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Since U-Boot supports both a live tree and a flat tree, we need an easy way to access the tree without worrying about which is currently active. To support this, U-Boot has the concept of an ofnode, which can refer either to a live tree node or a flat tree node. For the live tree, the reference contains a pointer to the node (struct device_node *) or NULL if the node is invalid. For the flat tree, the reference contains the node offset or -1 if the node is invalid. Add a basic set of operations using ofnodes. These are implemented by using either libfdt functions (in the case of a flat DT reference) or the live-tree of_...() functions. Note that it is not possible to have both live and flat references active at the same time. As soon as the live tree is available, everything in U-Boot should switch to using that. This avoids confusion and allows us to assume that the type of a reference is simply based on whether we have a live tree yet, or not. Signed-off-by: Simon Glass <sjg@chromium.org> |
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| .. | ||
| platform_data | ||
| device-internal.h | ||
| device.h | ||
| fdtaddr.h | ||
| lists.h | ||
| of_access.h | ||
| of.h | ||
| ofnode.h | ||
| pinctrl.h | ||
| platdata.h | ||
| root.h | ||
| test.h | ||
| uclass-id.h | ||
| uclass-internal.h | ||
| uclass.h | ||
| util.h | ||