powerpc: Use of_address_to_resource()

Replace open coded reading of "reg" or of_get_address()/
of_translate_address() calls with a single call to
of_address_to_resource().

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230329220337.141295-1-robh@kernel.org

1 files changed, 7 insertions, 14 deletions

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index b44ce71917d75..3a5c0d56b1ade 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -16,6 +16,7 @@
 #include <linux/cpu.h>
 #include <linux/notifier.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 #include <linux/pfn.h>
 #include <linux/cpuset.h>
 #include <linux/node.h>
@@ -1288,23 +1289,15 @@ static int hot_add_node_scn_to_nid(unsigned long scn_addr)
 	int nid = NUMA_NO_NODE;
 
 	for_each_node_by_type(memory, "memory") {
-		unsigned long start, size;
-		int ranges;
-		const __be32 *memcell_buf;
-		unsigned int len;
-
-		memcell_buf = of_get_property(memory, "reg", &len);
-		if (!memcell_buf || len <= 0)
-			continue;
+		int i = 0;
 
-		/* ranges in cell */
-		ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells);
+		while (1) {
+			struct resource res;
 
-		while (ranges--) {
-			start = read_n_cells(n_mem_addr_cells, &memcell_buf);
-			size = read_n_cells(n_mem_size_cells, &memcell_buf);
+			if (of_address_to_resource(memory, i++, &res))
+				break;
 
-			if ((scn_addr < start) || (scn_addr >= (start + size)))
+			if ((scn_addr < res.start) || (scn_addr > res.end))
 				continue;
 
 			nid = of_node_to_nid_single(memory);