1What: /sys/class/fpga_region/<region>/compat_id 2Date: June 2018 3KernelVersion: 4.19 4Contact: Wu Hao <hao.wu@intel.com> 5Description: FPGA region id for compatibility check, e.g. compatibility 6 of the FPGA reconfiguration hardware and image. This value 7 is defined or calculated by the layer that is creating the 8 FPGA region. This interface returns the compat_id value or 9 just error code -ENOENT in case compat_id is not used. 10