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 6F207F50F; Wed, 29 Oct 2025 06:17:27 +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=1761718647; cv=none; b=MClisvuwDFRMtcBGL7mOasAAEkbNINMX2MsV3vJUzjmmQ73ey8RnbNVQx/0HDmrl2AXbyBT/GJAJq4CfvWFjhgSL98qpeens32LFqAwez7ekF/YMjidohacftA7kyJWqWtC7vndj5MWxQOkwbOPrpHE0ZTSzAWBcqxtoql0D75I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761718647; c=relaxed/simple; bh=zevlYuJVtJmxSv+AqIyuWxXGW6MxwboAX71gP0JuUKk=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=DftSaAEZnCBHdUM40abm8AUxhzO5TguscI/NGRrgqLrmi7sn2eIh3Z2zo6UIPMKmKIPlkvSmNiQt9tLVUMtvGgOckWmOQMvgA+EkBaShuj4vWU8eM4YnY2tXBx0GjM693MPNXOAT+99OE7fvFq5vEUu0eHSQF5Irh5oVhODznj4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fPYf3h62; 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="fPYf3h62" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 183DEC4CEF7; Wed, 29 Oct 2025 06:17:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761718646; bh=zevlYuJVtJmxSv+AqIyuWxXGW6MxwboAX71gP0JuUKk=; h=Date:Subject:From:To:Cc:References:In-Reply-To:From; b=fPYf3h62SwTnTOGmE0GMx3saPu0+iHyq/eonH5cEmcFhBMkHv+fjut/T130sFDBk4 Az1v75fxjFLiBp3pw5e+WY2IYTu7Zk0zLHtg9Phr6WPlegaqK0d+qp0QpYb+e2L1F2 JS8/xYZ3l1WnQF7jBUXhEvyKRaa1HrjNRZc7Blpvy3nc1hYYbNOWAbZj60D+WgiZmq HITVF9BGgMv+yaCxVGJXfapYaefEevKmm8S0p0yJlF0Wz6Dou6Rlc8JcbKQAuu2tnA wNnMg4PR1mm7SM4cAHRl9N6YgCSFVjTF56xItkoA2YtXgusdWS7+D1h0yEBRMqjR9a D2g3VsRzOeDMg== Message-ID: Date: Wed, 29 Oct 2025 07:17:20 +0100 Precedence: bulk X-Mailing-List: linux-rtc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 02/15] dt-bindings: Add trickle-charge upper limit From: Krzysztof Kozlowski To: Matti Vaittinen Cc: Matti Vaittinen , Lee Jones , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sebastian Reichel , Liam Girdwood , Mark Brown , Michael Turquette , Stephen Boyd , Linus Walleij , Bartosz Golaszewski , Andreas Kemnade , 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 References: <20251029-adamant-mamba-of-patience-cddb65@kuoka> Content-Language: en-US Autocrypt: addr=krzk@kernel.org; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzSVLcnp5c3p0b2Yg S296bG93c2tpIDxrcnprQGtlcm5lbC5vcmc+wsGVBBMBCgA/AhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgBYhBJvQfg4MUfjVlne3VBuTQ307QWKbBQJoF1BKBQkWlnSaAAoJEBuTQ307 QWKbHukP/3t4tRp/bvDnxJfmNdNVn0gv9ep3L39IntPalBFwRKytqeQkzAju0whYWg+R/rwp +r2I1Fzwt7+PTjsnMFlh1AZxGDmP5MFkzVsMnfX1lGiXhYSOMP97XL6R1QSXxaWOpGNCDaUl ajorB0lJDcC0q3xAdwzRConxYVhlgmTrRiD8oLlSCD5baEAt5Zw17UTNDnDGmZQKR0fqLpWy 786Lm5OScb7DjEgcA2PRm17st4UQ1kF0rQHokVaotxRM74PPDB8bCsunlghJl1DRK9s1aSuN hL1Pv9VD8b4dFNvCo7b4hfAANPU67W40AaaGZ3UAfmw+1MYyo4QuAZGKzaP2ukbdCD/DYnqi tJy88XqWtyb4UQWKNoQqGKzlYXdKsldYqrLHGoMvj1UN9XcRtXHST/IaLn72o7j7/h/Ac5EL 8lSUVIG4TYn59NyxxAXa07Wi6zjVL1U11fTnFmE29ALYQEXKBI3KUO1A3p4sQWzU7uRmbuxn naUmm8RbpMcOfa9JjlXCLmQ5IP7Rr5tYZUCkZz08LIfF8UMXwH7OOEX87Y++EkAB+pzKZNNd hwoXulTAgjSy+OiaLtuCys9VdXLZ3Zy314azaCU3BoWgaMV0eAW/+gprWMXQM1lrlzvwlD/k whyy9wGf0AEPpLssLVt9VVxNjo6BIkt6d1pMg6mHsUEVzsFNBFVDXDQBEADNkrQYSREUL4D3 Gws46JEoZ9HEQOKtkrwjrzlw/tCmqVzERRPvz2Xg8n7+HRCrgqnodIYoUh5WsU84N03KlLue MNsWLJBvBaubYN4JuJIdRr4dS4oyF1/fQAQPHh8Thpiz0SAZFx6iWKB7Qrz3OrGCjTPcW6ei OMheesVS5hxietSmlin+SilmIAPZHx7n242u6kdHOh+/SyLImKn/dh9RzatVpUKbv34eP1wA GldWsRxbf3WP9pFNObSzI/Bo3kA89Xx2rO2roC+Gq4LeHvo7ptzcLcrqaHUAcZ3CgFG88CnA 6z6lBZn0WyewEcPOPdcUB2Q7D/NiUY+HDiV99rAYPJztjeTrBSTnHeSBPb+qn5ZZGQwIdUW9 YegxWKvXXHTwB5eMzo/RB6vffwqcnHDoe0q7VgzRRZJwpi6aMIXLfeWZ5Wrwaw2zldFuO4Dt 91pFzBSOIpeMtfgb/Pfe/a1WJ/GgaIRIBE+NUqckM+3zJHGmVPqJP/h2Iwv6nw8U+7Yyl6gU BLHFTg2hYnLFJI4Xjg+AX1hHFVKmvl3VBHIsBv0oDcsQWXqY+NaFahT0lRPjYtrTa1v3tem/ JoFzZ4B0p27K+qQCF2R96hVvuEyjzBmdq2esyE6zIqftdo4MOJho8uctOiWbwNNq2U9pPWmu 4vXVFBYIGmpyNPYzRm0QPwARAQABwsF8BBgBCgAmAhsMFiEEm9B+DgxR+NWWd7dUG5NDfTtB YpsFAmgXUF8FCRaWWyoACgkQG5NDfTtBYptO0w//dlXJs5/42hAXKsk+PDg3wyEFb4NpyA1v qmx7SfAzk9Hf6lWwU1O6AbqNMbh6PjEwadKUk1m04S7EjdQLsj/MBSgoQtCT3MDmWUUtHZd5 RYIPnPq3WVB47GtuO6/u375tsxhtf7vt95QSYJwCB+ZUgo4T+FV4hquZ4AsRkbgavtIzQisg Dgv76tnEv3YHV8Jn9mi/Bu0FURF+5kpdMfgo1sq6RXNQ//TVf8yFgRtTUdXxW/qHjlYURrm2 H4kutobVEIxiyu6m05q3e9eZB/TaMMNVORx+1kM3j7f0rwtEYUFzY1ygQfpcMDPl7pRYoJjB dSsm0ZuzDaCwaxg2t8hqQJBzJCezTOIkjHUsWAK+tEbU4Z4SnNpCyM3fBqsgYdJxjyC/tWVT AQ18NRLtPw7tK1rdcwCl0GFQHwSwk5pDpz1NH40e6lU+NcXSeiqkDDRkHlftKPV/dV+lQXiu jWt87ecuHlpL3uuQ0ZZNWqHgZoQLXoqC2ZV5KrtKWb/jyiFX/sxSrodALf0zf+tfHv0FZWT2 zHjUqd0t4njD/UOsuIMOQn4Ig0SdivYPfZukb5cdasKJukG1NOpbW7yRNivaCnfZz6dTawXw XRIV/KDsHQiyVxKvN73bThKhONkcX2LWuD928tAR6XMM2G5ovxLe09vuOzzfTWQDsm++9UKF a/A= In-Reply-To: <20251029-adamant-mamba-of-patience-cddb65@kuoka> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 29/10/2025 07:03, Krzysztof Kozlowski wrote: > On Mon, Oct 27, 2025 at 01:45:05PM +0200, Matti Vaittinen wrote: >> Some of the chargers for lithium-ion batteries use a trickle-charging as >> a first charging phase for very empty batteries, to "wake-up" the battery. > > In the few cases I was dealing with charging circuits, trickle charging > was used in context of top-off charging, so when battery is 100%. It's > also documented at Wiki like that: > https://en.wikipedia.org/wiki/Trickle_charging > >> Trickle-charging is a low current, constant current phase. After the >> voltage of the very empty battery has reached an upper limit for >> trickle charging, the pre-charge phase is started with a higher current. >> >> Allow defining the upper limit for trickle charging voltage, after which >> the charging should be changed to the pre-charging. > > pre-charging is the trickle charging, no? Or you want to say that > trickle-charging is pre-pre-charging? But then what is pre-charging in > this binding? Now I see that you added initial trickle-charging in commit e3420b49949c79d6182dd8128fa7a3958da01b07. I looked at TI chargers for LiIon/LiPo batteries and few popular models use the same meaning/cycles as you here. Probably in LiIon/LiPo you cannot or should not use trickle for top-off charging (CV phase). For NiMh these TI chargers use term "Trickle Maintenance Charge" (e.g. bq24400), so in separate or this patch please also clarify the description of properties that this is trickle-charging for LiIon/LiPo batteries, so the pre-pre charging. Best regards, Krzysztof