Why I can’t see /sys/class/fpga-bridge/lwhps2fpag folder with my Linux in a A10 SoC kit? - Why I can’t see /sys/class/fpga-bridge/lwhps2fpag folder with my Linux in a A10 SoC kit? Description You can run below commands to enable or disable bridges which are available in your SoC platform. echo 1 > /sys/class/fpga-bridge/fpga2hps/enable echo 1 > /sys/class/fpga-bridge/hps2fpga/enable echo 1 > /sys/class/fpga-bridge/lwhps2fpga/enable If you failed to find those folders, please check the DTS you are using to make sure below nodes are available: fpgabridge0: fpgabridge@0 { compatible = "altr,socfpga-hps2fpga-bridge"; /* appended from boardinfo */ label = "hps2fpga"; /* appended from boardinfo */ reset-names = "hps2fpga"; /* appended from boardinfo */ clocks = <&l4_main_clk>; /* appended from boardinfo */ resets = <&hps_0_rstmgr 96>; /* appended from boardinfo */ }; //end fpgabridge@0 (fpgabridge0) fpgabridge1: fpgabridge@1 { compatible = "altr,socfpga-lwhps2fpga-bridge"; /* appended from boardinfo */ label = "lwhps2fpga"; /* appended from boardinfo */ reset-names = "lwhps2fpga"; /* appended from boardinfo */ clocks = <&l4_main_clk>; /* appended from boardinfo */ resets = <&hps_0_rstmgr 97>; /* appended from boardinfo */ }; //end fpgabridge@1 (fpgabridge1) fpgabridge2: fpgabridge@2 { compatible = "altr,socfpga-fpga2hps-bridge"; /* appended from boardinfo */ label = "fpga2hps"; /* appended from boardinfo */ reset-names = "fpga2hps"; /* appended from boardinfo */ clocks = <&l4_main_clk>; /* appended from boardinfo */ resets = <&hps_0_rstmgr 98>; /* appended from boardinfo */ }; //end fpgabridge@2 (fpgabridge2) fpgabridge3: fpgabridge@3 { compatible = "altr,socfpga-fpga2sdram-bridge"; /* appended from boardinfo */ label = "fpga2sdram"; /* appended from boardinfo */ read-ports-mask = <0x0000000f>; /* appended from boardinfo */ write-ports-mask = <0x0000000f>; /* appended from boardinfo */ cmd-ports-mask = <0x00000001>; /* appended from boardinfo */ }; //end fpgabridge@3 (fpgabridge3) Custom Fields values: ['novalue'] Troubleshooting SPR: 490067; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 16.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']