dm: core: implement phandle ofnode_options helper
Implement ofnode_options phandle helper to get an ofnode from a phandle
option in /options/u-boot.
This helper can be useful since new DT yaml usually require to link a
phandle of a node instead of referencing it by name or other indirect
way.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index dc6ac06..c816182 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -1871,6 +1871,21 @@
return ofnode_read_string(uboot, prop_name);
}
+int ofnode_options_get_by_phandle(const char *prop_name, ofnode *nodep)
+{
+ ofnode uboot;
+
+ uboot = ofnode_path("/options/u-boot");
+ if (!ofnode_valid(uboot))
+ return -EINVAL;
+
+ *nodep = ofnode_parse_phandle(uboot, prop_name, 0);
+ if (!ofnode_valid(*nodep))
+ return -EINVAL;
+
+ return 0;
+}
+
int ofnode_read_bootscript_address(u64 *bootscr_address, u64 *bootscr_offset)
{
int ret;
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index eea6b13..890f0e6 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -1721,6 +1721,21 @@
const char *ofnode_options_read_str(const char *prop_name);
/**
+ * ofnode_options_get_by_phandle() - Get a ofnode from phandle from the U-Boot options
+ *
+ * This reads a property from the /options/u-boot/ node of the devicetree.
+ *
+ * This only works with the control FDT.
+ *
+ * See dtschema/schemas/options/u-boot.yaml in dt-schema project for bindings
+ *
+ * @prop_name: property name to look up
+ * @nodep: pointer to ofnode where node is stored
+ * Return: 0, if found, or negative error if not
+ */
+int ofnode_options_get_by_phandle(const char *prop_name, ofnode *nodep);
+
+/**
* ofnode_read_bootscript_address() - Read bootscr-address or bootscr-ram-offset
*
* @bootscr_address: pointer to 64bit address where bootscr-address property value