1.\" Copyright (c) 2013, Luiz Otavio O Souza <loos@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd November 5, 2013 28.Dt GPIOLED 4 29.Os 30.Sh NAME 31.Nm gpioled 32.Nd GPIO led generic device driver 33.Sh SYNOPSIS 34.Cd "device gpio" 35.Cd "device gpioled" 36.Pp 37This driver attaches a 38.Xr led 4 39device to a GPIO pin. 40.Sh DESCRIPTION 41The 42.Em gpioled 43driver provides a glue to attach a 44.Xr led 4 45compatible device to a GPIO pin. 46Each led on the system has a 47.Pa name 48which is used to export a device in 49.Pa /dev/led/<name> . 50The GPIO pin can then be controlled by writing to this device as described 51on 52.Xr led 4 . 53.Pp 54On a hint based system, like 55.Li MIPS , these values are configureable for 56.Nm : 57.Bl -tag -width ".Va hint.gpioiic.%d.atXXX" 58.It Va hint.gpioled.%d.at 59The gpiobus you are attaching to. 60Normally assigned to gpiobus0. 61.It Va hint.gpioled.%d.name 62Arbitrary name of device in 63.Pa /dev/led/ 64to create for 65.Xr led 4 . 66.It Va hint.gpioled.%d.pins 67Which pin on the GPIO interface to map to this instance. 68Please note that this mask should only ever have one bit set 69(any others bits - i.e., pins - will be ignored). 70.El 71.Sh SEE ALSO 72.Xr gpio 4 , 73.Xr led 4 , 74.Xr gpioiic 4 75.Sh HISTORY 76The 77.Nm 78manual page first appeared in 79.Fx 11.0 . 80.Sh AUTHORS 81This 82manual page was written by 83.An Luiz Otavio O Souza . 84