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of: base: import of_find_node_by_type 

Import of_find_node_by_type from Linux drivers/of/base.c -
commit id d8dfad3.
This function retrieves a node pointer based on the "device_type"
property of the node.

This is used by device tree update functions in PPC support.

Signed-off-by: Renaud Barbier <renaud.barbier@ge.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Renaud Barbier 2013-09-03 15:54:24 +01:00 committed by Sascha Hauer
parent 7f5c04321d
commit da19582070
2 changed files with 31 additions and 0 deletions
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29
drivers/of/base.c
View File

@ -400,6 +400,35 @@ struct device_node *of_find_node_by_name(struct device_node *from,
}
EXPORT_SYMBOL(of_find_node_by_name);
/**
* of_find_node_by_type - Find a node by its "device_type" property
* @from: The node to start searching from, or NULL to start searching
* the entire device tree. The node you pass will not be
* searched, only the next one will; typically, you pass
* what the previous call returned.
* @type: The type string to match against.
*
* Returns a pointer to the node found or NULL.
*/
struct device_node *of_find_node_by_type(struct device_node *from,
const char *type)
{
struct device_node *np;
const char *device_type;
int ret;
if (!from)
from = root_node;
of_tree_for_each_node_from(np, from) {
ret = of_property_read_string(np, "device_type", &device_type);
if (!ret && !of_node_cmp(device_type, type))
return np;
}
return NULL;
}
EXPORT_SYMBOL(of_find_node_by_type);
/**
* of_find_compatible_node - Find a node based on type and one of the
* tokens in its "compatible" property

2
include/of.h
View File

@ -124,6 +124,8 @@ extern struct device_node *of_find_node_by_path_from(struct device_node *from,
const char *path);
extern struct device_node *of_find_node_by_path(const char *path);
extern struct device_node *of_find_node_by_phandle(phandle phandle);
extern struct device_node *of_find_node_by_type(struct device_node *from,
const char *type);
extern struct device_node *of_find_compatible_node(struct device_node *from,
const char *type, const char *compat);
extern const struct of_device_id *of_match_node(