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dtoc: Tidy up more Python style in dtb_platdata
Update this file to reduce the number of pylint warnings. Also add a few missing comments while we are here. Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
parent
8ee05b5f90
commit
78128d52df
@ -114,8 +114,8 @@ def get_value(ftype, value):
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if ftype == fdt.Type.INT:
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return '%#x' % fdt_util.fdt32_to_cpu(value)
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elif ftype == fdt.Type.BYTE:
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ch = value[0]
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return '%#x' % (ord(ch) if isinstance(ch, str) else ch)
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char = value[0]
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return '%#x' % (ord(char) if isinstance(char, str) else char)
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elif ftype == fdt.Type.STRING:
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# Handle evil ACPI backslashes by adding another backslash before them.
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# So "\\_SB.GPO0" in the device tree effectively stays like that in C
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@ -163,7 +163,7 @@ class DtbPlatdata(object):
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_drivers_additional: List of additional drivers to use during scanning
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"""
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def __init__(self, dtb_fname, include_disabled, warning_disabled,
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drivers_additional=[]):
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drivers_additional=None):
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self._fdt = None
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self._dtb_fname = dtb_fname
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self._valid_nodes = None
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@ -173,7 +173,7 @@ class DtbPlatdata(object):
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self._lines = []
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self._drivers = []
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self._driver_aliases = {}
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self._drivers_additional = drivers_additional
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self._drivers_additional = drivers_additional or []
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def get_normalized_compat_name(self, node):
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"""Get a node's normalized compat name
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@ -312,20 +312,20 @@ class DtbPlatdata(object):
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return PhandleInfo(max_args, args)
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return None
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def scan_driver(self, fn):
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def scan_driver(self, fname):
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"""Scan a driver file to build a list of driver names and aliases
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This procedure will populate self._drivers and self._driver_aliases
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Args
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fn: Driver filename to scan
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fname: Driver filename to scan
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"""
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with open(fn, encoding='utf-8') as fd:
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with open(fname, encoding='utf-8') as inf:
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try:
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buff = fd.read()
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buff = inf.read()
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except UnicodeDecodeError:
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# This seems to happen on older Python versions
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print("Skipping file '%s' due to unicode error" % fn)
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print("Skipping file '%s' due to unicode error" % fname)
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return
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# The following re will search for driver names declared as
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@ -337,8 +337,9 @@ class DtbPlatdata(object):
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# The following re will search for driver aliases declared as
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# U_BOOT_DRIVER_ALIAS(alias, driver_name)
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driver_aliases = re.findall('U_BOOT_DRIVER_ALIAS\(\s*(\w+)\s*,\s*(\w+)\s*\)',
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buff)
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driver_aliases = re.findall(
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'U_BOOT_DRIVER_ALIAS\(\s*(\w+)\s*,\s*(\w+)\s*\)',
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buff)
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for alias in driver_aliases: # pragma: no cover
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if len(alias) != 2:
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@ -354,19 +355,19 @@ class DtbPlatdata(object):
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basedir = sys.argv[0].replace('tools/dtoc/dtoc', '')
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if basedir == '':
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basedir = './'
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for (dirpath, dirnames, filenames) in os.walk(basedir):
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for fn in filenames:
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if not fn.endswith('.c'):
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for (dirpath, _, filenames) in os.walk(basedir):
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for fname in filenames:
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if not fname.endswith('.c'):
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continue
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self.scan_driver(dirpath + '/' + fn)
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self.scan_driver(dirpath + '/' + fname)
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for fn in self._drivers_additional:
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if not isinstance(fn, str) or len(fn) == 0:
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for fname in self._drivers_additional:
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if not isinstance(fname, str) or len(fname) == 0:
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continue
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if fn[0] == '/':
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self.scan_driver(fn)
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if fname[0] == '/':
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self.scan_driver(fname)
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else:
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self.scan_driver(basedir + '/' + fn)
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self.scan_driver(basedir + '/' + fname)
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def scan_dtb(self):
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"""Scan the device tree to obtain a tree of nodes and properties
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@ -422,15 +423,15 @@ class DtbPlatdata(object):
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Number of size cells for this node
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"""
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parent = node.parent
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na, ns = 2, 2
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num_addr, num_size = 2, 2
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if parent:
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na_prop = parent.props.get('#address-cells')
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ns_prop = parent.props.get('#size-cells')
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if na_prop:
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na = fdt_util.fdt32_to_cpu(na_prop.value)
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if ns_prop:
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ns = fdt_util.fdt32_to_cpu(ns_prop.value)
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return na, ns
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addr_prop = parent.props.get('#address-cells')
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size_prop = parent.props.get('#size-cells')
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if addr_prop:
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num_addr = fdt_util.fdt32_to_cpu(addr_prop.value)
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if size_prop:
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num_size = fdt_util.fdt32_to_cpu(size_prop.value)
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return num_addr, num_size
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def scan_reg_sizes(self):
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"""Scan for 64-bit 'reg' properties and update the values
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@ -443,8 +444,8 @@ class DtbPlatdata(object):
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reg = node.props.get('reg')
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if not reg:
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continue
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na, ns = self.get_num_cells(node)
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total = na + ns
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num_addr, num_size = self.get_num_cells(node)
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total = num_addr + num_size
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if reg.type != fdt.Type.INT:
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raise ValueError("Node '%s' reg property is not an int" %
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@ -453,10 +454,10 @@ class DtbPlatdata(object):
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raise ValueError(
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"Node '%s' reg property has %d cells "
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'which is not a multiple of na + ns = %d + %d)' %
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(node.name, len(reg.value), na, ns))
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reg.na = na
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reg.ns = ns
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if na != 1 or ns != 1:
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(node.name, len(reg.value), num_addr, num_size))
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reg.num_addr = num_addr
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reg.num_size = num_size
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if num_addr != 1 or num_size != 1:
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reg.type = fdt.Type.INT64
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i = 0
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new_value = []
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@ -464,10 +465,10 @@ class DtbPlatdata(object):
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if not isinstance(val, list):
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val = [val]
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while i < len(val):
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addr = fdt_util.fdt_cells_to_cpu(val[i:], reg.na)
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i += na
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size = fdt_util.fdt_cells_to_cpu(val[i:], reg.ns)
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i += ns
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addr = fdt_util.fdt_cells_to_cpu(val[i:], reg.num_addr)
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i += num_addr
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size = fdt_util.fdt_cells_to_cpu(val[i:], reg.num_size)
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i += num_size
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new_value += [addr, size]
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reg.value = new_value
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@ -513,14 +514,12 @@ class DtbPlatdata(object):
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else:
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structs[node_name] = fields
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upto = 0
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for node in self._valid_nodes:
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node_name, _ = self.get_normalized_compat_name(node)
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struct = structs[node_name]
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for name, prop in node.props.items():
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if name not in PROP_IGNORE_LIST and name[0] != '#':
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prop.Widen(struct[name])
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upto += 1
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return structs
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@ -613,12 +612,10 @@ class DtbPlatdata(object):
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if info:
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# Process the list as pairs of (phandle, id)
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pos = 0
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item = 0
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for args in info.args:
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phandle_cell = prop.value[pos]
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phandle = fdt_util.fdt32_to_cpu(phandle_cell)
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target_node = self._fdt.phandle_to_node[phandle]
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name = conv_name_to_c(target_node.name)
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arg_values = []
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for i in range(args):
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arg_values.append(
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@ -626,7 +623,6 @@ class DtbPlatdata(object):
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pos += 1 + args
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vals.append('\t{%d, {%s}}' % (target_node.idx,
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', '.join(arg_values)))
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item += 1
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for val in vals:
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self.buf('\n\t\t%s,' % val)
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else:
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@ -714,7 +710,7 @@ class DtbPlatdata(object):
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self.out(''.join(self.get_buf()))
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def run_steps(args, dtb_file, include_disabled, output, warning_disabled=False,
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drivers_additional=[]):
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drivers_additional=None):
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"""Run all the steps of the dtoc tool
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Args:
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@ -722,13 +718,18 @@ def run_steps(args, dtb_file, include_disabled, output, warning_disabled=False,
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dtb_file (str): Filename of dtb file to process
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include_disabled (bool): True to include disabled nodes
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output (str): Name of output file
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warning_disabled (bool): True to avoid showing warnings about missing
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drivers
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_drivers_additional (list): List of additional drivers to use during
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scanning
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Raises:
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ValueError: if args has no command, or an unknown command
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"""
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if not args:
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raise ValueError('Please specify a command: struct, platdata')
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plat = DtbPlatdata(dtb_file, include_disabled, warning_disabled, drivers_additional)
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plat = DtbPlatdata(dtb_file, include_disabled, warning_disabled,
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drivers_additional)
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plat.scan_drivers()
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plat.scan_dtb()
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plat.scan_tree()
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