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dtoc: Add a function to obtain a list of phandles

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Add a function which can decode a property containing a list of phandles.
This is useful for finding nodes linked to a property. Also provide a way
to look up a single phandle and get the Fdt object from a Node.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2018-07-17 13:25:46 -06:00
parent 4f5dea4543
commit 94a7c603b4
3 changed files with 57 additions and 0 deletions
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20
tools/dtoc/test_fdt.py
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@ -115,6 +115,9 @@ class TestFdt(unittest.TestCase):
fdt.CheckErr(-libfdt.NOTFOUND, 'hello')
self.assertIn('FDT_ERR_NOTFOUND: hello', str(e.exception))
def testGetFdt(self):
node = self.dtb.GetNode('/spl-test')
self.assertEqual(self.dtb, node.GetFdt())
class TestNode(unittest.TestCase):
"""Test operation of the Node class"""
@ -188,6 +191,14 @@ class TestNode(unittest.TestCase):
self.assertIn("Internal error, property 'notstring' missing, offset ",
str(e.exception))
def testLookupPhandle(self):
"""Test looking up a single phandle"""
dtb = fdt.FdtScan('tools/dtoc/dtoc_test_phandle.dts')
node = dtb.GetNode('/phandle-source2')
prop = node.props['clocks']
target = dtb.GetNode('/phandle-target')
self.assertEqual(target, dtb.LookupPhandle(fdt32_to_cpu(prop.value)))
class TestProp(unittest.TestCase):
"""Test operation of the Prop class"""
@ -394,6 +405,15 @@ class TestFdtUtil(unittest.TestCase):
self.assertIn("property 'intval' has length 4, expecting 1",
str(e.exception))
def testGetPhandleList(self):
dtb = fdt.FdtScan('tools/dtoc/dtoc_test_phandle.dts')
node = dtb.GetNode('/phandle-source2')
self.assertEqual([1], fdt_util.GetPhandleList(node, 'clocks'))
node = dtb.GetNode('/phandle-source')
self.assertEqual([1, 2, 11, 3, 12, 13, 1],
fdt_util.GetPhandleList(node, 'clocks'))
self.assertEqual(None, fdt_util.GetPhandleList(node, 'missing'))
def testGetDataType(self):
self.assertEqual(1, fdt_util.GetDatatype(self.node, 'intval', int))
self.assertEqual('message', fdt_util.GetDatatype(self.node, 'stringval',