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+What: /sys/bus/iio/devices/iio:deviceX/in_proximity<id>_setup
+Date: November 2021
+KernelVersion: 5.17
+Contact: Gwendal Grignou <gwendal@chromium.org>
+Description:
+ SX9324 has 3 inputs, CS0, CS1 and CS2. Hardware layout
+ defines if the input is
+
+ + not connected (HZ),
+ + grounded (GD),
+ + connected to an antenna where it can act as a base
+ (DS - data shield), or measured input (MI).
+
+ The sensor rotates measurement across 4 phases
+ (PH0, PH1, PH2, PH3), where the inputs are configured
+ and then measured.
+
+ By default, during the first phase, [PH0], CS0 is measured,
+ while CS1 and CS2 are used as shields.
+ `cat in_proximity0_setup` returns "MI,DS,DS".
+ [PH1], CS1 is measured, CS0 and CS2 are shield:
+ `cat in_proximity1_setup` returns "DS,MI,DS".
+ [PH2], CS2 is measured, CS0 and CS1 are shield:
+ `cat in_proximity1_setup` returns "DS,DS,MI".
+ [PH3], CS1 and CS2 are measured (combo mode):
+ `cat in_proximity1_setup` returns "DS,MI,MI".
+
+ Note, these are the chip default. Hardware layout will most
+ likely dictate different output. The entry is read-only.