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Index: head/usr.sbin/pwm/pwm.8
===================================================================
--- head/usr.sbin/pwm/pwm.8
+++ head/usr.sbin/pwm/pwm.8
@@ -22,7 +22,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd November 12, 2018
+.Dd January 12, 2019
.Dt PWM 8
.Os
.Sh NAME
@@ -44,20 +44,25 @@
.Nm
.Op Fl f Ar device
.Fl c Ar channel
-.Fl p period
+.Fl p Ar period
.Nm
.Op Fl f Ar device
.Fl c Ar channel
-.Fl d duty
+.Fl d Ar duty
.Sh DESCRIPTION
The
.Nm
utility can be used to configure pwm controllers.
.Pp
The options are as follow:
-.Bl -tag -width ".Fl f Ar device"
+.Bl -tag -width "-c channel"
.It Fl c Ar channel
Channel number to operate on
+.It Fl f Ar device
+Device to operate on.
+If not specified,
+.Pa /dev/pwmc0
+is used.
.It Fl E
Enable the pwm channel
.It Fl D
@@ -73,16 +78,19 @@
.Bl -bullet
.It
Show the configuration of the pwm channel:
-.Pp
+.Bd -literal
pwm -f /dev/pwmc0 -C
+.Ed
.It
Configure a 50000 ns period and a 25000 duty cycle:
-.Pp
+.Bd -literal
pwm -f /dev/pwmc0 -p 50000 -d 25000
+.Ed
.It
Configure a 50% duty cycle:
-.Pp
+.Bd -literal
pwm -f /dev/pwmc0 -d 50%
+.Ed
.El
.Sh SEE ALSO
.Xr pwm 9 ,

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