[RFC for-4.8 v2 4/7] xen/device-tree: Make dt_match_node match props

["Edgar E. Iglesias" <edgar.iglesias@gmail.com>]

From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>

Make dt_match_node match for existing properties.
We only search for the existance of the properties, not
for specific values.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
 xen/common/device_tree.c      | 9 ++++++++-
 xen/include/xen/device_tree.h | 3 +++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
index 06a2837..fbee354 100644
--- a/xen/common/device_tree.c
+++ b/xen/common/device_tree.c
@@ -323,8 +323,9 @@ dt_match_node(const struct dt_device_match *matches,
         return NULL;
 
     while ( matches->path || matches->type ||
-            matches->compatible || matches->not_available )
+            matches->compatible || matches->not_available || matches->props)
     {
+        const char **props = matches->props;
         bool_t match = 1;
 
         if ( matches->path )
@@ -339,6 +340,12 @@ dt_match_node(const struct dt_device_match *matches,
         if ( matches->not_available )
             match &= !dt_device_is_available(node);
 
+        while ( match && props && *props )
+        {
+            match &= dt_find_property(node, *props, NULL) != NULL;
+            props++;
+        }
+
         if ( match )
             return matches;
         matches++;
diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h
index b348913..f13d186 100644
--- a/xen/include/xen/device_tree.h
+++ b/xen/include/xen/device_tree.h
@@ -30,6 +30,7 @@ struct dt_device_match {
     const char *type;
     const char *compatible;
     const bool_t not_available;
+    const char **props;
     const void *data;
 };
 
@@ -37,11 +38,13 @@ struct dt_device_match {
 #define __DT_MATCH_TYPE(typ)            .type = typ
 #define __DT_MATCH_COMPATIBLE(compat)   .compatible = compat
 #define __DT_MATCH_NOT_AVAILABLE()      .not_available = 1
+#define __DT_MATCH_PROPS(p...)          .props = (const char *[]) { p, NULL }
 
 #define DT_MATCH_PATH(p)                { __DT_MATCH_PATH(p) }
 #define DT_MATCH_TYPE(typ)              { __DT_MATCH_TYPE(typ) }
 #define DT_MATCH_COMPATIBLE(compat)     { __DT_MATCH_COMPATIBLE(compat) }
 #define DT_MATCH_NOT_AVAILABLE()        { __DT_MATCH_NOT_AVAILABLE() }
+#define DT_MATCH_PROPS(p...)            { __DT_MATCH_PROPS(p) }
 
 typedef u32 dt_phandle;
 
-- 
2.5.0


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel