From nobody Tue Dec 2 02:28:05 2025 Received: from out-177.mta0.migadu.com (out-177.mta0.migadu.com [91.218.175.177]) (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 1471130CD83 for ; Thu, 20 Nov 2025 08:20:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763626810; cv=none; b=J6VU0TBEh5Sy33IBdc5q5rDAZoVpIH/42J1M9l80sjnmCehs5P6wcHQKnKsbrmRk3qYDv3ru+S1AfY+EzQ7xXY3s1qx+qBRUNcEuq05DUx8S6wYsRaCH1oDmSuRtqq7OAm/UDgKUk1RqYcr9ZH2KC1TUe9J/I6MtABTDcIDzR98= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763626810; c=relaxed/simple; bh=6GjRBxIEq16fvySibBGoXBETlm2Ts8lIXfMePHALfHM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Bs5oKR98PQEBFJ9Uqs+rt8m+ieO/J1bCuMlehnXNw5qzrbXU38L9In8ealFIGWeVobKNPPTjwUjZm86kBm8wpmO5Vi5Mnb2bSyi7sl7IKcAMTwFELGxJCEE5BjRYjx9dRhGshFayIGEA/O8wuMgEL0kPU14cLIrZwcXD9HFBV04= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=JYXDB66v; arc=none smtp.client-ip=91.218.175.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="JYXDB66v" Date: Thu, 20 Nov 2025 10:19:56 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1763626805; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=yfYUQcha5v1Ro+j4Y2wvfYErfjiZB7zoAjiaqjqPWso=; b=JYXDB66vuKNXEk2D3132rkddGcxfAVPUElUP5/vKLGgxXccAwZDDK/c8R3TCKK5doobnPg CJCy5oThvA9ODv7CI08v101zc5r9jTNyfZyIjDDYls4eR8gfn3azpgKw9V+gx537WAm4Rq xj8vpG1mIo+r0LG/koQNOO2smC0AT94= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Lee Jones , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sebastian Reichel , Liam Girdwood , Mark Brown , Michael Turquette , Stephen Boyd , Matti Vaittinen , Linus Walleij , Bartosz Golaszewski , Alexandre Belloni , linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, linux-rtc@vger.kernel.org, Andreas Kemnade Subject: [PATCH v5 02/16] dt-bindings: battery: Clarify trickle-charge Message-ID: <0b12e7761c670b228f3a4c49736c838a38fbcc81.1763625920.git.mazziesaccount@gmail.com> Reply-To: Matti Vaittinen References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="zdzOgAxX3iPmgcNW" Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT --zdzOgAxX3iPmgcNW Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Matti Vaittinen The term 'trickle-charging' is used to describe a very slow charging phase, where electrons "trickle-in" the battery. There are two different use-cases for this type of charging. At least some Li-Ion batteries can benefit from very slow, constant current, pre-pre phase 'trickle-charging', if a battery is very empty. Some other batteries use top-off phase 'trickle-charging', which is different from the above case. The battery bindings use the term 'trickle-charge' without specifying which of the use-cases properties are addressing. This has already caused some confusion. Clarify that the 'trickle-charge-current-microamp' refers to the first one, the "pre-pre" -charging use-case. Suggested-by: Krzysztof Kozlowski Signed-off-by: Matti Vaittinen Reviewed-by: Krzysztof Kozlowski Reviewed-by: Linus Walleij --- Revision history: v3 =3D> : - No changes v2 =3D> v3: - New patch --- .../devicetree/bindings/power/supply/battery.yaml | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/power/supply/battery.yaml b/= Documentation/devicetree/bindings/power/supply/battery.yaml index 491488e7b970..bfb7b716ae13 100644 --- a/Documentation/devicetree/bindings/power/supply/battery.yaml +++ b/Documentation/devicetree/bindings/power/supply/battery.yaml @@ -64,7 +64,12 @@ properties: description: battery design capacity =20 trickle-charge-current-microamp: - description: current for trickle-charge phase + description: current for trickle-charge phase. + Please note that the trickle-charging here, refers "wake-up" or + "pre-pre" -charging, for very empty batteries. Similar term is also + used for "maintenance" or "top-off" -charging of batteries (like + NiMh bq24400) - that is different and not controlled by this + property. =20 precharge-current-microamp: description: current for pre-charge phase --=20 2.51.1 --zdzOgAxX3iPmgcNW Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEIx+f8wZb28fLKEhTeFA3/03aocUFAmkezywACgkQeFA3/03a ocXYYQf/VF3miohBdq8SjlP0EDn8Hu4OBOPvuTttflpQJzsBgS/dACSOqBUI/RxF heA/ZSqAZuZx3Ud6uTzS5m3v76W0pz0dnNJk+R4NUwDL30IQD7XnBaTzmV1hv80D 7+XWCtV35sV53uVCW79BRkH6pb810MlVWiA1d+gJwuZRFKyzg/qP39eKaP8i3gZE NH7D/XKIiXKOr6fNmM0ADw3aH/ozNs03D9tBuPFc7aXEiyBtuvZl+J7/+or7kE71 KzN1AMJdYjBOj7ldQ0oWUg0o2JEA8lHTh7kamg3zxpncOfnHcohcLAOVSb8UAWsS 2dkd1M3JS/mv6FInTgkqa6rVpjm5eA== =/tgU -----END PGP SIGNATURE----- --zdzOgAxX3iPmgcNW--