18c2ecf20Sopenharmony_ciWhat: /sys/class/fpga_region/<region>/compat_id 28c2ecf20Sopenharmony_ciDate: June 2018 38c2ecf20Sopenharmony_ciKernelVersion: 4.19 48c2ecf20Sopenharmony_ciContact: Wu Hao <hao.wu@intel.com> 58c2ecf20Sopenharmony_ciDescription: FPGA region id for compatibility check, e.g. compatibility 68c2ecf20Sopenharmony_ci of the FPGA reconfiguration hardware and image. This value 78c2ecf20Sopenharmony_ci is defined or calculated by the layer that is creating the 88c2ecf20Sopenharmony_ci FPGA region. This interface returns the compat_id value or 98c2ecf20Sopenharmony_ci just error code -ENOENT in case compat_id is not used. 10