Hi Greg and Heikki, I can see that ucsi acpi interface driver is available in kernel tree. I have following queries on the same. Kindly pardon my ignorance as i am a novice to this. - Is there any implementation of USB-C system policy manager (OPM) in Linux? - If yes to USB-C system policy, are there any requirements that differ from the published Intel White paper on UCSI support through ACPI Mailbox method? (Link: http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/bios-implementation-of-ucsi.pdf ) Looking forward for your help to understand these queries better. Thanks and Regards Nehal Shah -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html