0001 What: /sys/bus/i2c/.../idle_state
0002 Date: January 2019
0003 KernelVersion: 5.2
0004 Contact: Robert Shearman <robert.shearman@att.com>
0005 Description:
0006 Value that exists only for mux devices that can be
0007 written to control the behaviour of the multiplexer on
0008 idle. Possible values:
0009
0010 =========== ===============================================
0011 -2 disconnect on idle, i.e. deselect the last used
0012 channel, which is useful when there is a device
0013 with an address that conflicts with another
0014 device on another mux on the same parent bus.
0015 -1 leave the mux as-is, which is the most optimal
0016 setting in terms of I2C operations and is the
0017 default mode.
0018 0..<nchans> set the mux to a predetermined channel,
0019 which is useful if there is one channel that is
0020 used almost always, and you want to reduce the
0021 latency for normal operations after rare
0022 transactions on other channels
0023 =========== ===============================================
