Host controller interface for universal serial bus (usb) power delivery

An apparatus, comprising:

• a power bus interface configured to communicate with a universal serial bus (USB) port partner;
• a system management bus interface configured to communicate with a host;
• and
• a processor coupled to the power bus interface and the system management bus interface, wherein the processor is configured to:
• receive, via the system management bus interface, a power delivery configuration from the host, wherein the power delivery configuration comprises voltage and current settings;
• generate a power capability message based on the power delivery configuration;
• and
• send, via the power bus interface, the power capability message to the USB port partner.

A method for interfacing with a Universal Serial Bus (USB) Power Delivery controller (PDC) via a system management bus, wherein the method comprises:

• sending a power delivery configuration to the PDC, wherein the power delivery configuration comprises voltage and current settings;
• sending a power delivery command to the PDC, wherein the power delivery command instructs the PDC to send a first power delivery message to a USB port partner of the PDC;
• sending a power delivery event configuration to the PDC;
• receiving a power delivery event from the PDC;
• and
• receiving a second power delivery message of the USB port partner from the PDC, wherein the second power delivery message comprises a power capability of the USB port partner.