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pylibfdt: Add support for fdt_get_alias()

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Add this into the class to simplify use of this function.

Signed-off-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Message-Id: <1562130487-27028-1-git-send-email-appana.durga.rao@xilinx.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Appana Durga Kedareswara rao 2019-07-03 10:38:07 +05:30 • committed by David Gibson
parent 1c17714dbb
commit d6de81b81b
2 changed files with 19 additions and 0 deletions
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12
pylibfdt/libfdt.i
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@ -431,6 +431,18 @@ class FdtRo(object):
""" """
return fdt_get_phandle(self._fdt, nodeoffset) return fdt_get_phandle(self._fdt, nodeoffset)
def get_alias(self, name):
"""Get the full path referenced by a given alias
Args:
name: name of the alias to lookup
Returns:
Full path to the node for the alias named 'name', if it exists
None, if the given alias or the /aliases node does not exist
"""
return fdt_get_alias(self._fdt, name)
def parent_offset(self, nodeoffset, quiet=()): def parent_offset(self, nodeoffset, quiet=()):
"""Get the offset of a node's parent """Get the offset of a node's parent

7
tests/pylibfdt_tests.py
View file

@ -77,6 +77,7 @@ class PyLibfdtBasicTests(unittest.TestCase):
"""Read in the device tree we use for testing""" """Read in the device tree we use for testing"""
self.fdt = _ReadFdt('test_tree1.dtb') self.fdt = _ReadFdt('test_tree1.dtb')
self.fdt2 = _ReadFdt('test_props.dtb') self.fdt2 = _ReadFdt('test_props.dtb')
self.fdt3 = _ReadFdt('aliases.dtb')
def GetPropList(self, node_path): def GetPropList(self, node_path):
"""Read a list of properties from a node """Read a list of properties from a node
@ -340,6 +341,12 @@ class PyLibfdtBasicTests(unittest.TestCase):
node2 = self.fdt.path_offset('/subnode@2') node2 = self.fdt.path_offset('/subnode@2')
self.assertEquals(0x2000, self.fdt.get_phandle(node2)) self.assertEquals(0x2000, self.fdt.get_phandle(node2))
def testGetAlias(self):
"""Test for the get_alias() method"""
self.assertEquals("/subnode@1", self.fdt3.get_alias('s1'))
self.assertEquals("/subnode@1/subsubnode", self.fdt3.get_alias('ss1'))
self.assertEquals("/subnode@1/subsubnode/subsubsubnode", self.fdt3.get_alias('sss1'))
def testParentOffset(self): def testParentOffset(self):
"""Test for the parent_offset() method""" """Test for the parent_offset() method"""
self.assertEquals(-libfdt.NOTFOUND, self.assertEquals(-libfdt.NOTFOUND,