[POWERPC] Add of_find_matching_node() helper function

Similar to of_find_compatible_node(), of_find_matching_node() and
for_each_matching_node() allow you to iterate over the device tree
looking for specific nodes, except that they take of_device_id
tables instead of strings.

This also moves of_match_node() from driver/of/device.c to
driver/of/base.c to colocate it with the of_find_matching_node which
depends on it.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Grant Likely 2008-01-09 06:20:40 +11:00 коммит произвёл Paul Mackerras
Родитель 91bbbe22db
Коммит 283029d16a
10 изменённых файлов: 73 добавлений и 32 удалений

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@ -41,6 +41,7 @@
#include <linux/kobject.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <asm/ibmebus.h>
#include <asm/abs_addr.h>

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@ -19,6 +19,7 @@
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>

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@ -22,6 +22,7 @@
#undef DEBUG
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/irq.h>

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@ -31,6 +31,7 @@
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/pci_regs.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/io.h>

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@ -37,6 +37,7 @@
#include <linux/mii.h>
#include <linux/bitops.h>
#include <linux/workqueue.h>
#include <linux/of.h>
#include <asm/processor.h>
#include <asm/io.h>

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@ -273,3 +273,61 @@ struct device_node *of_find_compatible_node(struct device_node *from,
return np;
}
EXPORT_SYMBOL(of_find_compatible_node);
/**
* of_match_node - Tell if an device_node has a matching of_match structure
* @matches: array of of device match structures to search in
* @node: the of device structure to match against
*
* Low level utility function used by device matching.
*/
const struct of_device_id *of_match_node(const struct of_device_id *matches,
const struct device_node *node)
{
while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
int match = 1;
if (matches->name[0])
match &= node->name
&& !strcmp(matches->name, node->name);
if (matches->type[0])
match &= node->type
&& !strcmp(matches->type, node->type);
if (matches->compatible[0])
match &= of_device_is_compatible(node,
matches->compatible);
if (match)
return matches;
matches++;
}
return NULL;
}
EXPORT_SYMBOL(of_match_node);
/**
* of_find_matching_node - Find a node based on an of_device_id match
* table.
* @from: The node to start searching from or NULL, the node
* you pass will not be searched, only the next one
* will; typically, you pass what the previous call
* returned. of_node_put() will be called on it
* @matches: array of of device match structures to search in
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_find_matching_node(struct device_node *from,
const struct of_device_id *matches)
{
struct device_node *np;
read_lock(&devtree_lock);
np = from ? from->allnext : allnodes;
for (; np; np = np->allnext) {
if (of_match_node(matches, np) && of_node_get(np))
break;
}
of_node_put(from);
read_unlock(&devtree_lock);
return np;
}
EXPORT_SYMBOL(of_find_matching_node);

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@ -9,35 +9,6 @@
#include <asm/errno.h>
/**
* of_match_node - Tell if an device_node has a matching of_match structure
* @ids: array of of device match structures to search in
* @node: the of device structure to match against
*
* Low level utility function used by device matching.
*/
const struct of_device_id *of_match_node(const struct of_device_id *matches,
const struct device_node *node)
{
while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
int match = 1;
if (matches->name[0])
match &= node->name
&& !strcmp(matches->name, node->name);
if (matches->type[0])
match &= node->type
&& !strcmp(matches->type, node->type);
if (matches->compatible[0])
match &= of_device_is_compatible(node,
matches->compatible);
if (match)
return matches;
matches++;
}
return NULL;
}
EXPORT_SYMBOL(of_match_node);
/**
* of_match_device - Tell if an of_device structure has a matching
* of_match structure

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@ -72,7 +72,8 @@
#include <asm/io.h>
#if defined(CONFIG_PPC_MERGE)
#include <asm/of_platform.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#else
#include <linux/platform_device.h>
#endif

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@ -17,6 +17,7 @@
*/
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/mod_devicetable.h>
#include <asm/prom.h>
@ -41,6 +42,11 @@ extern struct device_node *of_find_compatible_node(struct device_node *from,
#define for_each_compatible_node(dn, type, compatible) \
for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
dn = of_find_compatible_node(dn, type, compatible))
extern struct device_node *of_find_matching_node(struct device_node *from,
const struct of_device_id *matches);
#define for_each_matching_node(dn, matches) \
for (dn = of_find_matching_node(NULL, matches); dn; \
dn = of_find_matching_node(dn, matches))
extern struct device_node *of_find_node_by_path(const char *path);
extern struct device_node *of_find_node_by_phandle(phandle handle);
extern struct device_node *of_get_parent(const struct device_node *node);
@ -60,5 +66,7 @@ extern const void *of_get_property(const struct device_node *node,
int *lenp);
extern int of_n_addr_cells(struct device_node *np);
extern int of_n_size_cells(struct device_node *np);
extern const struct of_device_id *of_match_node(
const struct of_device_id *matches, const struct device_node *node);
#endif /* _LINUX_OF_H */

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@ -10,8 +10,6 @@
#define to_of_device(d) container_of(d, struct of_device, dev)
extern const struct of_device_id *of_match_node(
const struct of_device_id *matches, const struct device_node *node);
extern const struct of_device_id *of_match_device(
const struct of_device_id *matches, const struct of_device *dev);