1*a3ebb524SRobert Mustacchi.\" 2*a3ebb524SRobert Mustacchi.\" This file and its contents are supplied under the terms of the 3*a3ebb524SRobert Mustacchi.\" Common Development and Distribution License ("CDDL"), version 1.0. 4*a3ebb524SRobert Mustacchi.\" You may only use this file in accordance with the terms of version 5*a3ebb524SRobert Mustacchi.\" 1.0 of the CDDL. 6*a3ebb524SRobert Mustacchi.\" 7*a3ebb524SRobert Mustacchi.\" A full copy of the text of the CDDL should have accompanied this 8*a3ebb524SRobert Mustacchi.\" source. A copy of the CDDL is also available via the Internet at 9*a3ebb524SRobert Mustacchi.\" http://www.illumos.org/license/CDDL. 10*a3ebb524SRobert Mustacchi.\" 11*a3ebb524SRobert Mustacchi.\" 12*a3ebb524SRobert Mustacchi.\" Copyright 2025 Oxide Computer Company 13*a3ebb524SRobert Mustacchi.\" 14*a3ebb524SRobert Mustacchi.Dd October 4, 2025 15*a3ebb524SRobert Mustacchi.Dt PCA954X 4D 16*a3ebb524SRobert Mustacchi.Os 17*a3ebb524SRobert Mustacchi.Sh NAME 18*a3ebb524SRobert Mustacchi.Nm pca954x 19*a3ebb524SRobert Mustacchi.Nd PCA 954X series I2C mux driver 20*a3ebb524SRobert Mustacchi.Sh DESCRIPTION 21*a3ebb524SRobert MustacchiThe 22*a3ebb524SRobert Mustacchi.Nm 23*a3ebb524SRobert Mustacchidriver provides support for the PCA 954X series I2C switches and multiplexors. 24*a3ebb524SRobert MustacchiInstances of 25*a3ebb524SRobert Mustacchi.Nm 26*a3ebb524SRobert Mustacchiare part of the system's I2C framework and not manipulated directly, but 27*a3ebb524SRobert Mustacchiare visible with 28*a3ebb524SRobert Mustacchi.Xr i2cadm 8 . 29*a3ebb524SRobert Mustacchi.Pp 30*a3ebb524SRobert MustacchiThe following devices are currently supported by the driver: 31*a3ebb524SRobert Mustacchi.Bl -bullet 32*a3ebb524SRobert Mustacchi.It 33*a3ebb524SRobert MustacchiPCA9543 -- 2 port switch 34*a3ebb524SRobert Mustacchi.It 35*a3ebb524SRobert MustacchiPCA9545 -- 4 port switch 36*a3ebb524SRobert Mustacchi.It 37*a3ebb524SRobert MustacchiPCA9546 -- 4 port switch 38*a3ebb524SRobert Mustacchi.It 39*a3ebb524SRobert MustacchiPCA9548 -- 8 port switch 40*a3ebb524SRobert Mustacchi.It 41*a3ebb524SRobert MustacchiPCA9846 -- 4 port switch 42*a3ebb524SRobert Mustacchi.It 43*a3ebb524SRobert MustacchiPCA9848 -- 8 port switch 44*a3ebb524SRobert Mustacchi.El 45*a3ebb524SRobert Mustacchi.Sh FILES 46*a3ebb524SRobert Mustacchi.Bl -tag -width Pa 47*a3ebb524SRobert Mustacchi.It Pa /kernel/drv/amd64/pca954x 48*a3ebb524SRobert MustacchiDevice driver (x86) 49*a3ebb524SRobert Mustacchi.El 50*a3ebb524SRobert Mustacchi.Sh SEE ALSO 51*a3ebb524SRobert Mustacchi.Xr i2cadm 8 52