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authorGrant Likely <grant.likely@secretlab.ca>2011-03-18 10:21:28 -0600
committerGrant Likely <grant.likely@secretlab.ca>2011-03-23 14:55:55 -0600
commit38e9e21dac33082f0440d24aefb3466bb18bfed6 (patch)
treeb222f3a436508faab42afe76f1f2e78f1933fbbc /drivers/of
parent4bbba111d94781d34081c37856bbc5eb33f6c72a (diff)
dt: Refactor of_platform_bus_probe()
The current implementation uses three copies of of basically identical code. This patch consolidates them to make the code simpler. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/platform.c55
1 files changed, 18 insertions, 37 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 1ce4c45c4ab2..f489e36af892 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -210,13 +210,16 @@ struct platform_device *of_platform_device_create(struct device_node *np,
EXPORT_SYMBOL(of_platform_device_create);
/**
- * of_platform_bus_create - Create an OF device for a bus node and all its
- * children. Optionally recursively instantiate matching busses.
+ * 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
- * disallow recursive creation of child busses
+ * disallow recursive creation of child buses
+ * @parent: parent for new device, or NULL for top level.
+ *
+ * Creates a platform_device for the provided device_node, and optionally
+ * recursively create devices for all the child nodes.
*/
-static int of_platform_bus_create(const struct device_node *bus,
+static int of_platform_bus_create(struct device_node *bus,
const struct of_device_id *matches,
struct device *parent)
{
@@ -224,18 +227,13 @@ static int of_platform_bus_create(const struct device_node *bus,
struct platform_device *dev;
int rc = 0;
+ dev = of_platform_device_create(bus, NULL, parent);
+ if (!dev || !of_match_node(matches, bus))
+ return 0;
+
for_each_child_of_node(bus, child) {
pr_debug(" create child: %s\n", child->full_name);
- dev = of_platform_device_create(child, NULL, parent);
- if (dev == NULL)
- continue;
-
- if (!of_match_node(matches, child))
- continue;
- if (rc == 0) {
- pr_debug(" and sub busses\n");
- rc = of_platform_bus_create(child, matches, &dev->dev);
- }
+ rc = of_platform_bus_create(child, matches, &dev->dev);
if (rc) {
of_node_put(child);
break;
@@ -245,7 +243,7 @@ static int of_platform_bus_create(const struct device_node *bus,
}
/**
- * of_platform_bus_probe - Probe the device-tree for platform busses
+ * 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
* @parent: parent to hook devices from, NULL for toplevel
@@ -258,7 +256,6 @@ int of_platform_bus_probe(struct device_node *root,
struct device *parent)
{
struct device_node *child;
- struct platform_device *dev;
int rc = 0;
if (WARN_ON(!matches || matches == OF_NO_DEEP_PROBE))
@@ -277,31 +274,15 @@ int of_platform_bus_probe(struct device_node *root,
* children
*/
if (of_match_node(matches, root)) {
- pr_debug(" root match, create all sub devices\n");
- dev = of_platform_device_create(root, NULL, parent);
- if (dev == NULL)
- goto bail;
-
- pr_debug(" create all sub busses\n");
- rc = of_platform_bus_create(root, matches, &dev->dev);
- goto bail;
- }
- for_each_child_of_node(root, child) {
+ rc = of_platform_bus_create(root, matches, parent);
+ } else for_each_child_of_node(root, child) {
if (!of_match_node(matches, child))
continue;
-
- pr_debug(" match: %s\n", child->full_name);
- dev = of_platform_device_create(child, NULL, parent);
- if (dev == NULL)
- continue;
-
- rc = of_platform_bus_create(child, matches, &dev->dev);
- if (rc) {
- of_node_put(child);
+ rc = of_platform_bus_create(child, matches, parent);
+ if (rc)
break;
- }
}
- bail:
+
of_node_put(root);
return rc;
}

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