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pylibfdt: Allow reading integer values from properties

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Extend the Properties class with some functions to read a single integer
property. Add a new getprop_obj() function to return a Property object
instead of the raw data.

This suggested approach can be extended to handle other types, as well as
arrays.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Simon Glass 2018-06-12 23:37:31 -06:00 • committed by David Gibson
parent 49d32ce40b
commit 3c374d46ac
4 changed files with 43 additions and 3 deletions
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12
tests/pylibfdt_tests.py
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@ -102,6 +102,7 @@ class PyLibfdtTests(unittest.TestCase):
def setUp(self):
"""Read in the device tree we use for testing"""
self.fdt = _ReadFdt('test_tree1.dtb')
self.fdt2 = _ReadFdt('test_props.dtb')
def GetPropList(self, node_path):
"""Read a list of properties from a node
@ -368,6 +369,17 @@ class PyLibfdtTests(unittest.TestCase):
node2 = self.fdt.path_offset('/subnode@2/subsubnode@0')
self.assertEquals(node2, self.fdt.node_offset_by_phandle(0x2001))
def get_prop(self, name):
return self.fdt2.getprop(0, name)
def testGetIntProperties(self):
"""Test that we can access properties as integers"""
self.assertEquals(0xdeadbeef, self.get_prop("prop-hex32").as_uint32())
self.assertEquals(123, self.get_prop("prop-uint32").as_uint32())
self.assertEquals(-2, self.get_prop("prop-int32").as_int32())
self.assertEquals(9223372036854775807,
self.get_prop("prop-uint64").as_uint64())
self.assertEquals(-2, self.get_prop("prop-int64").as_int64())
def testReserveMap(self):
"""Test that we can access the memory reserve map"""