Consolidate of_device_is_compatible

The only difference here is that Sparc uses strncmp to match compatibility
names while PowerPC uses strncasecmp.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: David S. Miller <davem@davemloft.net>

7 files changed, 30 insertions, 67 deletions

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 6c9419a4d70..c009d2155f9 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1057,31 +1057,6 @@ void __init early_init_devtree(void *params)
 }
 
 
-/** Checks if the given "compat" string matches one of the strings in
- * the device's "compatible" property
- */
-int of_device_is_compatible(const struct device_node *device,
-		const char *compat)
-{
-	const char* cp;
-	int cplen, l;
-
-	cp = of_get_property(device, "compatible", &cplen);
-	if (cp == NULL)
-		return 0;
-	while (cplen > 0) {
-		if (strncasecmp(cp, compat, strlen(compat)) == 0)
-			return 1;
-		l = strlen(cp) + 1;
-		cp += l;
-		cplen -= l;
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(of_device_is_compatible);
-
-
 /**
  * Indicates whether the root node has a given value in its
  * compatible property.
diff --git a/arch/sparc/kernel/prom.c b/arch/sparc/kernel/prom.c
index ac3f3c29b17..f2ce0d48e10 100644
--- a/arch/sparc/kernel/prom.c
+++ b/arch/sparc/kernel/prom.c
@@ -32,27 +32,6 @@ static struct device_node *allnodes;
  */
 static DEFINE_RWLOCK(devtree_lock);
 
-int of_device_is_compatible(const struct device_node *device,
-			    const char *compat)
-{
-	const char* cp;
-	int cplen, l;
-
-	cp = of_get_property(device, "compatible", &cplen);
-	if (cp == NULL)
-		return 0;
-	while (cplen > 0) {
-		if (strncmp(cp, compat, strlen(compat)) == 0)
-			return 1;
-		l = strlen(cp) + 1;
-		cp += l;
-		cplen -= l;
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(of_device_is_compatible);
-
 struct device_node *of_get_parent(const struct device_node *node)
 {
 	struct device_node *np;
diff --git a/arch/sparc64/kernel/prom.c b/arch/sparc64/kernel/prom.c
index 8f926d439c0..4d6fb07f047 100644
--- a/arch/sparc64/kernel/prom.c
+++ b/arch/sparc64/kernel/prom.c
@@ -37,27 +37,6 @@ static struct device_node *allnodes;
  */
 static DEFINE_RWLOCK(devtree_lock);
 
-int of_device_is_compatible(const struct device_node *device,
-			    const char *compat)
-{
-	const char* cp;
-	int cplen, l;
-
-	cp = of_get_property(device, "compatible", &cplen);
-	if (cp == NULL)
-		return 0;
-	while (cplen > 0) {
-		if (strncmp(cp, compat, strlen(compat)) == 0)
-			return 1;
-		l = strlen(cp) + 1;
-		cp += l;
-		cplen -= l;
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(of_device_is_compatible);
-
 struct device_node *of_get_parent(const struct device_node *node)
 {
 	struct device_node *np;
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 723d80d704e..d6dc5e74c27 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -63,3 +63,27 @@ const void *of_get_property(const struct device_node *np, const char *name,
 	return pp ? pp->value : NULL;
 }
 EXPORT_SYMBOL(of_get_property);
+
+/** Checks if the given "compat" string matches one of the strings in
+ * the device's "compatible" property
+ */
+int of_device_is_compatible(const struct device_node *device,
+		const char *compat)
+{
+	const char* cp;
+	int cplen, l;
+
+	cp = of_get_property(device, "compatible", &cplen);
+	if (cp == NULL)
+		return 0;
+	while (cplen > 0) {
+		if (of_compat_cmp(cp, compat, strlen(compat)) == 0)
+			return 1;
+		l = strlen(cp) + 1;
+		cp += l;
+		cplen -= l;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(of_device_is_compatible);
diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index 9fe0152ae24..b05f8f26940 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -24,6 +24,8 @@
 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT	1
 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT	1
 
+#define of_compat_cmp(s1, s2, l)	strncasecmp((s1), (s2), (l))
+
 /* Definitions used by the flattened device tree */
 #define OF_DT_HEADER		0xd00dfeed	/* marker */
 #define OF_DT_BEGIN_NODE	0x1		/* Start of node, full name */
diff --git a/include/asm-sparc/prom.h b/include/asm-sparc/prom.h
index a8a121f6332..c755c69404f 100644
--- a/include/asm-sparc/prom.h
+++ b/include/asm-sparc/prom.h
@@ -23,6 +23,8 @@
 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT	2
 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT	1
 
+#define of_compat_cmp(s1, s2, l)	strncmp((s1), (s2), (l))
+
 typedef u32 phandle;
 typedef u32 ihandle;
 
diff --git a/include/asm-sparc64/prom.h b/include/asm-sparc64/prom.h
index c98d1545ee8..040d198ee84 100644
--- a/include/asm-sparc64/prom.h
+++ b/include/asm-sparc64/prom.h
@@ -23,6 +23,8 @@
 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT	2
 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT	1
 
+#define of_compat_cmp(s1, s2, l)	strncmp((s1), (s2), (l))
+
 typedef u32 phandle;
 typedef u32 ihandle;