Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

• bus_type : hid_device_info
• interface_number : hid_device_info
• major : hid_api_version
• manufacturer_string : hid_device_info
• minor : hid_api_version
• next : hid_device_info
• patch : hid_api_version
• path : hid_device_info
• product_id : hid_device_info
• product_string : hid_device_info
• release_number : hid_device_info
• serial_number : hid_device_info
• usage : hid_device_info
• usage_page : hid_device_info
• vendor_id : hid_device_info