of/flattree: Merge earlyinit_dt_scan_root()
Merge common code between PowerPC and Microblaze
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 6ad98e8..be200be 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -15,6 +15,9 @@
#include <linux/of.h>
#include <linux/of_fdt.h>
+int __initdata dt_root_addr_cells;
+int __initdata dt_root_size_cells;
+
struct boot_param_header *initial_boot_params;
char *find_flat_dt_string(u32 offset)
@@ -407,6 +410,29 @@
#endif /* CONFIG_BLK_DEV_INITRD */
/**
+ * early_init_dt_scan_root - fetch the top level address and size cells
+ */
+int __init early_init_dt_scan_root(unsigned long node, const char *uname,
+ int depth, void *data)
+{
+ u32 *prop;
+
+ if (depth != 0)
+ return 0;
+
+ prop = of_get_flat_dt_prop(node, "#size-cells", NULL);
+ dt_root_size_cells = (prop == NULL) ? 1 : *prop;
+ pr_debug("dt_root_size_cells = %x\n", dt_root_size_cells);
+
+ prop = of_get_flat_dt_prop(node, "#address-cells", NULL);
+ dt_root_addr_cells = (prop == NULL) ? 2 : *prop;
+ pr_debug("dt_root_addr_cells = %x\n", dt_root_addr_cells);
+
+ /* break now */
+ return 1;
+}
+
+/**
* unflatten_device_tree - create tree of device_nodes from flat blob
*
* unflattens the device-tree passed by the firmware, creating the