Re: [PATCH 00/10] Add RT5033 charger device driver

[Jakob Hauser]

Hi Pavel,

On 25.03.23 17:08, Pavel Machek wrote:
> Hi!

...

> > - The third option of the rt5033 chip is enabling charging termination. This
> >    also enables a re-charge cycle. When the charging current sinks below the
> >    end-of-charge current, the chip stops charging. The sysfs state changes to
> >    "not charging". When the voltage gets 0.1 V below the end-of-charge constant
> >    voltage, re-charging starts. Then again, when charging current sinks below
> >    the end-of-charge current, the chip stops charging. And so on, going up and
> >    down in re-charge cycles. In case the power consumption is high (e.g. tuning
> >    on the display of the mobile device), the current goes into an equilibrium.
> >    The downside of this charging termination option: When reaching the end-of-
> >    charge current, the capacity might not have reached 100 % yet. The capacity
> >    to reach probably depends on power consumption and battery wear. On my mobile
> >    device, capacity reaches 98 %, drops to 96 % until re-charging kicks in,
> >    climbs to 98 %, drops to 96 %, and so on. Not reaching 100 % is a bit
> >    confusing to the user, too.
>
> Is the system powered from the battery in the not-charging case?

Yes, at RT5033 in the "not charging" state the system draws the power 
from the battery.

...

Kind regards,
Jakob