[PATCH 1/2] Implement of_flat_dt_search() and use it for of_flat_dt_is_compatible.

[Tony Breeds]

Signed-off-by: Tony Breeds <tony at bakeyournoodle.com>
---
 arch/powerpc/kernel/prom.c |   21 ++++++++++++++-------
 include/asm-powerpc/prom.h |    2 ++
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index eac97f4..f73e18b 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -205,25 +205,32 @@ void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
 	} while(1);
 }
 
-int __init of_flat_dt_is_compatible(unsigned long node, const char *compat)
+int __init of_flat_dt_search(unsigned long node, const char *str,
+                             const char *prop_name)
 {
-	const char* cp;
-	unsigned long cplen, l;
+	const char *cp;
+	unsigned long plen, l;
 
-	cp = of_get_flat_dt_prop(node, "compatible", &cplen);
+	cp = of_get_flat_dt_prop(node, prop_name, &plen);
 	if (cp == NULL)
 		return 0;
-	while (cplen > 0) {
-		if (strncasecmp(cp, compat, strlen(compat)) == 0)
+	while (plen > 0) {
+		if (strncasecmp(cp, str, strlen(str)) == 0)
 			return 1;
 		l = strlen(cp) + 1;
 		cp += l;
-		cplen -= l;
+		plen -= l;
 	}
 
 	return 0;
 }
 
+int __init of_flat_dt_is_compatible(unsigned long node, const char *compat)
+{
+
+	return of_flat_dt_search(node, compat, "compatible");
+}
+
 static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size,
 				       unsigned long align)
 {
diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index 78b7b0d..7b587f1 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -134,6 +134,8 @@ extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
 				  void *data);
 extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
 					unsigned long *size);
+extern int __init of_flat_dt_search(unsigned long node, const char *str,
+                                  const char *prop_name);
 extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
 extern unsigned long __init of_get_flat_dt_root(void);
 
-- 
1.5.4.3