These files allow sending arbitrary IPC commands to the PMC/SCU which may be dangerous. These will be removed eventually and should not be used in any new applications. What: /sys/bus/platform/devices/INT34D2:00/simplecmd Date: Jun 2015 KernelVersion: 4.1 Contact: Mika Westerberg <mika.westerberg@linux.intel.com> Description: This interface allows userspace to send an arbitrary IPC command to the PMC/SCU. Format: %d %d where first number is command and second number is subcommand. What: /sys/bus/platform/devices/INT34D2:00/northpeak Date: Jun 2015 KernelVersion: 4.1 Contact: Mika Westerberg <mika.westerberg@linux.intel.com> Description: This interface allows userspace to enable and disable Northpeak through the PMC/SCU. Format: %u.