dt: eliminate OF_NO_DEEP_PROBE and test for NULL match table

There are no users of OF_NO_DEEP_PROBE, and of_match_node() now
gracefully handles being passed a NULL pointer, so the checks at the
top of of_platform_bus_probe can be dropped.

While at it, consolidate the root node pointer check to be easier to
read and tidy up related comments.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index f489e36..63d3cb7 100644 (file)
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -212,7 +212,7 @@ EXPORT_SYMBOL(of_platform_device_create);
 /**
  * of_platform_bus_create() - Create a device for a node and its children.
  * @bus: device node of the bus to instantiate
- * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to
+ * @matches: match table for bus nodes
  * disallow recursive creation of child buses
  * @parent: parent for new device, or NULL for top level.
  *
@@ -245,7 +245,7 @@ static int of_platform_bus_create(struct device_node *bus,
 /**
  * of_platform_bus_probe() - Probe the device-tree for platform buses
  * @root: parent of the first level to probe or NULL for the root of the tree
- * @matches: match table, NULL to use the default
+ * @matches: match table for bus nodes
  * @parent: parent to hook devices from, NULL for toplevel
  *
  * Note that children of the provided root are not instantiated as devices
@@ -258,21 +258,14 @@ int of_platform_bus_probe(struct device_node *root,
        struct device_node *child;
        int rc = 0;
 
-       if (WARN_ON(!matches || matches == OF_NO_DEEP_PROBE))
-               return -EINVAL;
-       if (root == NULL)
-               root = of_find_node_by_path("/");
-       else
-               of_node_get(root);
-       if (root == NULL)
+       root = root ? of_node_get(root) : of_find_node_by_path("/");
+       if (!root)
                return -EINVAL;
 
        pr_debug("of_platform_bus_probe()\n");
        pr_debug(" starting at: %s\n", root->full_name);
 
-       /* Do a self check of bus type, if there's a match, create
-        * children
-        */
+       /* Do a self check of bus type, if there's a match, create children */
        if (of_match_node(matches, root)) {
                rc = of_platform_bus_create(root, matches, parent);
        } else for_each_child_of_node(root, child) {

diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
index 17c7e21..fb51ae3 100644 (file)
--- a/include/linux/of_platform.h
+++ b/include/linux/of_platform.h
@@ -52,9 +52,6 @@ extern struct platform_device *of_platform_device_create(struct device_node *np,
                                                   const char *bus_id,
                                                   struct device *parent);
 
-/* pseudo "matches" value to not do deep probe */
-#define OF_NO_DEEP_PROBE ((struct of_device_id *)-1)
-
 extern int of_platform_bus_probe(struct device_node *root,
                                 const struct of_device_id *matches,
                                 struct device *parent);