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dtoc: Check that a parent is not missing

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With of-platdata-inst we want to set up a reference to each devices'
parent device, if there is one. If we find that the device has a parent
(i.e. is not a root node) but it is not in the list of devices being
written, then we cannot create the reference.

Report an error in this case, since it indicates that the parent node
is either missing a compatible string, is disabled, or perhaps does not
have any properties because it was not tagged for SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-06-27 17:51:10 -06:00 committed by Bin Meng
parent 54e0bd1728
commit 1c56469ce1
3 changed files with 51 additions and 0 deletions
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9
tools/dtoc/dtb_platdata.py
View file

@ -749,6 +749,15 @@ class DtbPlatdata():
break
if node.parent and node.parent.parent:
if node.parent not in self._valid_nodes:
# This might indicate that the parent node is not in the
# SPL/TPL devicetree but the child is. For example if we are
# dealing with of-platdata in TPL, the parent has a
# u-boot,dm-tpl tag but the child has u-boot,dm-pre-reloc. In
# this case the child node exists in TPL but the parent does
# not.
raise ValueError("Node '%s' requires parent node '%s' but it is not in the valid list" %
(node.path, node.parent.path))
self.buf('\t.parent\t\t= DM_DEVICE_REF(%s),\n' %
node.parent.var_name)
if priv_name:

32
tools/dtoc/test/dtoc_test_noparent.dts Normal file
View file

@ -0,0 +1,32 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Test device tree file for dtoc
*
* Copyright 2017 Google, Inc
*/
/dts-v1/;
/ {
#address-cells = <1>;
#size-cells = <1>;
i2c@0 {
compatible = "sandbox,i2c";
u-boot,dm-tpl;
#address-cells = <1>;
#size-cells = <0>;
spl-test {
u-boot,dm-pre-reloc;
compatible = "sandbox,spl-test";
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
pmic@9 {
compatible = "sandbox,pmic";
u-boot,dm-pre-reloc;
reg = <9>;
low-power;
};
};
};
};

10
tools/dtoc/test_dtoc.py
View file

@ -1830,3 +1830,13 @@ U_BOOT_DRVINFO(spl_test2) = {
dtb_file = get_dtb_file('dtoc_test_single_reg.dts')
output = tools.GetOutputFilename('output')
self.run_test(['struct'], dtb_file, output)
def test_missing_parent(self):
"""Test detection of a parent node with no properties"""
dtb_file = get_dtb_file('dtoc_test_noparent.dts', capture_stderr=True)
output = tools.GetOutputFilename('output')
with self.assertRaises(ValueError) as exc:
self.run_test(['device'], dtb_file, output, instantiate=True)
self.assertIn("Node '/i2c@0/spl-test/pmic@9' requires parent node "
"'/i2c@0/spl-test' but it is not in the valid list",
str(exc.exception))