Re: [PATCH v7 5/6] power: supply: pf1550: add battery charger support

Samuel Kayode
2025-07-07T15:19:25Z

On Mon, Jul 07, 2025 at 01:33:36AM +0200, Sebastian Reichel wrote:
> Hello Samuel,
>
> On Wed, Jun 25, 2025 at 10:19:49AM -0400, Samuel Kayode wrote:
> > The pf1550 charger receives a VBUS power input which can be provided either by
> > an AC adapter or a USB bus. A depleted battery is charged using the VBUS power
> > input (VBUSIN). When no power is supplied to VBUSIN, the pf1550 switches the
> > load to the connected non-depleted battery.
> >
> > I could have two power_supply_desc, one for battery and one for the external
> > power?
>
> That's acceptable. But don't you have a fuel-gauge for the battery?
> If you register two POWER_SUPPLY_TYPE_BATTERY devices, then your
> board should have two batteries. If you have a fuel-gauge it will
> very likely provide much better battery data then anything you get
> out of pf1550.

The PMIC unfortunately does not include a fuel-gauge.

I intend on having POWER_SUPPLY_TYPE_MAINS for the external power supply
(AC adapter or USB bus) and POWER_SUPPLY_TYPE_BATTERY for the battery.

Thanks,
Sam