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Manual Pages  — IICHID

NAME

iichid – I2C HID transport driver

CONTENTS

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file: device iichid

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): 

iichid_load="YES"

DESCRIPTION

The iichid driver provides a interface to I2C Human Interface Devices (HIDs).

SYSCTL VARIABLES

Next parameters are available as sysctl(8) variables. Debug parameter is available as loader(8) tunable as well.
dev.iichid.*.sampling_rate_fast
  Active sampling rate in num/second (for sampling mode).
dev.iichid.*.sampling_rate_slow
  Idle sampling rate in num/second (for sampling mode).
dev.iichid.*.sampling_hysteresis
  Number of missing samples before enabling of slow mode (for sampling mode).
hw.iichid.debug
  Debug output level, where 0 is debugging disabled and larger values increase debug message verbosity. Default is 0.

SEE ALSO

ig4(4)

BUGS

The iichid does not support GPIO interrupts yet. In that case iichid enables sampling mode with periodic polling of hardware by driver means. See dev.iichid.*.sampling_* sysctl(8) variables for tuning of sampling parameters.

HISTORY

The iichid driver first appeared in FreeBSD 13.0.

AUTHORS

The iichid driver was written by Marc Priggemeyer <Mt marc.priggemeyer@gmail.com> and Vladimir Kondratyev <Mt wulf@FreeBSD.org>.

This manual page was written by Vladimir Kondratyev <Mt wulf@FreeBSD.org>.

IICHID (4) September 21, 2020
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