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dtoc: Add some extra properties to nodes

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It is convenient to attach drivers, etc. to nodes so that we can use the
Node object as the main data structure in this module.

Add a function which adds the new properties, along with documentation.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-02-03 06:00:58 -07:00
parent f38161c576
commit 51d5d051fa
1 changed files with 37 additions and 0 deletions
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37
tools/dtoc/dtb_platdata.py
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@ -354,8 +354,44 @@ class DtbPlatdata():
self.scan_node(self._fdt.GetRoot(), valid_nodes)
self._valid_nodes = sorted(valid_nodes,
key=lambda x: conv_name_to_c(x.name))
def prepare_nodes(self):
"""Add extra properties to the nodes we are using
The following properties are added for use by dtoc:
idx: Index number of this node (0=first, etc.)
struct_name: Name of the struct dtd used by this node
var_name: C name for this node
child_devs: List of child devices for this node, each a None
child_refs: Dict of references for each child:
key: Position in child list (-1=head, 0=first, 1=second, ...
n-1=last, n=head)
seq: Sequence number of the device (unique within its uclass), or
-1 not not known yet
dev_ref: Reference to this device, e.g. 'DM_DEVICE_REF(serial)'
driver: Driver record for this node, or None if not known
uclass: Uclass record for this node, or None if not known
uclass_seq: Position of this device within the uclass list (0=first,
n-1=last)
parent_seq: Position of this device within it siblings (0=first,
n-1=last)
parent_driver: Driver record of the node's parent, or None if none.
We don't use node.parent.driver since node.parent may not be in
the list of valid nodes
"""
for idx, node in enumerate(self._valid_nodes):
node.idx = idx
node.struct_name, _ = self._scan.get_normalized_compat_name(node)
node.var_name = conv_name_to_c(node.name)
node.child_devs = []
node.child_refs = {}
node.seq = -1
node.dev_ref = None
node.driver = None
node.uclass = None
node.uclass_seq = None
node.parent_seq = None
node.parent_driver = None
@staticmethod
def get_num_cells(node):
@ -705,6 +741,7 @@ def run_steps(args, dtb_file, include_disabled, output, output_dirs,
plat = DtbPlatdata(scan, dtb_file, include_disabled)
plat.scan_dtb()
plat.scan_tree()
plat.prepare_nodes()
plat.scan_reg_sizes()
plat.setup_output_dirs(output_dirs)
plat.scan_structs()