dm: core: add ofnode and dev function to iterate on node property
Add functions to iterate on all property with livetree
- dev_read_first_prop
- dev_read_next_prop
- dev_read_prop_by_prop
and
- ofnode_get_first_property
- ofnode_get_next_property
- ofnode_get_property_by_prop
And helper: dev_for_each_property
For example:
struct ofprop property;
dev_for_each_property(property, config) {
value = dev_read_prop_by_prop(&property, &propname, &len);
or:
for (res = ofnode_get_first_property(node, &property);
!res;
res = ofnode_get_next_property(&property))
{
value = ofnode_get_property_by_prop(&property, &propname, &len);
....
}
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index b0be7cb..20871a6 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -571,6 +571,54 @@
propname, lenp);
}
+int ofnode_get_first_property(ofnode node, struct ofprop *prop)
+{
+ prop->node = node;
+
+ if (ofnode_is_np(node)) {
+ prop->prop = of_get_first_property(ofnode_to_np(prop->node));
+ if (!prop->prop)
+ return -FDT_ERR_NOTFOUND;
+ } else {
+ prop->offset =
+ fdt_first_property_offset(gd->fdt_blob,
+ ofnode_to_offset(prop->node));
+ if (prop->offset < 0)
+ return prop->offset;
+ }
+
+ return 0;
+}
+
+int ofnode_get_next_property(struct ofprop *prop)
+{
+ if (ofnode_is_np(prop->node)) {
+ prop->prop = of_get_next_property(ofnode_to_np(prop->node),
+ prop->prop);
+ if (!prop->prop)
+ return -FDT_ERR_NOTFOUND;
+ } else {
+ prop->offset = fdt_next_property_offset(gd->fdt_blob,
+ prop->offset);
+ if (prop->offset < 0)
+ return prop->offset;
+ }
+
+ return 0;
+}
+
+const void *ofnode_get_property_by_prop(const struct ofprop *prop,
+ const char **propname, int *lenp)
+{
+ if (ofnode_is_np(prop->node))
+ return of_get_property_by_prop(ofnode_to_np(prop->node),
+ prop->prop, propname, lenp);
+ else
+ return fdt_getprop_by_offset(gd->fdt_blob,
+ prop->offset,
+ propname, lenp);
+}
+
bool ofnode_is_available(ofnode node)
{
if (ofnode_is_np(node))