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of/flattree: Merge earlyinit_dt_scan_root()

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Merge common code between PowerPC and Microblaze

Signed-off-by: Grant Likely <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>
Tested-by: Wolfram Sang <[email protected]>
This commit is contained in:
Grant Likely 2009-11-24 03:27:10 -07:00
commit f00abd9491
4 changed files with 32 additions and 47 deletions
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26
drivers/of/fdt.c
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@ -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)
@ -406,6 +409,29 @@ inline void early_init_dt_check_for_initrd(unsigned long node)
}
#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
*