of: base: use of_property_read_u32()

of_n_{addr|size}_cells() predate of_property_read_u32(), so they have to
basically open-code it. Using the modern DT API saves several LoCs and also
adds some prop sanity checks as a bonus...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 5551ac2..830f8d2 100644 (file)
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -60,14 +60,13 @@ DEFINE_RAW_SPINLOCK(devtree_lock);
 
 int of_n_addr_cells(struct device_node *np)
 {
-       const __be32 *ip;
+       u32 cells;
 
        do {
                if (np->parent)
                        np = np->parent;
-               ip = of_get_property(np, "#address-cells", NULL);
-               if (ip)
-                       return be32_to_cpup(ip);
+               if (!of_property_read_u32(np, "#address-cells", &cells))
+                       return cells;
        } while (np->parent);
        /* No #address-cells property for the root node */
        return OF_ROOT_NODE_ADDR_CELLS_DEFAULT;
@@ -76,14 +75,13 @@ EXPORT_SYMBOL(of_n_addr_cells);
 
 int of_n_size_cells(struct device_node *np)
 {
-       const __be32 *ip;
+       u32 cells;
 
        do {
                if (np->parent)
                        np = np->parent;
-               ip = of_get_property(np, "#size-cells", NULL);
-               if (ip)
-                       return be32_to_cpup(ip);
+               if (!of_property_read_u32(np, "#size-cells", &cells))
+                       return cells;
        } while (np->parent);
        /* No #size-cells property for the root node */
        return OF_ROOT_NODE_SIZE_CELLS_DEFAULT;