sysfs-bus-i2c-devices-pca954x 1007 B

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  1. What: /sys/bus/i2c/.../idle_state
  2. Date: January 2019
  3. KernelVersion: 5.2
  4. Contact: Robert Shearman <robert.shearman@att.com>
  5. Description:
  6. Value that exists only for mux devices that can be
  7. written to control the behaviour of the multiplexer on
  8. idle. Possible values:
  9. =========== ===============================================
  10. -2 disconnect on idle, i.e. deselect the last used
  11. channel, which is useful when there is a device
  12. with an address that conflicts with another
  13. device on another mux on the same parent bus.
  14. -1 leave the mux as-is, which is the most optimal
  15. setting in terms of I2C operations and is the
  16. default mode.
  17. 0..<nchans> set the mux to a predetermined channel,
  18. which is useful if there is one channel that is
  19. used almost always, and you want to reduce the
  20. latency for normal operations after rare
  21. transactions on other channels
  22. =========== ===============================================