Return to pcamux.4 CVS log

Up to [local] / src / share / man / man4

Add support for the PCA9547 I2C mux to pcamux(4).  In comparison to
the PCA954[68], this is a mux instead of a switch and can only have
one active channel at a time.  On the bright side, we treat switches
like a mux, so only the bits have to be set a little bit differently.

ok kettenis@

.\"	$OpenBSD: pcamux.4,v 1.4 2020/11/13 10:14:53 patrick Exp $
.\"
.\" Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: November 13 2020 $
.Dt PCAMUX 4
.Os
.Sh NAME
.Nm pcamux
.Nd Philips PCA954[678] I2C switch/mux
.Sh SYNOPSIS
.Cd "pcamux* at iic?"
.Cd "iic* at pcamux?"
.Sh DESCRIPTION
The
.Nm
driver provides support for the Philips PCA954[68] I2C switch
and Philips PCA9547 I2C mux, which is used with the
.Xr iic 4
framework.
.Sh SEE ALSO
.Xr iic 4 ,
.Xr intro 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 6.8 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Mark Kettenis Aq Mt kettenis@openbsd.org .