of/flattree: Add of_flat_dt_match() helper function

This patch adds of_flat_dt_match() which tests a node for
compatibility with a list of values and converts the relevant powerpc
platform code to use it.  This approach simplifies the board support
code a bit.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index 9ce5dfd2186a..ee96091f7d25 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -68,6 +68,8 @@ extern void *of_fdt_get_property(struct boot_param_header *blob,
 extern int of_fdt_is_compatible(struct boot_param_header *blob,
                                 unsigned long node,
                                 const char *compat);
+extern int of_fdt_match(struct boot_param_header *blob, unsigned long node,
+                        const char **compat);
 extern void of_fdt_unflatten_tree(unsigned long *blob,
                                struct device_node **mynodes);
 
@@ -84,6 +86,7 @@ extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
 extern void *of_get_flat_dt_prop(unsigned long node, const char *name,
                                  unsigned long *size);
 extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
+extern int of_flat_dt_match(unsigned long node, const char **matches);
 extern unsigned long of_get_flat_dt_root(void);
 
 extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,