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([2a01:e34:ed2f:f020:e537:d458:d3c4:18e1]) by smtp.googlemail.com with ESMTPSA id v15sm5701683wrw.24.2021.06.11.00.45.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Jun 2021 00:45:52 -0700 (PDT) Subject: Re: [PATCH] arm64: dts: meson: vim3: reduce cpu thermal fan trigger temperature To: Nick Xie , Neil Armstrong Cc: robh+dt@kernel.org, khilman@baylibre.com, jbrunet@baylibre.com, martin.blumenstingl@googlemail.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, Nick , artem@khadas.com References: <20210609012849.797576-1-xieqinick@gmail.com> <11da3ae4-91d4-1e51-c652-e4ad518f13bd@baylibre.com> From: Daniel Lezcano Message-ID: <09c65310-9441-9b97-d9ae-4695f0dd16af@linaro.org> Date: Fri, 11 Jun 2021 09:45:51 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/06/2021 09:30, Nick Xie wrote: > Hello Neil, > > > Neil Armstrong 于2021年6月11日周五 下午3:15写道： >> >> Hi, >> >> On 11/06/2021 08:54, Nick Xie wrote: >>> Hello Neil, >>> >>> The MCU FAN won't work until the temperature reach to 80 degree centigrade, >>> Do you think the temperature is too high? >> >> I think 80 is tool high, but I fear 50 is way too low, but if you think 50 is OK after you ran some tests, just add it to the commit log and it's ok for me. > > I think it is OK, we use it for a long time. 50°C sounds like normal temperature with regular load. That means the fan will be switched on most of the time when the board is used. And this change may be put in regard with the other trip points in the common DT. For instance, enable the fan when reaching 80°C but set the passive trip point to 75°C instead of 85°C. All that depends on the hardware characteristics and TDP which are in the TRM normally. -- 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=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 AC8BCC4743D for ; Fri, 11 Jun 2021 07:48:57 +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 74C1861285 for ; Fri, 11 Jun 2021 07:48:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 74C1861285 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+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.20210309; 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:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=VgEiZFZ+mXOklcOajj2gUWpsfPA6F+eBhVdjsT9hMkY=; b=ynGsYcHxPfU4dPHCsDiFcyXeNR bjgT0vwOQbJoOqmm3Dj2Y3kdBveKc07QF0RxnPcNCOzO4gJGXJm+SmAoTFczMHEc2iA11bgha4Y1n 6CNVE/JSv+8X/gIuckQDrn+YZ4vo47CRWYq+yUa8ZianEPy79flKWk5T78jdnGSpiJTZtHBDENbjX Ubg5SMYMH/VYZJeCMM/BlFQnCqYjcPJx9M/8jAAm9a6aGHjdK/JotUeAZh5dH0thumK4n0IwOyuk8 zgxp3Gyx/v6t3rJEhsSz2YXfv4yULmEqJXEh4MsUQ2n7Do3RleoOT2R5jT4pwYFPHaQOLgZHCDs61 dLPeLABg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lrbsZ-004Chv-7Z; Fri, 11 Jun 2021 07:46:59 +0000 Received: from mail-wr1-f47.google.com ([209.85.221.47]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lrbsV-004Ce8-KF for linux-arm-kernel@lists.infradead.org; Fri, 11 Jun 2021 07:46:57 +0000 Received: by mail-wr1-f47.google.com with SMTP id q5so4974457wrm.1 for ; Fri, 11 Jun 2021 00:46:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=jyVLRP1QkA2IL6a5f5yksm2l9IPiad2Lfrho8JCrB80=; b=tnUXwEtIxNsUkR3juOymwq8NsDACLFO4UY9stNt8nf4fnyEfeLnMLJRCJ4WQrBSTVo YXthzzdbMkbartaX3GNqDiGY4Gz7qS9h7XO2LM1KW0jgywjEjW8YmTfPj6o9v5fL/yxE b9mjgp5A6ZiodETFvTQAp9m5YaYuipu2JP+jI5qYapY0Qf+qqvtB3sunq5gEnCh9WtkM R//r15ndCwJfRN6O4LT1G4c1oQ9pBNogvUVYa7pZeYik7xN9OVlPoL5dpPlCSGuCReOI RjsU/AFnUKF2BOQnHb+fLoueJveCWv+LFh4UewSsRxnBpkIIyGQq7bq1QNw6Bg7hqn9i gDDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=jyVLRP1QkA2IL6a5f5yksm2l9IPiad2Lfrho8JCrB80=; b=AHJFNPwf5YiK0oQBeHMJBaUksble5Ch5guqAvsPBXRNXeMK2vYc/s6oIoMVzTlVFeU 5TH7Tg6qUucYeYuabcCBY+LoSJWB8QU41N8Ho/aAyazKEfSOthi8CX7RscnztwJfKAhm p5uxLgYGFWKx6ag3QrWxIptiqH6z/g5efIw3xoP0g+NKykOCScQDjzuAYlmbp6ORnEwR a8D9UuoEpAHBcz9GIG5uGvofDV1dRXVZveA6APy/8IDm9EVlIeJ0bbrO0TwPJnaGwhZ/ 33gAHDuIQc+/9z4h0gOHEUDLuPFJ4lgfLFG2Qwd3cQi+S1C7jLdtLjt0t5+c8RQYtQAY ZqRg== X-Gm-Message-State: AOAM532/TP6nU+DuO65oXHnPafZK3oPQ/gqHN6oLt4IY9vIg6he43e62 DNt6XoyHkPBJm2YXPtPR8BSXmg== X-Google-Smtp-Source: ABdhPJzdpXeCEBaZqW+gbgn/Y7fTCnLbcAraMgni6bIzcHxjI8moZxc8QRHIancTbR/BoSfZr7KBAw== X-Received: by 2002:adf:f1ca:: with SMTP id z10mr2557658wro.396.1623397553262; Fri, 11 Jun 2021 00:45:53 -0700 (PDT) Received: from ?IPv6:2a01:e34:ed2f:f020:e537:d458:d3c4:18e1? 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([2a01:e34:ed2f:f020:e537:d458:d3c4:18e1]) by smtp.googlemail.com with ESMTPSA id v15sm5701683wrw.24.2021.06.11.00.45.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Jun 2021 00:45:52 -0700 (PDT) Subject: Re: [PATCH] arm64: dts: meson: vim3: reduce cpu thermal fan trigger temperature To: Nick Xie , Neil Armstrong Cc: robh+dt@kernel.org, khilman@baylibre.com, jbrunet@baylibre.com, martin.blumenstingl@googlemail.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, Nick , artem@khadas.com References: <20210609012849.797576-1-xieqinick@gmail.com> <11da3ae4-91d4-1e51-c652-e4ad518f13bd@baylibre.com> From: Daniel Lezcano Message-ID: <09c65310-9441-9b97-d9ae-4695f0dd16af@linaro.org> Date: Fri, 11 Jun 2021 09:45:51 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210611_004555_443408_5BEB6CFC X-CRM114-Status: GOOD ( 14.83 ) X-BeenThere: linux-amlogic@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="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org T24gMTEvMDYvMjAyMSAwOTozMCwgTmljayBYaWUgd3JvdGU6Cj4gSGVsbG8gTmVpbCwKPiAKPiAK PiBOZWlsIEFybXN0cm9uZyA8bmFybXN0cm9uZ0BiYXlsaWJyZS5jb20+IOS6jjIwMjHlubQ25pyI MTHml6XlkajkupQg5LiL5Y2IMzoxNeWGmemBk++8mgo+Pgo+PiBIaSwKPj4KPj4gT24gMTEvMDYv MjAyMSAwODo1NCwgTmljayBYaWUgd3JvdGU6Cj4+PiBIZWxsbyBOZWlsLAo+Pj4KPj4+IFRoZSBN Q1UgRkFOIHdvbid0IHdvcmsgdW50aWwgdGhlIHRlbXBlcmF0dXJlIHJlYWNoIHRvIDgwIGRlZ3Jl ZSBjZW50aWdyYWRlLAo+Pj4gRG8geW91IHRoaW5rIHRoZSB0ZW1wZXJhdHVyZSBpcyB0b28gaGln aD8KPj4KPj4gSSB0aGluayA4MCBpcyB0b29sIGhpZ2gsIGJ1dCBJIGZlYXIgNTAgaXMgd2F5IHRv byBsb3csIGJ1dCBpZiB5b3UgdGhpbmsgNTAgaXMgT0sgYWZ0ZXIgeW91IHJhbiBzb21lIHRlc3Rz LCBqdXN0IGFkZCBpdCB0byB0aGUgY29tbWl0IGxvZyBhbmQgaXQncyBvayBmb3IgbWUuCj4gCj4g SSB0aGluayBpdCBpcyBPSywgd2UgdXNlIGl0IGZvciBhIGxvbmcgdGltZS4KCjUwwrBDIHNvdW5k cyBsaWtlIG5vcm1hbCB0ZW1wZXJhdHVyZSB3aXRoIHJlZ3VsYXIgbG9hZC4gVGhhdCBtZWFucyB0 aGUKZmFuIHdpbGwgYmUgc3dpdGNoZWQgb24gbW9zdCBvZiB0aGUgdGltZSB3aGVuIHRoZSBib2Fy ZCBpcyB1c2VkLgoKQW5kIHRoaXMgY2hhbmdlIG1heSBiZSBwdXQgaW4gcmVnYXJkIHdpdGggdGhl IG90aGVyIHRyaXAgcG9pbnRzIGluIHRoZQpjb21tb24gRFQuIEZvciBpbnN0YW5jZSwgZW5hYmxl IHRoZSBmYW4gd2hlbiByZWFjaGluZyA4MMKwQyBidXQgc2V0IHRoZQpwYXNzaXZlIHRyaXAgcG9p bnQgdG8gNzXCsEMgaW5zdGVhZCBvZiA4NcKwQy4KCkFsbCB0aGF0IGRlcGVuZHMgb24gdGhlIGhh cmR3YXJlIGNoYXJhY3RlcmlzdGljcyBhbmQgVERQIHdoaWNoIGFyZSBpbgp0aGUgVFJNIG5vcm1h bGx5LgoKCi0tIAo8aHR0cDovL3d3dy5saW5hcm8ub3JnLz4gTGluYXJvLm9yZyDilIIgT3BlbiBz b3VyY2Ugc29mdHdhcmUgZm9yIEFSTSBTb0NzCgpGb2xsb3cgTGluYXJvOiAgPGh0dHA6Ly93d3cu ZmFjZWJvb2suY29tL3BhZ2VzL0xpbmFybz4gRmFjZWJvb2sgfAo8aHR0cDovL3R3aXR0ZXIuY29t LyMhL2xpbmFyb29yZz4gVHdpdHRlciB8CjxodHRwOi8vd3d3LmxpbmFyby5vcmcvbGluYXJvLWJs b2cvPiBCbG9nCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpsaW51eC1hbWxvZ2ljIG1haWxpbmcgbGlzdApsaW51eC1hbWxvZ2ljQGxpc3RzLmluZnJhZGVh ZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1h bWxvZ2ljCg==