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1What: /sys/bus/platform/devices/[..]/fsi-master-gpio/external_mode2Date: Feb 20183KernelVersion: 4.174Contact: jk@ozlabs.org5Description:6 Controls access arbitration for GPIO-based FSI master. A7 value of 0 (the default) sets normal mode, where the8 driver performs FSI bus transactions, 1 sets external mode,9 where the FSI bus is driven externally (for example, by10 a debug device).11