powerpc: fsl_soc: Use of_range_to_resource() for "ranges" parsing

"ranges" is a standard property with common parsing functions. Users
shouldn't be implementing their own parsing of it. Refactor the FSL RapidIO
"ranges" parsing to use of_range_to_resource() instead.

Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://msgid.link/[email protected]

Author: robherring

arch/powerpc/sysdev/fsl_soc.c

@@ -51,18 +51,10 @@ phys_addr_t get_immrbase(void)
 
 	soc = of_find_node_by_type(NULL, "soc");
 	if (soc) {
-		int size;
-		u32 naddr;
-		const __be32 *prop = of_get_property(soc, "#address-cells", &size);
-
-		if (prop && size == 4)
-			naddr = be32_to_cpup(prop);
-		else
-			naddr = 2;
-
-		prop = of_get_property(soc, "ranges", &size);
-		if (prop)
-			immrbase = of_translate_address(soc, prop + naddr);
+		struct resource res;
+
+		if (!of_range_to_resource(soc, 0, &res))
+			immrbase = res.start;
 
 		of_node_put(soc);
 	}