- sync usage() and SYNOPSIS

- document "flag", for I2C devices
- "pin" is not optional

ok matthieu

1 files changed, 24 insertions, 22 deletions

diff --git a/usr.sbin/gpioctl/gpioctl.8 b/usr.sbin/gpioctl/gpioctl.8
index 7c3dafd4085..0f3fc0cac55 100644
--- a/usr.sbin/gpioctl/gpioctl.8
+++ b/usr.sbin/gpioctl/gpioctl.8
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: gpioctl.8,v 1.20 2011/10/03 20:24:51 matthieu Exp $
+.\"	$OpenBSD: gpioctl.8,v 1.21 2011/10/04 07:19:13 jmc Exp $
 .\"
 .\" Copyright (c) 2004 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: October 3 2011 $
+.Dd $Mdocdate: October 4 2011 $
 .Dt GPIOCTL 8
 .Os
 .Sh NAME
@@ -24,38 +24,33 @@
 .Nm gpioctl
 .Op Fl q
 .Ar device
-attach
-.Ar device
-.Ar offset
-.Ar mask
-.Op Ar flag
-.Nm gpioctl
-.Op Fl q
-.Ar device
-detach
-.Ar device
+.Ar pin
+.Op Ar 0 | 1 | 2 | on | off | toggle
 .Nm gpioctl
 .Op Fl q
 .Ar device
 .Ar pin
-.Op Ar 0 | 1 | 2
+set
+.Op Ar flags
+.Op Ar name
 .Nm gpioctl
 .Op Fl q
 .Ar device
 .Ar pin
-.Op Ar on | off | toggle
+unset
 .Nm gpioctl
 .Op Fl q
 .Ar device
-.Ar pin
-set
-.Op Ar flags
-.Op Ar name
+attach
+.Ar device
+.Ar offset
+.Ar mask
+.Op Ar flag
 .Nm gpioctl
 .Op Fl q
 .Ar device
-.Ar pin
-unset
+detach
+.Ar device
 .Sh DESCRIPTION
 The
 .Nm
@@ -114,7 +109,8 @@ command.
 .Pp
 The following configuration
 .Ar flags
-are supported by the GPIO framework:
+are supported by the GPIO framework.
+Note that not all the flags can be supported by the particular GPIO controller.
 .Pp
 .Bl -tag -width Ds -offset indent -compact
 .It in
@@ -139,7 +135,13 @@ invert input
 invert output
 .El
 .Pp
-Note that not all the flags can be supported by the particular GPIO controller.
+When attaching an I2C device,
+if the
+.Ar flag
+argument is set to 0x01,
+the order of the SDA and SCL signals is reversed
+(see
+.Xr gpioiic 4 ) .
 .Pp
 When executed with only the
 .Xr gpio 4