diff options
Diffstat (limited to 'tools/dtoc/dtb_platdata.py')
| -rw-r--r-- | tools/dtoc/dtb_platdata.py | 138 |
1 files changed, 86 insertions, 52 deletions
diff --git a/tools/dtoc/dtb_platdata.py b/tools/dtoc/dtb_platdata.py index 579a6749c4..9b27aecc14 100644 --- a/tools/dtoc/dtb_platdata.py +++ b/tools/dtoc/dtb_platdata.py @@ -54,6 +54,13 @@ VAL_PREFIX = 'dtv_' # phandles is len(args). This is a list of integers. PhandleInfo = collections.namedtuple('PhandleInfo', ['max_args', 'args']) +# Holds a single phandle link, allowing a C struct value to be assigned to point +# to a device +# +# var_node: C variable to assign (e.g. 'dtv_mmc.clocks[0].node') +# dev_name: Name of device to assign to (e.g. 'clock') +PhandleLink = collections.namedtuple('PhandleLink', ['var_node', 'dev_name']) + def conv_name_to_c(name): """Convert a device-tree name to a C identifier @@ -136,7 +143,8 @@ class DtbPlatdata(object): Properties: _fdt: Fdt object, referencing the device tree _dtb_fname: Filename of the input device tree binary file - _valid_nodes: A list of Node object with compatible strings + _valid_nodes: A list of Node object with compatible strings. The list + is ordered by conv_name_to_c(node.name) _include_disabled: true to include nodes marked status = "disabled" _outfile: The current output file (sys.stdout or a real file) _warning_disabled: true to disable warnings about driver names not found @@ -146,7 +154,6 @@ class DtbPlatdata(object): key: Driver alias declared with U_BOOT_DRIVER_ALIAS(driver_alias, driver_name) value: Driver name declared with U_BOOT_DRIVER(driver_name) - _links: List of links to be included in dm_populate_phandle_data() _drivers_additional: List of additional drivers to use during scanning """ def __init__(self, dtb_fname, include_disabled, warning_disabled, @@ -160,7 +167,6 @@ class DtbPlatdata(object): self._lines = [] self._drivers = [] self._driver_aliases = {} - self._links = [] self._drivers_additional = drivers_additional def get_normalized_compat_name(self, node): @@ -359,23 +365,24 @@ class DtbPlatdata(object): """ self._fdt = fdt.FdtScan(self._dtb_fname) - def scan_node(self, root): + def scan_node(self, root, valid_nodes): """Scan a node and subnodes to build a tree of node and phandle info This adds each node to self._valid_nodes. Args: root: Root node for scan + valid_nodes: List of Node objects to add to """ for node in root.subnodes: if 'compatible' in node.props: status = node.props.get('status') if (not self._include_disabled and not status or status.value != 'disabled'): - self._valid_nodes.append(node) + valid_nodes.append(node) # recurse to handle any subnodes - self.scan_node(node) + self.scan_node(node, valid_nodes) def scan_tree(self): """Scan the device tree for useful information @@ -384,8 +391,12 @@ class DtbPlatdata(object): _valid_nodes: A list of nodes we wish to consider include in the platform data """ - self._valid_nodes = [] - return self.scan_node(self._fdt.GetRoot()) + valid_nodes = [] + self.scan_node(self._fdt.GetRoot(), valid_nodes) + self._valid_nodes = sorted(valid_nodes, + key=lambda x: conv_name_to_c(x.name)) + for idx, node in enumerate(self._valid_nodes): + node.idx = idx @staticmethod def get_num_cells(node): @@ -458,8 +469,15 @@ class DtbPlatdata(object): Once the widest property is determined, all other properties are updated to match that width. + + Returns: + dict containing structures: + key (str): Node name, as a C identifier + value: dict containing structure fields: + key (str): Field name + value: Prop object with field information """ - structs = {} + structs = collections.OrderedDict() for node in self._valid_nodes: node_name, _ = self.get_normalized_compat_name(node) fields = {} @@ -528,6 +546,14 @@ class DtbPlatdata(object): This writes out the body of a header file consisting of structure definitions for node in self._valid_nodes. See the documentation in doc/driver-model/of-plat.rst for more information. + + Args: + structs: dict containing structures: + key (str): Node name, as a C identifier + value: dict containing structure fields: + key (str): Field name + value: Prop object with field information + """ self.out_header() self.out('#include <stdbool.h>\n') @@ -560,8 +586,51 @@ class DtbPlatdata(object): Args: node: node to output """ + def _output_list(node, prop): + """Output the C code for a devicetree property that holds a list + + Args: + node (fdt.Node): Node to output + prop (fdt.Prop): Prop to output + """ + self.buf('{') + vals = [] + # For phandles, output a reference to the platform data + # of the target node. + info = self.get_phandle_argc(prop, node.name) + if info: + # Process the list as pairs of (phandle, id) + pos = 0 + item = 0 + for args in info.args: + phandle_cell = prop.value[pos] + phandle = fdt_util.fdt32_to_cpu(phandle_cell) + target_node = self._fdt.phandle_to_node[phandle] + name = conv_name_to_c(target_node.name) + arg_values = [] + for i in range(args): + arg_values.append( + str(fdt_util.fdt32_to_cpu(prop.value[pos + 1 + i]))) + pos += 1 + args + vals.append('\t{%d, {%s}}' % (target_node.idx, + ', '.join(arg_values))) + item += 1 + for val in vals: + self.buf('\n\t\t%s,' % val) + else: + for val in prop.value: + vals.append(get_value(prop.type, val)) + + # Put 8 values per line to avoid very long lines. + for i in range(0, len(vals), 8): + if i: + self.buf(',\n\t\t') + self.buf(', '.join(vals[i:i + 8])) + self.buf('}') + struct_name, _ = self.get_normalized_compat_name(node) var_name = conv_name_to_c(node.name) + self.buf('/* Node %s index %d */\n' % (node.path, node.idx)) self.buf('static struct %s%s %s%s = {\n' % (STRUCT_PREFIX, struct_name, VAL_PREFIX, var_name)) for pname in sorted(node.props): @@ -573,46 +642,7 @@ class DtbPlatdata(object): # Special handling for lists if isinstance(prop.value, list): - self.buf('{') - vals = [] - # For phandles, output a reference to the platform data - # of the target node. - info = self.get_phandle_argc(prop, node.name) - if info: - # Process the list as pairs of (phandle, id) - pos = 0 - item = 0 - for args in info.args: - phandle_cell = prop.value[pos] - phandle = fdt_util.fdt32_to_cpu(phandle_cell) - target_node = self._fdt.phandle_to_node[phandle] - name = conv_name_to_c(target_node.name) - arg_values = [] - for i in range(args): - arg_values.append(str(fdt_util.fdt32_to_cpu(prop.value[pos + 1 + i]))) - pos += 1 + args - # node member is filled with NULL as the real value - # will be update at run-time during dm_init_and_scan() - # by dm_populate_phandle_data() - vals.append('\t{NULL, {%s}}' % (', '.join(arg_values))) - var_node = '%s%s.%s[%d].node' % \ - (VAL_PREFIX, var_name, member_name, item) - # Save the the link information to be use to define - # dm_populate_phandle_data() - self._links.append({'var_node': var_node, 'dev_name': name}) - item += 1 - for val in vals: - self.buf('\n\t\t%s,' % val) - else: - for val in prop.value: - vals.append(get_value(prop.type, val)) - - # Put 8 values per line to avoid very long lines. - for i in range(0, len(vals), 8): - if i: - self.buf(',\n\t\t') - self.buf(', '.join(vals[i:i + 8])) - self.buf('}') + _output_list(node, prop) else: self.buf(get_value(prop.type, prop.value)) self.buf(',\n') @@ -623,6 +653,10 @@ class DtbPlatdata(object): self.buf('\t.name\t\t= "%s",\n' % struct_name) self.buf('\t.platdata\t= &%s%s,\n' % (VAL_PREFIX, var_name)) self.buf('\t.platdata_size\t= sizeof(%s%s),\n' % (VAL_PREFIX, var_name)) + idx = -1 + if node.parent and node.parent in self._valid_nodes: + idx = node.parent.idx + self.buf('\t.parent_idx\t= %d,\n' % idx) self.buf('};\n') self.buf('\n') @@ -639,6 +673,9 @@ class DtbPlatdata(object): information. """ self.out_header() + self.out('/* Allow use of U_BOOT_DEVICE() in this file */\n') + self.out('#define DT_PLATDATA_C\n') + self.out('\n') self.out('#include <common.h>\n') self.out('#include <dm.h>\n') self.out('#include <dt-structs.h>\n') @@ -660,9 +697,6 @@ class DtbPlatdata(object): # nodes using DM_GET_DEVICE # dtv_dmc_at_xxx.clocks[0].node = DM_GET_DEVICE(clock_controller_at_xxx) self.buf('void dm_populate_phandle_data(void) {\n') - for l in self._links: - self.buf('\t%s = DM_GET_DEVICE(%s);\n' % - (l['var_node'], l['dev_name'])) self.buf('}\n') self.out(''.join(self.get_buf())) |