NAME

iichid —

I2C HID transport driver

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.

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(4) 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 <marc.priggemeyer@gmail.com> and Vladimir Kondratyev <wulf@FreeBSD.org>.

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