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 858F72500D8; Mon, 25 Nov 2024 07:32:25 +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=1732519945; cv=none; b=fJX4Rzyb8mx5xqLEX5HfBCRohGL9eZ7iAHEueLXolp9jpXNi5jlwb3nnkEmSBhfqAP7Ce9Bp/4VDJc5iFKkh7rr+pMN3RhZtdmHWtZobZ+a+VBLonP/AC1K6mU3FDF7zLZUkbXw9mxVPW6gb9vcDDXzie/oWpnm69U71o4XWnz8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732519945; c=relaxed/simple; bh=FwUKQ2/SnMOuxfcp6dHNTgjAOTFfQRRwa2FdtHO0dSU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=VBT9O2z43Hcp9dDX/09/OLfnEX0OoXBRElN8EoaCqczw85X3Q913aTyP3DcnBzpNeNbUC7Jn+fO/xcEs38udgrBxcG8Yw4MzRc4qS32fQi9fg2LyvT0e/vrVaIcDfhml4HeBbRct96tcTXFsMZ2WcQ6wFNrUTJ5ZMKBBQpwhrMc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QzpChmLX; 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="QzpChmLX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCCBEC4CECE; Mon, 25 Nov 2024 07:32:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732519945; bh=FwUKQ2/SnMOuxfcp6dHNTgjAOTFfQRRwa2FdtHO0dSU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=QzpChmLXdlxxV7uo4kUaVfqf0OHik/wBqzLXgxxbpKVCaOePk+Ge7aLkqrinoWO4N g0jmfQWeQK7XjrcDdInIokcxTcPU7u521ek+9JfJ3VjXB+bsbjtzPee77k2E1C9Fu0 HZ14IPrUAQinlIj72zoOz3H3oDAwczK0tRtCWvJjlYaKIi5hGQWGzYdvQ6LRr9Rmsq /6DIH8foQ4jnytaiZps4yvc8LxwPJ7GK1JZ+0SIX0y8Pp/D6QYmBE78EiGnZronqPz WcTBGx4edumYlYv1/IOJwxurVNeYmQEAjYoAb6+A6ztyQRcHdx0JDnnjFlB1vIc251 W8aHxMG9sKe0w== Message-ID: Date: Mon, 25 Nov 2024 08:32:19 +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 2/2] dt-bindings: mfd: cros-ec: add properties for thermal cooling cells To: "Sung-Chi, Li" Cc: Benson Leung , Guenter Roeck , Sebastian Reichel , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , chrome-platform@lists.linux.dev, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20241122-extend_power_limit-v1-0-a3ecd87afa76@chromium.org> <20241122-extend_power_limit-v1-2-a3ecd87afa76@chromium.org> <4f5sahkxxqb5qonh676igaiadkxv2pbhbibu6wtx4yenplfn4o@yvidi4ujavhr> 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 03:50, Sung-Chi, Li wrote: > On Fri, Nov 22, 2024 at 08:49:14AM +0100, Krzysztof Kozlowski wrote: >> On Fri, Nov 22, 2024 at 11:47:22AM +0800, Sung-Chi Li wrote: >>> The cros_ec supports limiting the input current to act as a passive >>> thermal cooling device. Add the property '#cooling-cells' bindings, such >>> that thermal framework can recognize cros_ec as a valid thermal cooling >>> device. >>> >>> Signed-off-by: Sung-Chi Li >>> --- >>> Documentation/devicetree/bindings/mfd/google,cros-ec.yaml | 3 +++ >>> 1 file changed, 3 insertions(+) >>> >>> diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml >>> index aac8819bd00b..2b6f098057af 100644 >>> --- a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml >>> +++ b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml >>> @@ -96,6 +96,9 @@ properties: >>> '#gpio-cells': >>> const: 2 >>> >>> + '#cooling-cells': >>> + const: 2 >> >> This is not a cooling device. BTW, your commit msg is somehow circular. >> "Add cooling to make it a cooling device because it will be then cooling >> device." >> >> Power supply already provides necessary framework for managing charging >> current and temperatures. If this is to stay, you need to explain why >> this is suitable to be considered a thermal zone or system cooling >> device (not power supply or input power cooling). >> >> Best regards, >> Krzysztof >> > > Thank you, I will rephrase the commit message. The reason to not to use the > managing charging current and temperatures in the power supply framework is > that: > > - The EC may not have the thermal sensor value for the charger, and there is no > protocol for getting the thermal sensor value for the charger (there is > command for reading thermal sensor values, but there is no specification for > what sensor index is for the charger, if the charger provides thermal value). > - The managing mechanism only take the charger thermal value into account, and > I would like to control the current based on the thermal condition of the > whole device. > > I will include these explanation in the following changes. This does not explain me why this is supposed to be thermal zone. I already said it, but let's repeat: This is not a thermal zone. This isn't thermal zone sensor, either. Best regards, Krzysztof