From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7E69438E8B6; Fri, 22 May 2026 10:33:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779445982; cv=none; b=GGkJCJwnygz/tVEeEUN7WNZLNIfmBqessbL/qcZSaWrb8I7YvhIa2f5fhcV6/AoZH899cLa5MW5wd76IWwCsOSI9HCbgI6BeYw6SkuAvVZi9QAbMS2947cA4ugb60yRtgPDY5y40khwUPlvWoJt+fSAGzo2VBdrdUmkoZk8xN+8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779445982; c=relaxed/simple; bh=whyH2+0ibFsszeeLwHIYw6oLd5Lex7zgfxr92ZR43KE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=KDmgJ3xRHkCMMjlhJsu0IYkvf5j3S9uyjDuc+pN7FNDc841KAoDvcTPLrj49oXeA9p8n0DJcr3qYspAIYenV0TUhKD2a/rMguos/H/ihVQ63uoK1GrnwnKX0MCoCwHvFH///RbNvDo2jlHQH62szIn15nha3eZlarVHJTFMF8hQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UX8koyq6; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="UX8koyq6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 304F71F000E9; Fri, 22 May 2026 10:32:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779445981; bh=93CaS8NpKWnfAcJ871uDkaWWZlnKletHutKotfZY+QI=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=UX8koyq6oRCdWJAaKyqWCpdQiMkw+mwRU6Ho8UJ3TIl5WWFWv2fyrsDa0agQSRpIo GYNI+NRb7GdKIsYPIXOsw9EmCVdiR2AoO5sLk9V31BbuT/DU75S8NzQmFK1P1Tf6SZ BrYcLA8b4qYmU6axhyl1k5y3k+Xh57lgPLU2fmeEBi4NlkbasUvWAm6ZKlxAET7ioR waqaeR+0GJ7mqNRW2CdgMPmEdi9LIYy0tzT5X1XxKQ9wwbM9NQyrYUm17SIf2MklbC //I1MAwa7VjTN3Agbc+6QXSbkwbDx7fED+aUi4+xV7LltxczikBeGi43p20kvdUBE7 +85nGiaErkJ7A== Message-ID: Date: Fri, 22 May 2026 12:32:56 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: soc: qcom: pmic-glink: Document batteryless property To: Konrad Dybcio , Kamal Wadhwa , jishnu.prakash@oss.qualcomm.com Cc: Rakesh Kota , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sebastian Reichel , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org References: <20260518-add_dc_in_support-v1-0-31fbaa329879@oss.qualcomm.com> <20260518-add_dc_in_support-v1-1-31fbaa329879@oss.qualcomm.com> <20260519082526.odmn5dqi2jftwnln@hu-kotarake-hyd.qualcomm.com> <20260519-first-wine-bulldog-a6a4c7@quoll> <20260521071341.q4efqssppvettaey@hu-kamalw-hyd.qualcomm.com> <86f76a81-832d-4ba5-81d5-38b46b7dc0a7@kernel.org> <6c595a5f-b979-4e8b-ae77-d28d24700588@oss.qualcomm.com> <82019c2e-6b6e-4edd-91b3-a28ef6eb09eb@oss.qualcomm.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 22/05/2026 11:24, Konrad Dybcio wrote: > On 5/21/26 11:58 AM, Krzysztof Kozlowski wrote: >> On 21/05/2026 10:46, Konrad Dybcio wrote: >>> On 5/21/26 9:20 AM, Krzysztof Kozlowski wrote: >>>>> Since firmware does not have a way to dynamically tell if it on a >>>>> debug-board powered device or a DCIN powered device, We are required to >>>>> add this new DT property. >>>> >>>> Neither debug-board powered device nor battery-less will have >>>> monitored-battery, thus again, why lack of that property cannot tell you >>>> what you need? >>> >>> A device with a battery will not have a monitored-battery either >> But why? If for such device property "no battery" is suitable, then for >> me "monitored-battery" is suitable as well. IOW, if you say that having >> a property describing batter is not a accurate hardware property here, >> then neither saying "no battery" is, because no batter is basically some >> sort of battery (just like empty set is still a set, empty array is >> still an array). > > The battmgr service running on one of the remoteprocs already has all > the information about the battery and it also handles all the type-c, > PD and charger configuration, only letting the OS know about the > results. > > Hence, unless there's some other hardware at play (e.g. for custom > 200 W charging), which wasn't fully implemented in the QC firmware, > there is no reason to describe a battery separately, since the OS > can't do anything useful with that information That's a good explanation and it implies: "no-battery" is not suitable. > > In some abstract way, perhaps monitored_battery = <&pmic_glink> could > be thought of as valid (since that's the data source the OS gets to > see) > Best regards, Krzysztof