From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C6ABA18A95A; Mon, 25 Nov 2024 08:45:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732524319; cv=none; b=U1VYP7BWU0UHlZ1Xvp2Se9TNf06Gs3A3Xc4xLqTVoSR2cRjkX0f5OwazACnAg7WMc931s0weQSTIGdb/r94mhLE9/sEaLnjYqiKSo8n6keHJit9zY3agFrSuguv/KQMp/lLJ8pAhwlH9cHUY11uoYV8GVCh4472sviXTEKh1V1c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732524319; c=relaxed/simple; bh=3bD+WNWS17GnhYcZS5SAYjPrdscErELn+VNjYJp6RP8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Sy8WShTcxXxmt1DnjEoImk7rfFohM4rCOXLMZCq50IocRtkDrWYRt0MP2R9k+TMOEQQyb9JjyTWkF7DikW+aRrnSClSVpm+YNIKBkiQ2EhQBF6xS9XlLDZpGSbrXbW7ZfepgSdrECD6a1YqBWPk7N7V/r81VTQ8/M6gJEnRn2mQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KyT8H+fE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KyT8H+fE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2ED8DC4CED7; Mon, 25 Nov 2024 08:45:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732524319; bh=3bD+WNWS17GnhYcZS5SAYjPrdscErELn+VNjYJp6RP8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=KyT8H+fEIMTH3u216rF+/RfwXB9Wjt4RfkcWrcWeAwXLzDrIlfFr8BaZcXTwXrlEW 51zMLb8UrSJU02ByXDHZ6wxNGqI8yAe0tqseRYr/buu94Vca6nVANF5xwdLwok4z0S u6Yo4eL/3QGc2ee6EOGThKikUIwaFmoYiEpRwIiMb3YHYstjqOLAueKm/69Wvp/cVL QcSaSBx13/26FYS0pFMklWg3uBnolaKo7urIjKzjMbEJOQGYG+UF252H+vo/o533qT 0mszMOdmizont4XI+vWvMEoSOeQkKZUX+f+PEH4qBMoYTn0TZxotxOISE0g523vzKR vbj7YHHxFY5mg== Message-ID: Date: Mon, 25 Nov 2024 09:45:12 +0100 Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] dt-bindings: mfd: cros-ec: add properties for thermal cooling cells To: Sung-Chi Li , Benson Leung , Guenter Roeck , Sebastian Reichel , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: chrome-platform@lists.linux.dev, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20241125-extend_power_limit-v2-0-c3266a86e9b1@chromium.org> <20241125-extend_power_limit-v2-2-c3266a86e9b1@chromium.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 25/11/2024 09:31, Sung-Chi Li wrote: > A charger chip is connect to the ChromeOS Embedded Controller (EC). > When external power input into the system, current would go through the > charger chip, generating heat in the system. The EC supports limiting > the input current, thus reducing the generated heat. As a result, EC is > a simulated passive cooling device. EC is not part of the SoC, therefore this is not a cooling device. It is not thermal sensor either, but this you pushed before I could object. > > We cannot reuse the existing charge managing mechanism in the power > framework due to: > > - The power framework requires the charger to expose its thermal status, > which is not a supported functionality on EC. Fix power framework then. > - We need to use different thermal sensors to run thermal control, > rather than using thermal sensor on the charger. Nothing stops you from using thermal sensors or thermal control. Still, this is not part of SoC, this is not thermal zone and this is not a SoC cooling device. NAK Best regards, Krzysztof