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1What: /sys/class/fpga_region/<region>/compat_id2Date: June 20183KernelVersion: 4.194Contact: Wu Hao <hao.wu@intel.com>5Description: FPGA region id for compatibility check, e.g. compatibility6 of the FPGA reconfiguration hardware and image. This value7 is defined or calculated by the layer that is creating the8 FPGA region. This interface returns the compat_id value or9 just error code -ENOENT in case compat_id is not used.10