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authorSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>2013-09-18 11:53:05 +0100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-10-31 16:19:19 +1100
commita3e31b4588443f37d82195096c6b30dff1c152c2 (patch)
tree8a5dfd747a2d55e7106f2faeeb97d4e29fef6e15 /drivers/of/base.c
parentafaf53985431bb295e4b723b08a55d0540cf8070 (diff)
downloadop-kernel-dev-a3e31b4588443f37d82195096c6b30dff1c152c2.zip
op-kernel-dev-a3e31b4588443f37d82195096c6b30dff1c152c2.tar.gz
of: Move definition of of_find_next_cache_node into common code.
Since the definition of_find_next_cache_node is architecture independent, the existing definition in powerpc can be moved to driver/of/base.c Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/of/base.c')
-rw-r--r--drivers/of/base.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 865d3f6..b2cee3db 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1884,3 +1884,34 @@ int of_device_is_stdout_path(struct device_node *dn)
return of_stdout == dn;
}
EXPORT_SYMBOL_GPL(of_device_is_stdout_path);
+
+/**
+ * of_find_next_cache_node - Find a node's subsidiary cache
+ * @np: node of type "cpu" or "cache"
+ *
+ * Returns a node pointer with refcount incremented, use
+ * of_node_put() on it when done. Caller should hold a reference
+ * to np.
+ */
+struct device_node *of_find_next_cache_node(const struct device_node *np)
+{
+ struct device_node *child;
+ const phandle *handle;
+
+ handle = of_get_property(np, "l2-cache", NULL);
+ if (!handle)
+ handle = of_get_property(np, "next-level-cache", NULL);
+
+ if (handle)
+ return of_find_node_by_phandle(be32_to_cpup(handle));
+
+ /* OF on pmac has nodes instead of properties named "l2-cache"
+ * beneath CPU nodes.
+ */
+ if (!strcmp(np->type, "cpu"))
+ for_each_child_of_node(np, child)
+ if (!strcmp(child->type, "cache"))
+ return child;
+
+ return NULL;
+}
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