[POWERPC] CPM: Change from fsl,brg-frequency to brg/clock-frequency

As suggested by David Gibson, now that we have a separate node
for the baud rate generators, it's better to use the standard
clock-frequency property than a cpm-node-level fsl,brg-frequency
property.

This patch updates existing places where fsl,brg-frequency is
used.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/cuboot-8xx.c

@@ -29,10 +29,12 @@ static void platform_fixups(void)
 	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 16, bd.bi_busfreq);
 
 	node = finddevice("/soc/cpm");
-	if (node) {
+	if (node)
 		setprop(node, "clock-frequency", &bd.bi_busfreq, 4);
-		setprop(node, "fsl,brg-frequency", &bd.bi_busfreq, 4);
-	}
+
+	node = finddevice("/soc/cpm/brg");
+	if (node)
+		setprop(node, "clock-frequency",  &bd.bi_busfreq, 4);
 }
 
 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,

arch/powerpc/boot/cuboot-pq2.c

@@ -264,10 +264,12 @@ static void pq2_platform_fixups(void)
 	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
 
 	node = finddevice("/soc/cpm");
-	if (node) {
+	if (node)
 		setprop(node, "clock-frequency", &bd.bi_cpmfreq, 4);
-		setprop(node, "fsl,brg-frequency", &bd.bi_brgfreq, 4);
-	}
+
+	node = finddevice("/soc/cpm/brg");
+	if (node)
+		setprop(node, "clock-frequency",  &bd.bi_brgfreq, 4);
 
 	update_cs_ranges();
 	fixup_pci();

arch/powerpc/sysdev/fsl_soc.c

@@ -73,22 +73,26 @@ static u32 brgfreq = -1;
 u32 get_brgfreq(void)
 {
 	struct device_node *node;
+	const unsigned int *prop;
+	int size;
 
 	if (brgfreq != -1)
 		return brgfreq;
 
-	node = of_find_compatible_node(NULL, NULL, "fsl,cpm1");
-	if (!node)
-		node = of_find_compatible_node(NULL, NULL, "fsl,cpm2");
-	if (!node)
-		node = of_find_node_by_type(NULL, "cpm");
+	node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
 	if (node) {
-		int size;
-		const unsigned int *prop;
+		prop = of_get_property(node, "clock-frequency", &size);
+		if (prop && size == 4)
+			brgfreq = *prop;
 
-		prop = of_get_property(node, "fsl,brg-frequency", &size);
-		if (!prop)
-			prop = of_get_property(node, "brg-frequency", &size);
+		of_node_put(node);
+		return brgfreq;
+	}
+
+	/* Legacy device binding -- will go away when no users are left. */
+	node = of_find_node_by_type(NULL, "cpm");
+	if (node) {
+		prop = of_get_property(node, "brg-frequency", &size);
 		if (prop && size == 4)
 			brgfreq = *prop;