diff options
Diffstat (limited to 'share/man/man4/gpioow.4')
| -rw-r--r-- | share/man/man4/gpioow.4 | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/share/man/man4/gpioow.4 b/share/man/man4/gpioow.4 index d31dc044a21..b9e833cf074 100644 --- a/share/man/man4/gpioow.4 +++ b/share/man/man4/gpioow.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: gpioow.4,v 1.4 2007/05/31 19:19:50 jmc Exp $ +.\" $OpenBSD: gpioow.4,v 1.5 2008/11/24 14:17:57 mbalmer Exp $ .\" .\" Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org> .\" @@ -14,7 +14,7 @@ .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" -.Dd $Mdocdate: May 31 2007 $ +.Dd $Mdocdate: November 24 2008 $ .Dt GPIOOW 4 .Os .Sh NAME @@ -22,6 +22,7 @@ .Nd 1-Wire bus bit-banging through GPIO pin .Sh SYNOPSIS .Cd "gpioow* at gpio? offset 0 mask 0x1" +.Cd "gpioow* at gpio?" .Cd "onewire* at gpioow?" .Sh DESCRIPTION The @@ -30,12 +31,24 @@ driver allows bit-banging a 1-Wire bus as a master using one GPIO pin. The pin is used as a data signal. The GPIO pin must be able to drive an output and read an input. .Pp -The pin number is specified in the kernel configuration with the +The pin number can specified in the kernel configuration with the .Ar offset locator. The .Ar mask -locator should always be 0x1. +locator should always be 0x1 in this case. +The +.Ar offset +and +.Ar mask +can also be specified when +.Nm +is attached at runtime using the +.Ar GPIOATTACH +.Xr ioctl 2 +on the +.Xr gpio 4 +device. .Sh SEE ALSO .Xr gpio 4 , .Xr intro 4 , |