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.ripard@xxxxxxxxxxxxxxxxxx> --- libfdt/libfdt.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h index 331f32dd04b5..6589e08db7ab 100644 --- a/libfdt/libfdt.h +++ b/libfdt/libfdt.h @@ -456,6 +456,30 @@ int fdt_first_property_offset(const void *fdt, int nodeoffset); int fdt_next_property_offset(const void *fdt, int offset); /** + * fdt_for_each_property - iterate over all properties of a node + * @fdt: FDT blob (const void *) + * @node: node offset (int) + * @property: property offset (int) + * + * This is actually a wrapper around a for loop and would be used like so: + * + * fdt_for_each_property(fdt, node, property) { + * ... + * use property + * ... + * } + * + * Note that this is implemented as a macro and property is used as + * iterator in the loop. It should therefore be a locally allocated + * variable. The node variable on the other hand is never modified, so + * it can be constant or even a literal. + */ +#define fdt_for_each_property(fdt, node, property) \ + 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 -- 2.8.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree-compiler" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html