diff --git a/sys/dev/fdt/fdt_powerpc.c b/sys/dev/fdt/fdt_powerpc.c
index f408d0a30698..80cfa4b3a93a 100644
--- a/sys/dev/fdt/fdt_powerpc.c
+++ b/sys/dev/fdt/fdt_powerpc.c
@@ -46,7 +46,7 @@ __FBSDID("$FreeBSD$");
 #include "fdt_common.h"
 
 static void
-fdt_fixup_busfreq(phandle_t root)
+fdt_fixup_busfreq(phandle_t root, uint32_t div)
 {
 	phandle_t sb, cpus, child;
 	pcell_t freq;
@@ -72,12 +72,71 @@ fdt_fixup_busfreq(phandle_t root)
 	    sizeof(freq)) <= 0)
 		return;
 
+	if (div == 0)
+		return;
+
+	freq /= div;
+
 	OF_setprop(sb, "bus-frequency", (void *)&freq, sizeof(freq));
 }
 
+static void
+fdt_fixup_busfreq_mpc85xx(phandle_t root)
+{
+
+	fdt_fixup_busfreq(root, 1);
+}
+
+static void
+fdt_fixup_busfreq_dpaa(phandle_t root)
+{
+
+	fdt_fixup_busfreq(root, 2);
+}
+
+static void
+fdt_fixup_fman(phandle_t root)
+{
+	phandle_t node;
+	pcell_t freq;
+
+	if ((node = fdt_find_compatible(root, "simple-bus", 1)) == 0)
+		return;
+
+	if (OF_getprop(node, "bus-frequency", (void *)&freq,
+	    sizeof(freq)) <= 0)
+		return;
+
+	/*
+	 * Set clock-frequency for FMan nodes (only on QorIQ DPAA targets).
+	 * That frequency is equal to /soc node bus-frequency.
+	 */
+	for (node = OF_child(node); node != 0; node = OF_peer(node)) {
+		if (fdt_is_compatible(node, "fsl,fman") == 0)
+			continue;
+
+		if (OF_setprop(node, "clock-frequency", (void *)&freq,
+		    sizeof(freq)) == -1) {
+			/*
+			 * XXX Shall we take some actions if no clock-frequency
+			 * property was found?
+			 */
+		}
+	}
+}
+
 struct fdt_fixup_entry fdt_fixup_table[] = {
-	{ "fsl,MPC8572DS", &fdt_fixup_busfreq },
-	{ "MPC8555CDS", &fdt_fixup_busfreq },
+	{ "fsl,MPC8572DS", &fdt_fixup_busfreq_mpc85xx },
+	{ "MPC8555CDS", &fdt_fixup_busfreq_mpc85xx },
+	{ "fsl,P2020", &fdt_fixup_busfreq_mpc85xx },
+	{ "fsl,P2041RDB", &fdt_fixup_busfreq_dpaa },
+	{ "fsl,P2041RDB", &fdt_fixup_fman },
+	{ "fsl,P3041DS", &fdt_fixup_busfreq_dpaa },
+	{ "fsl,P3041DS", &fdt_fixup_fman },
+	{ "fsl,P5020DS", &fdt_fixup_busfreq_dpaa },
+	{ "fsl,P5020DS", &fdt_fixup_fman },
+	{ "varisys,CYRUS", &fdt_fixup_busfreq_dpaa },
+	{ "varisys,CYRUS", &fdt_fixup_fman },
 	{ NULL, NULL }
 };