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dt: Refactor of_platform_bus_probe()

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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>
This commit is contained in:
Grant Likely 2011-03-18 10:21:28 -06:00
parent 4bbba111d9
commit 38e9e21dac
1 changed files with 18 additions and 37 deletions
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55
drivers/of/platform.c
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@ -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;
}