From: Maxime Ripard <maxime.rip...@free-electrons.com>
Implement a macro based on fdt_first_property_offset and
fdt_next_property_offset that provides a convenience to iterate over all
the properties of a given node.
Signed-off-by: Maxime Ripard <maxime.rip...@free-electrons.com>
Acked-by: Simon Glass <s...@chromium.org>
[dwg: Removed a stray trailing blank line]
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
---
cpukit/include/libfdt.h | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/cpukit/include/libfdt.h b/cpukit/include/libfdt.h
index 911e548163..be109a8aac 100644
--- a/cpukit/include/libfdt.h
+++ b/cpukit/include/libfdt.h
@@ -459,6 +459,33 @@ int fdt_first_property_offset(const void *fdt, int
nodeoffset);
int fdt_next_property_offset(const void *fdt, int offset);
/**
+ * fdt_for_each_property_offset - iterate over all properties of a node
+ *
+ * @property_offset: property offset (int, lvalue)
+ * @fdt: FDT blob (const void *)
+ * @node: node offset (int)
+ *
+ * This is actually a wrapper around a for loop and would be used like so:
+ *
+ * fdt_for_each_property_offset(property, fdt, node) {
+ * Use property
+ * ...
+ * }
+ *
+ * if ((property < 0) && (property != -FDT_ERR_NOT_FOUND)) {
+ * Error handling
+ * }
+ *
+ * Note that this is implemented as a macro and property is used as
+ * iterator in the loop. The node variable can be constant or even a
+ * literal.
+ */
+#define fdt_for_each_property_offset(property, fdt, node) \
+ for (property = fdt_first_property_offset(fdt, node); \
+ property >= 0; \
+ property = fdt_next_property_offset(fdt, property))
+
+/**
* fdt_get_property_by_offset - retrieve the property at a given offset
* @fdt: pointer to the device tree blob
* @offset: offset of the property to retrieve
--
2.13.7
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