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of: match by compatible property first

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When matching devices against an OF device ID table, the first string of
the compatible property that is listed in the table should match,
regardless of its position in the table.

Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: devicetree-discuss@lists.ozlabs.org
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
This commit is contained in:
Thierry Reding 2012-06-14 09:12:35 +02:00 committed by Rob Herring
parent d44115f28e
commit 107a84e61c
1 changed files with 26 additions and 4 deletions
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30
drivers/of/base.c
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@ -511,6 +511,22 @@ struct device_node *of_find_node_with_property(struct device_node *from,
}
EXPORT_SYMBOL(of_find_node_with_property);
static const struct of_device_id *of_match_compat(const struct of_device_id *matches,
const char *compat)
{
while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
const char *cp = matches->compatible;
int len = strlen(cp);
if (len > 0 && of_compat_cmp(compat, cp, len) == 0)
return matches;
matches++;
}
return NULL;
}
/**
* of_match_node - Tell if an device_node has a matching of_match structure
* @matches: array of of device match structures to search in
@ -521,9 +537,18 @@ EXPORT_SYMBOL(of_find_node_with_property);
const struct of_device_id *of_match_node(const struct of_device_id *matches,
const struct device_node *node)
{
struct property *prop;
const char *cp;
if (!matches)
return NULL;
of_property_for_each_string(node, "compatible", prop, cp) {
const struct of_device_id *match = of_match_compat(matches, cp);
if (match)
return match;
}
while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
int match = 1;
if (matches->name[0])
@ -532,10 +557,7 @@ const struct of_device_id *of_match_node(const struct of_device_id *matches,
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)
if (match && !matches->compatible[0])
return matches;
matches++;
}