Re: [PATCH v2 02/15] dt-bindings: Add trickle-charge upper limit

[Linus Walleij]

On Wed, Oct 29, 2025 at 7:22 AM Matti Vaittinen
<mazziesaccount@xxxxxxxxx> wrote:

> > But I believe this is wrong. Trickle charging does not switch to
> > anything more, there is no fast charging after trickle. You have some
> > sort of pre-pre-charging, which is just pre-charging.
>
> There is trickle, pre and fast-charge phases. Furthermore, the
> fast-charge is further divided to CC and CV. Finally, if my memory
> serves me well, Linus W did explain me that some chargers use
> 'trickle-charging' as a _last_ charging phase for a full battery. Thus
> the term 'trickle-charging' is slightly confusing - but it is already
> used by the existing bindings...
>
> https://lore.kernel.org/all/20211116001755.2132036-1-linus.walleij@xxxxxxxxxx/

I think we need to refer to a textbook or IEEE articles to get this
terminology right.

As you say it appears "trickle-charging" is ambiguous.

Maybe what Krzysztof suggest to use: "pre-pre-charging" or
"empty-battery-charging" or something like this is needed.

But we really need a trustworthy academic source here.

Yours,
Linus Walleij