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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-21 10:30:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-21 10:30:03 -0700
commitf8974cb71310a05632aada76be6a27576d61e609 (patch)
treec0b6f59333796c95aa2de9a2eb755e9b68599b71 /drivers/of/base.c
parentc207f3a43194e108dda43dc9a1ce507335cff6b9 (diff)
parent0f22dd395fc473cee252b9af50249b8e0f32fde7 (diff)
downloadop-kernel-dev-f8974cb71310a05632aada76be6a27576d61e609.zip
op-kernel-dev-f8974cb71310a05632aada76be6a27576d61e609.tar.gz
Merge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull core device tree changes for Linux v3.4 from Grant Likely: "This branch contains a minor documentation addition, a utility function for parsing string properties needed by some of the new ARM platforms, disables dynamic DT code that isn't used anywhere but on a few PPC machines, and exports DT node compatible data to userspace via UEVENT properties. Nothing earth shattering here." * tag 'dt-for-linus' of git://git.secretlab.ca/git/linux-2.6: of: Only compile OF_DYNAMIC on PowerPC pseries and iseries arm/dts: OMAP3: Add omap3evm and am335xevm support drivercore: Output common devicetree information in uevent of: Add of_property_match_string() to find index into a string list
Diffstat (limited to 'drivers/of/base.c')
-rw-r--r--drivers/of/base.c40
1 files changed, 38 insertions, 2 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 133908a..5806449 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -88,7 +88,7 @@ int of_n_size_cells(struct device_node *np)
}
EXPORT_SYMBOL(of_n_size_cells);
-#if !defined(CONFIG_SPARC) /* SPARC doesn't do ref counting (yet) */
+#if defined(CONFIG_OF_DYNAMIC)
/**
* of_node_get - Increment refcount of a node
* @node: Node to inc refcount, NULL is supported to
@@ -161,7 +161,7 @@ void of_node_put(struct device_node *node)
kref_put(&node->kref, of_node_release);
}
EXPORT_SYMBOL(of_node_put);
-#endif /* !CONFIG_SPARC */
+#endif /* CONFIG_OF_DYNAMIC */
struct property *of_find_property(const struct device_node *np,
const char *name,
@@ -761,6 +761,42 @@ int of_property_read_string_index(struct device_node *np, const char *propname,
}
EXPORT_SYMBOL_GPL(of_property_read_string_index);
+/**
+ * of_property_match_string() - Find string in a list and return index
+ * @np: pointer to node containing string list property
+ * @propname: string list property name
+ * @string: pointer to string to search for in string list
+ *
+ * This function searches a string list property and returns the index
+ * of a specific string value.
+ */
+int of_property_match_string(struct device_node *np, const char *propname,
+ const char *string)
+{
+ struct property *prop = of_find_property(np, propname, NULL);
+ size_t l;
+ int i;
+ const char *p, *end;
+
+ if (!prop)
+ return -EINVAL;
+ if (!prop->value)
+ return -ENODATA;
+
+ p = prop->value;
+ end = p + prop->length;
+
+ for (i = 0; p < end; i++, p += l) {
+ l = strlen(p) + 1;
+ if (p + l > end)
+ return -EILSEQ;
+ pr_debug("comparing %s with %s\n", string, p);
+ if (strcmp(string, p) == 0)
+ return i; /* Found it; return index */
+ }
+ return -ENODATA;
+}
+EXPORT_SYMBOL_GPL(of_property_match_string);
/**
* of_property_count_strings - Find and return the number of strings from a
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