyDH+g E5tgAQZRv1QoaRC02AZHHXGs6XCxgRrkyOpXqUfSJFEq8v7J/tieRgBJgftYwYOdWadrVUu5M8wdQ 0JjDozSTFnpm7wDpX6+QATr2yYpz0rRxw8jf3Rwa51aiBB3SEO73UjJXZkB04prejyo85E74c8A2R MPdKUx3t7urxn+4/Ir98gG/z5o6povD/oRzg6+fNQSU9ZSCcdXi2ouyBeUju8x0SQWCtZ4LLOSsGJ 7sMmvNjsZ1XxFX/qzSvrE/waVbBauPf2+intJqJllZIvivIMDbjs8RxWjaIvc+XIVSoimUVXl9/pr zA1PXg4Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hyINA-0006CT-5s; Thu, 15 Aug 2019 16:13:08 +0000 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hyIN2-0006B8-Ny for linux-arm-kernel@lists.infradead.org; Thu, 15 Aug 2019 16:13:06 +0000 Received: by mail-wr1-x442.google.com with SMTP id z11so2705361wrt.4 for ; Thu, 15 Aug 2019 09:12:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:references:from:openpgp:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=lqiqYNpMEwE3vp9HpU1QGUTltN60oHlM1/c3puuxpJk=; b=eiC7bBGVZ39pEFW/EDFlf9ynLuq1YbN9SoqgXB+7p7+riposGCbB9b0vGUohZImO+8 8PA6q0hgVUjO8eExZoXTf2qa7OVQjqKnCqtJk1+Wg15mclOqMrWU95i3XrPztxbcgkSK 0yNTH4AujaQCyxFRKYxi4m1FaWoyuq80WCI2aDZfTVVuUXdkS2Nm36BHS3QwUTeT+WYu X9DUSGYRtYvZZcHDl8cAuLBS+6rsBHxvqn5e5A2zDNTXOfNs9uLGqYIlnSKfGwE5qnI/ YM4so0pb9EOr8VI/v3l8hi8hDDjJkFbpEdW81efIx3VitriFyq3ov+x1pHA65G/rdi9F 0GAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=lqiqYNpMEwE3vp9HpU1QGUTltN60oHlM1/c3puuxpJk=; b=HudH/f4YFvWOpy7mRrTI0EeSrApNkLYpO7YAIM/ZpdgYrrGJbom+a3R9OoA/uCHz1z 1isnnE4GeL8gs/7RR0IhkPzJY14+gatyt9CPPieMT4j0TtSwm+grlfSqfOvcLPwwhrgx 33CyAyEKwKqtxs26hTLwqs2Aec67dmY2BOKj/A9F3Vy0EVwiVjNymq0c9nWbUaxXhspk avyeD5Y0odV3EcZe/LXwxyaEQl2a7Z78svgX7LVbPnfaalsgyzBfOzS87u6sEvnCq0Di ZdvEq1B5CHWsEinbS/n9Cyh84Ss6AsCx7t02C8UlWo1FQ+mseUT7ripnwZWbn0Ic6Rue besQ== X-Gm-Message-State: APjAAAVYvUY4m39qmIqwRk/kA8Vq3Zd6GwlH2IDomRDczABUjode9Bnv shYUw0j4F50K7tgP0Ij3lIX8Og== X-Google-Smtp-Source: APXvYqyoeSWzfMHJxYuIR0JuauY1YoJyaqepJYnL78QPvsTh/t3747HGVi+MWLA6qCvGIC2pnXqVdA== X-Received: by 2002:adf:e4c6:: with SMTP id v6mr5944264wrm.315.1565885572647; Thu, 15 Aug 2019 09:12:52 -0700 (PDT) Received: from ?IPv6:2a01:e34:ed2f:f020:d199:47e7:7c84:8d62? ([2a01:e34:ed2f:f020:d199:47e7:7c84:8d62]) by smtp.googlemail.com with ESMTPSA id e4sm5392184wrh.39.2019.08.15.09.12.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 15 Aug 2019 09:12:52 -0700 (PDT) Subject: Re: [PATCH V5 5/5] arm64: dts: imx8mm: Enable cpu-idle driver To: Anson.Huang@nxp.com, catalin.marinas@arm.com, will@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tglx@linutronix.de, leonard.crestez@nxp.com, aisheng.dong@nxp.com, daniel.baluta@nxp.com, ping.bai@nxp.com, l.stach@pengutronix.de, abel.vesa@nxp.com, andrew.smirnov@gmail.com, ccaione@baylibre.com, angus@akkea.ca, agx@sigxcpu.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20190710063056.35689-1-Anson.Huang@nxp.com> <20190710063056.35689-5-Anson.Huang@nxp.com> From: Daniel Lezcano Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; 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