* Hans de Goede <hdego...@redhat.com> [170815 13:06]: > On some devices the USB Type-C port power (USB PD 2.0) negotiation is > done by a separate port-controller IC, while the current limit is > controlled through another (charger) IC. > > It has been decided to model this by modelling the external Type-C > power brick (adapter/charger) as a power-supply class device which > supplies the charger-IC, with its voltage-now and current-max representing > the negotiated voltage and max current draw. > > This commit adds a power_supply_set_input_current_limit_from_supplier > helper function which charger power-supply drivers can call to get > the max-current from their supplier and have this applied > through their set_property call-back to their input-current-limit.
Hmm so can this also be used for the USB gadget subsystem to tell charge controller when it's OK to enable 500mA charging after enumeration? FYI, that's controlled by the bq24190 pin named OTG that should be only set high after enumeration. Any ideas how that is wired on your device? Does it connect to the USB PHY or to a GPIO line? Regards, Tony
