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