diff --git a/share/man/man4/cgem.4 b/share/man/man4/cgem.4
--- a/share/man/man4/cgem.4
+++ b/share/man/man4/cgem.4
@@ -39,13 +39,19 @@
 .Cd "device miibus"
 .Cd "device cgem"
 .Ed
+.Pp
+To load the driver as a module at boot time, place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+if_cgem_load="YES"
+.Ed
 .Sh DESCRIPTION
 The
 .Nm
 driver provides support for the Cadence GEM (Gigabit Ethernet MAC).
 The Cadence GEM is used in some SoC (System on a Chip) devices such as
-the Xilinx Zynq-7000, the Xilinx Zynq UltraScale+, and the SiFive
-HiFive Unleashed.
+the Xilinx Zynq-7000, the Xilinx Zynq UltraScale+, the SiFive
+HiFive Unleashed, and the Microchip PolarFire SoC.
 .Pp
 The
 .Nm
@@ -98,6 +104,14 @@
 The driver provides support for TCP/UDP/IP checksum offloading (although
 disabled by default).
 The device and driver also support 1536-byte frames for VLANs (vlanmtu).
+.Pp
+The
+.Nm
+driver's default MAC to PHY connection type is GMII/RGMII; it is
+possible to use SGMII when declared in the device tree like
+.Bd -literal -offset indent
+phy-mode = "sgmii";
+.Ed
 .Sh SYSCTL VARIABLES
 The following variables are available as both
 .Xr sysctl 8