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Diffstat (limited to 'doc/develop')
| -rw-r--r-- | doc/develop/driver-model/livetree.rst | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/doc/develop/driver-model/livetree.rst b/doc/develop/driver-model/livetree.rst index fb2969259d0..c29f29b205b 100644 --- a/doc/develop/driver-model/livetree.rst +++ b/doc/develop/driver-model/livetree.rst @@ -225,6 +225,23 @@ freed. Then the tree can be scanned for these 'separately allocated' nodes and properties before freeing the memory block. +Multiple livetrees +------------------ + +The livetree implementation was originally designed for use with the control +FDT. This means that the FDT fix-ups (ft_board_setup() and the like, must use +a flat tree. + +It would be helpful to use livetree for fixups, since adding a lot of nodes and +properties would involve less memory copying and be more efficient. As a step +towards this, an `oftree` type has been introduced. It is normally set to +oftree_default() but can be set to other values. Eventually this should allow +the use of FDT fixups using the ofnode interface, instead of the low-level +libfdt one. + +See dm_test_ofnode_root() for some examples. + + Internal implementation ----------------------- |