diff options
| -rw-r--r-- | tools/dtoc/dtb_platdata.py | 125 |
1 files changed, 63 insertions, 62 deletions
diff --git a/tools/dtoc/dtb_platdata.py b/tools/dtoc/dtb_platdata.py index de4a88b..a1f32e1 100644 --- a/tools/dtoc/dtb_platdata.py +++ b/tools/dtoc/dtb_platdata.py @@ -72,6 +72,60 @@ def tab_to(num_tabs, line): return line + ' ' return line + '\t' * (num_tabs - len(line) // 8) +def get_value(ftype, value): + """Get a value as a C expression + + For integers this returns a byte-swapped (little-endian) hex string + For bytes this returns a hex string, e.g. 0x12 + For strings this returns a literal string enclosed in quotes + For booleans this return 'true' + + Args: + type: Data type (fdt_util) + value: Data value, as a string of bytes + """ + if ftype == fdt.TYPE_INT: + return '%#x' % fdt_util.fdt32_to_cpu(value) + elif ftype == fdt.TYPE_BYTE: + return '%#x' % ord(value[0]) + elif ftype == fdt.TYPE_STRING: + return '"%s"' % value + elif ftype == fdt.TYPE_BOOL: + return 'true' + +def get_compat_name(node): + """Get a node's first compatible string as a C identifier + + Args: + node: Node object to check + Return: + Tuple: + C identifier for the first compatible string + List of C identifiers for all the other compatible strings + (possibly empty) + """ + compat = node.props['compatible'].value + aliases = [] + if isinstance(compat, list): + compat, aliases = compat[0], compat[1:] + return conv_name_to_c(compat), [conv_name_to_c(a) for a in aliases] + +def is_phandle(prop): + """Check if a node contains phandles + + We have no reliable way of detecting whether a node uses a phandle + or not. As an interim measure, use a list of known property names. + + Args: + prop: Prop object to check + Return: + True if the object value contains phandles, else False + """ + if prop.name in ['clocks']: + return True + return False + + class DtbPlatdata(object): """Provide a means to convert device tree binary data to platform data @@ -139,43 +193,6 @@ class DtbPlatdata(object): self._lines = [] return lines - @staticmethod - def get_value(ftype, value): - """Get a value as a C expression - - For integers this returns a byte-swapped (little-endian) hex string - For bytes this returns a hex string, e.g. 0x12 - For strings this returns a literal string enclosed in quotes - For booleans this return 'true' - - Args: - type: Data type (fdt_util) - value: Data value, as a string of bytes - """ - if ftype == fdt.TYPE_INT: - return '%#x' % fdt_util.fdt32_to_cpu(value) - elif ftype == fdt.TYPE_BYTE: - return '%#x' % ord(value[0]) - elif ftype == fdt.TYPE_STRING: - return '"%s"' % value - elif ftype == fdt.TYPE_BOOL: - return 'true' - - @staticmethod - def get_compat_name(node): - """Get a node's first compatible string as a C identifier - - Args: - node: Node object to check - Return: - C identifier for the first compatible string - """ - compat = node.props['compatible'].value - aliases = [] - if isinstance(compat, list): - compat, aliases = compat[0], compat[1:] - return conv_name_to_c(compat), [conv_name_to_c(a) for a in aliases] - def scan_dtb(self): """Scan the device tree to obtain a tree of notes and properties @@ -219,22 +236,6 @@ class DtbPlatdata(object): self._valid_nodes = [] return self.scan_node(self._fdt.GetRoot()) - @staticmethod - def is_phandle(prop): - """Check if a node contains phandles - - We have no reliable way of detecting whether a node uses a phandle - or not. As an interim measure, use a list of known property names. - - Args: - prop: Prop object to check - Return: - True if the object value contains phandles, else False - """ - if prop.name in ['clocks']: - return True - return False - def scan_structs(self): """Scan the device tree building up the C structures we will use. @@ -248,7 +249,7 @@ class DtbPlatdata(object): """ structs = {} for node in self._valid_nodes: - node_name, _ = self.get_compat_name(node) + node_name, _ = get_compat_name(node) fields = {} # Get a list of all the valid properties in this node. @@ -272,14 +273,14 @@ class DtbPlatdata(object): upto = 0 for node in self._valid_nodes: - node_name, _ = self.get_compat_name(node) + node_name, _ = get_compat_name(node) struct = structs[node_name] for name, prop in node.props.items(): if name not in PROP_IGNORE_LIST and name[0] != '#': prop.Widen(struct[name]) upto += 1 - struct_name, aliases = self.get_compat_name(node) + struct_name, aliases = get_compat_name(node) for alias in aliases: self._aliases[alias] = struct_name @@ -302,7 +303,7 @@ class DtbPlatdata(object): if pname in PROP_IGNORE_LIST or pname[0] == '#': continue if isinstance(prop.value, list): - if self.is_phandle(prop): + if is_phandle(prop): # Process the list as pairs of (phandle, id) value_it = iter(prop.value) for phandle_cell, _ in zip(value_it, value_it): @@ -326,7 +327,7 @@ class DtbPlatdata(object): self.out('struct %s%s {\n' % (STRUCT_PREFIX, name)) for pname in sorted(structs[name]): prop = structs[name][pname] - if self.is_phandle(prop): + if is_phandle(prop): # For phandles, include a reference to the target self.out('\t%s%s[%d]' % (tab_to(2, 'struct phandle_2_cell'), conv_name_to_c(prop.name), @@ -350,7 +351,7 @@ class DtbPlatdata(object): Args: node: node to output """ - struct_name, _ = self.get_compat_name(node) + struct_name, _ = get_compat_name(node) var_name = conv_name_to_c(node.name) self.buf('static struct %s%s %s%s = {\n' % (STRUCT_PREFIX, struct_name, VAL_PREFIX, var_name)) @@ -366,7 +367,7 @@ class DtbPlatdata(object): vals = [] # For phandles, output a reference to the platform data # of the target node. - if self.is_phandle(prop): + if is_phandle(prop): # Process the list as pairs of (phandle, id) value_it = iter(prop.value) for phandle_cell, id_cell in zip(value_it, value_it): @@ -377,11 +378,11 @@ class DtbPlatdata(object): vals.append('{&%s%s, %d}' % (VAL_PREFIX, name, id_num)) else: for val in prop.value: - vals.append(self.get_value(prop.type, val)) + vals.append(get_value(prop.type, val)) self.buf(', '.join(vals)) self.buf('}') else: - self.buf(self.get_value(prop.type, prop.value)) + self.buf(get_value(prop.type, prop.value)) self.buf(',\n') self.buf('};\n') |