Set a property to a phandle of a child node. This may be used
for selections like display-timings.
Signed-off-by: Teresa Gámez <t.ga...@phytec.de>
---
drivers/of/base.c | 21 +++++++++++++++++++++
include/of.h | 1 +
2 files changed, 22 insertions(+)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index f363cc1..e9f0883 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -356,6 +356,27 @@ phandle of_node_create_phandle(struct device_node *node)
}
EXPORT_SYMBOL(of_node_create_phandle);
+int of_set_property_to_child_phandle(struct device_node *node, char *prop_name)
+{
+ int ret;
+ phandle p;
+
+ /* Check if property exist */
+ if (!of_get_property(of_get_parent(node), prop_name, NULL))
+ return -EINVAL;
+
+ /* Create or get existing phandle of child node */
+ p = of_node_create_phandle(node);
+ p = cpu_to_be32(p);
+
+ node = of_get_parent(node);
+
+ ret = of_set_property(node, prop_name, &p, sizeof(p), 0);
+
+ return ret;
+}
+EXPORT_SYMBOL(of_set_property_to_child_phandle);
+
/*
* Find a property with a given name for a given node
* and return the value.
diff --git a/include/of.h b/include/of.h
index decf151..29694a9 100644
--- a/include/of.h
+++ b/include/of.h
@@ -714,6 +714,7 @@ int of_device_disable_path(const char *path);
phandle of_get_tree_max_phandle(struct device_node *root);
phandle of_node_create_phandle(struct device_node *node);
+int of_set_property_to_child_phandle(struct device_node *node, char
*prop_name);
struct device_node *of_find_node_by_alias(struct device_node *root,
const char *alias);
struct device_node *of_find_node_by_path_or_alias(struct device_node *root,
--
1.9.1
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