Index: sbin/nvmecontrol/nvmecontrol.8
===================================================================
--- sbin/nvmecontrol/nvmecontrol.8
+++ sbin/nvmecontrol/nvmecontrol.8
@@ -470,6 +470,37 @@
 mode.
 This will report status on a sanitize that is already running on the drive.
 .El
+.Ss power
+Manage the power modes in the system.
+.Bl -tag -width 6n
+.It Fl l
+List all the power modes in the system.
+.It Fl p Ar mode
+Set the power mode to
+.Ar mode .
+This must be a mode listed with the
+.Dl nvmecontrol power -l
+command.
+.It Fl w Ar hint
+Set the workload hint for automatic power mode control.
+.Bl -tag -compact -width 6n
+.It 0
+No workload hint is provided.
+.It 1
+Extended idle period workload.
+The device is often idle for minutes at a time.
+A burst of write commands comes in over a period of seconds.
+Then the device returns to being idle.
+.It 2
+Heavy sequential writes.
+A huge number of sequential writes will be submitted, filling the submission queues.
+.It Other
+All other values are reserved and have no standard meaning.
+.El
+Please see the NVMe Standard section 8.4.3
+.Dq NVM Sybsystem Workloads
+for details.
+.El
 .Ss selftest
 Start the specified device self-test:
 .Bl -tag -width 6n