Hi,
On Sun, May 03, 2020 at 01:11:58AM +0200, Michał Mirosław wrote:
> On Sun, May 03, 2020 at 12:45:26AM +0200, Michał Mirosław wrote:
> > On Sun, May 03, 2020 at 12:23:49AM +0200, Sebastian Reichel wrote:
> > > On Fri, May 01, 2020 at 05:11:18PM +0200, Michał Mirosław wrote:
> [...]
> > > > --- a/include/linux/power_supply.h
> > > > +++ b/include/linux/power_supply.h
> > > > @@ -127,7 +127,9 @@ enum power_supply_property {
> > > > POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
> > > > POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD, /* in
> > > > percents! */
> > > > POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD, /* in percents!
> > > > */
> > > > + POWER_SUPPLY_PROP_INPUT_CURRENT_NOW,
> > >
> > > What: /sys/class/power_supply/<supply_name>/current_avg
> > > Date: May 2007
> > > Contact: [email protected]
> > > Description:
> > > Reports an average IBUS current reading over a fixed
> > > period.
> > > Normally devices will provide a fixed interval in which
> > > they
> > > average readings to smooth out the reported value.
> > >
> > >
> > >
> > > Access: Read
> > > Valid values: Represented in microamps
> > >
> >
> > There are two entries for /sys/class/power_supply/<supply_name>/current_avg
> > in the file, the other one mentions IBAT instead. "voltage_now" has the
> > same problem.
> [...]
>
> So the general idea of the sysfs API seems to require separate devices for the
> input (charger) and battery elements.
>
> Since what I'm looking at is an integrated battery controller
> (bq25896) which has three connections: an USB power (VBUS), a
> battery and the system load, but it creates only a single
> power-class device.power-supply exposes either TYPE_MAINS/TYPE_USB or TYPE_BATTERY. If a device is combined function, then it should register two power-supply devices. > This is complicated by the fact that this is an OTG device and so > it can sink or source VBUS power. Ok. -- Sebastian
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