From nobody Sun Feb 8 18:09:10 2026 Received: from out-189.mta0.migadu.com (out-189.mta0.migadu.com [91.218.175.189]) (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 EFBBB2D23A8 for ; Wed, 5 Nov 2025 07:36:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.189 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762328186; cv=none; b=alY/mTVqIX3bgZoYiBsKEdd/SAOQpH1J6YMmDbELLndsykn2+iiqtKKxcQZUZ6u2Nfkb/LDn9JFD4QtYIiMVOGzfpJdW7Qs8aMDA+oyyEpYtdQd7vqoZFZ/oK1OQPzExWGFSca5wtZcHpYXesE2pmkrfaOmcClt2dw1B/zXJ4hY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762328186; c=relaxed/simple; bh=l4sVPfT+IHVIjHAg6mRjsZ6J0HkKBQLQ79pRWfzDNsg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Z807Kk4aZpQ9jpQzlXKDOaYxFzDnJSjTPjI35dWlmNFGkGR1xGnSJoC0N1gcRNcfOxMG6BnpRYMLfR/k4gfzMm1vlmeKXNSvWt8I5WrKiFeSP/qK7XGeDonCJtZK74QHAQ90GZjn75C+gAugP7RTdyjJFmgOfGya2bUAXzAnAEw= 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=QProqwgx; arc=none smtp.client-ip=91.218.175.189 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="QProqwgx" Date: Wed, 5 Nov 2025 09:36:16 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1762328183; 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=esXwrIIJ/OfQVqm08M7Pt7VI1MokoOkiScr/2XSUa0U=; b=QProqwgxNjFX8FInVaKiL9gtAoMneHImlBqks/StpSDTaiWJjS+MVjhpUWIWPJtpHBFvhv Awe3Amw95ydMg/bHUSCog7o6q+N73fEpG/EZFqQuQXVI0ztiHt1Qgy4TbvcxSMF4CoRkL7 v04md90iCbYkzzQE31QgbJbdJsFrPUo= 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 v3 02/16] dt-bindings: battery: Clarify trickle-charge Message-ID: <742fcdcc8b6dcb5989418e8c1cf5a7d7ba5434a5.1762327887.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="I3TnsRBe02/VN2xi" Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT --I3TnsRBe02/VN2xi 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: 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 2.51.0 --I3TnsRBe02/VN2xi Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEIx+f8wZb28fLKEhTeFA3/03aocUFAmkK/nAACgkQeFA3/03a ocUMIAf+NCseED7kwNbN9UuGodeOWqZ1MLgfMqLBUlOUc7XyZ51vUagUd4WDOIOR do4YBR0Fg/uoDT3mJBj5UVJq4TffQsOqyU1jaWCqSNYBwer9Jvz6AfVuOOzJJefi qTsLO+90cnMMDhfnEfFH1k7iTcxe9yS4l9D9cXtVrOS5i+Ui8Kp4bFaxKfAN7C+A 6OeoIRR5ycRzlnEiZtOwfwAXYWbLmmHLpmHG1HEhsv5/FFdqAI2bd9OXFqWPwwdD XXHF0+bgQpjIatqk8lPwFR+OufIlWyXHPn9kttT6OZ6NCwcFpQTPf73xhBWWW9vm Rfl35j180jsh42CNn8IhlNsa4If8TA== =Xtmc -----END PGP SIGNATURE----- --I3TnsRBe02/VN2xi--