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@ -12,6 +12,17 @@ |
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%{ |
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#define SWIG_FILE_WITH_INIT |
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#include "libfdt.h" |
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/* |
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* We rename this function here to avoid problems with swig, since we also have |
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* a struct called fdt_property. That struct causes swig to create a class in |
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* libfdt.py called fdt_property(), which confuses things. |
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*/ |
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static int _fdt_property(void *fdt, const char *name, const char *val, int len) |
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{ |
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return fdt_property(fdt, name, val, len); |
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} |
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%} |
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%pythoncode %{ |
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@ -108,6 +119,7 @@ def check_err_null(val, quiet=()): |
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raise FdtException(val) |
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return val |
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class Fdt: |
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"""Device tree class, supporting all operations |
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@ -129,6 +141,163 @@ class Fdt: |
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self._fdt = bytearray(data) |
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check_err(fdt_check_header(self._fdt)); |
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def as_bytearray(self): |
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"""Get the device tree contents as a bytearray |
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This can be passed directly to libfdt functions that access a |
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const void * for the device tree. |
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Returns: |
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bytearray containing the device tree |
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""" |
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return bytearray(self._fdt) |
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def next_node(self, nodeoffset, depth, quiet=()): |
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"""Find the next subnode |
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Args: |
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nodeoffset: Node offset of previous node |
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depth: On input, the depth of the node at nodeoffset. On output, the |
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depth of the returned node |
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quiet: Errors to ignore (empty to raise on all errors) |
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Returns: |
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The offset of the next node, if any |
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Raises: |
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FdtException if no more nodes found or other error occurs |
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""" |
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return check_err(fdt_next_node(self._fdt, nodeoffset, depth), quiet) |
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def first_subnode(self, nodeoffset, quiet=()): |
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"""Find the first subnode of a parent node |
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Args: |
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nodeoffset: Node offset of parent node |
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quiet: Errors to ignore (empty to raise on all errors) |
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Returns: |
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The offset of the first subnode, if any |
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Raises: |
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FdtException if no subnodes found or other error occurs |
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""" |
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return check_err(fdt_first_subnode(self._fdt, nodeoffset), quiet) |
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def next_subnode(self, nodeoffset, quiet=()): |
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"""Find the next subnode |
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Args: |
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nodeoffset: Node offset of previous subnode |
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quiet: Errors to ignore (empty to raise on all errors) |
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Returns: |
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The offset of the next subnode, if any |
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Raises: |
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FdtException if no more subnodes found or other error occurs |
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""" |
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return check_err(fdt_next_subnode(self._fdt, nodeoffset), quiet) |
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def magic(self): |
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"""Return the magic word from the header |
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Returns: |
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Magic word |
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""" |
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return fdt_magic(self._fdt) & 0xffffffff |
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def totalsize(self): |
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"""Return the total size of the device tree |
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Returns: |
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Total tree size in bytes |
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""" |
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return check_err(fdt_totalsize(self._fdt)) |
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def off_dt_struct(self): |
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"""Return the start of the device-tree struct area |
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Returns: |
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Start offset of struct area |
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""" |
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return check_err(fdt_off_dt_struct(self._fdt)) |
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def off_dt_strings(self): |
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"""Return the start of the device-tree string area |
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Returns: |
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Start offset of string area |
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""" |
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return check_err(fdt_off_dt_strings(self._fdt)) |
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def off_mem_rsvmap(self): |
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"""Return the start of the memory reserve map |
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Returns: |
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Start offset of memory reserve map |
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""" |
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return check_err(fdt_off_mem_rsvmap(self._fdt)) |
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def version(self): |
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"""Return the version of the device tree |
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Returns: |
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Version number of the device tree |
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""" |
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return check_err(fdt_version(self._fdt)) |
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def last_comp_version(self): |
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"""Return the last compatible version of the device tree |
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Returns: |
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Last compatible version number of the device tree |
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""" |
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return check_err(fdt_last_comp_version(self._fdt)) |
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def boot_cpuid_phys(self): |
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"""Return the physical boot CPU ID |
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Returns: |
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Physical boot CPU ID |
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""" |
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return check_err(fdt_boot_cpuid_phys(self._fdt)) |
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def size_dt_strings(self): |
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"""Return the start of the device-tree string area |
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Returns: |
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Start offset of string area |
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""" |
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return check_err(fdt_size_dt_strings(self._fdt)) |
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def size_dt_struct(self): |
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"""Return the start of the device-tree struct area |
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Returns: |
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Start offset of struct area |
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""" |
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return check_err(fdt_size_dt_struct(self._fdt)) |
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def num_mem_rsv(self, quiet=()): |
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"""Return the number of memory reserve-map records |
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Returns: |
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Number of memory reserve-map records |
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""" |
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return check_err(fdt_num_mem_rsv(self._fdt), quiet) |
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def get_mem_rsv(self, index, quiet=()): |
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"""Return the indexed memory reserve-map record |
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Args: |
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index: Record to return (0=first) |
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Returns: |
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Number of memory reserve-map records |
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""" |
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return check_err(fdt_get_mem_rsv(self._fdt, index), quiet) |
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def subnode_offset(self, parentoffset, name, quiet=()): |
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"""Get the offset of a named subnode |
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@ -161,6 +330,20 @@ class Fdt: |
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""" |
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return check_err(fdt_path_offset(self._fdt, path), quiet) |
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def get_name(self, nodeoffset): |
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"""Get the name of a node |
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Args: |
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nodeoffset: Offset of node to check |
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Returns: |
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Node name |
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Raises: |
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FdtException on error (e.g. nodeoffset is invalid) |
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""" |
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return check_err_null(fdt_get_name(self._fdt, nodeoffset))[0] |
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def first_property_offset(self, nodeoffset, quiet=()): |
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"""Get the offset of the first property in a node offset |
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@ -195,20 +378,6 @@ class Fdt: |
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return check_err(fdt_next_property_offset(self._fdt, prop_offset), |
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quiet) |
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def get_name(self, nodeoffset): |
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"""Get the name of a node |
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Args: |
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nodeoffset: Offset of node to check |
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Returns: |
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Node name |
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Raises: |
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FdtException on error (e.g. nodeoffset is invalid) |
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""" |
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return check_err_null(fdt_get_name(self._fdt, nodeoffset))[0] |
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def get_property_by_offset(self, prop_offset, quiet=()): |
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"""Obtains a property that can be examined |
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@ -229,51 +398,59 @@ class Fdt: |
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return pdata |
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return Property(pdata[0], pdata[1]) |
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def first_subnode(self, nodeoffset, quiet=()): |
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"""Find the first subnode of a parent node |
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def get_property(self, nodeoffset, prop_name, quiet=()): |
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"""Obtains a property by name |
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Args: |
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nodeoffset: Node offset of parent node |
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nodeoffset: Offset to the node to check |
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prop_name: Name of property to get |
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quiet: Errors to ignore (empty to raise on all errors) |
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Returns: |
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The offset of the first subnode, if any |
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Property object, or None if not found |
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Raises: |
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FdtException if no subnode found or other error occurs |
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FdtException on error (e.g. invalid prop_offset or device |
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tree format) |
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""" |
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return check_err(fdt_first_subnode(self._fdt, nodeoffset), quiet) |
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pdata = check_err_null( |
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fdt_get_property(self._fdt, nodeoffset, prop_name), quiet) |
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if isinstance(pdata, (int)): |
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return pdata |
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return Property(pdata[0], pdata[1]) |
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def next_subnode(self, nodeoffset, quiet=()): |
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"""Find the next subnode |
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@staticmethod |
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def create_empty_tree(size, quiet=()): |
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"""Create an empty device tree ready for use |
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Args: |
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nodeoffset: Node offset of previous subnode |
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quiet: Errors to ignore (empty to raise on all errors) |
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size: Size of device tree in bytes |
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Returns: |
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The offset of the next subnode, if any |
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Raises: |
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FdtException if no more subnode found or other error occurs |
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Fdt object containing the device tree |
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""" |
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return check_err(fdt_next_subnode(self._fdt, nodeoffset), quiet) |
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data = bytearray(size) |
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err = check_err(fdt_create_empty_tree(data, size), quiet) |
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if err: |
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return err |
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return Fdt(data) |
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def totalsize(self): |
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"""Return the total size of the device tree |
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def open_into(self, size, quiet=()): |
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"""Move the device tree into a larger or smaller space |
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Returns: |
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Total tree size in bytes |
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""" |
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return check_err(fdt_totalsize(self._fdt)) |
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def off_dt_struct(self): |
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"""Return the start of the device tree struct area |
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This creates a new device tree of size @size and moves the existing |
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device tree contents over to that. It can be used to create more space |
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in a device tree. |
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Returns: |
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Start offset of struct area |
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Args: |
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size: Required new size of device tree in bytes |
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""" |
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return check_err(fdt_off_dt_struct(self._fdt)) |
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fdt = bytearray(size) |
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fdt[:len(self._fdt)] = self._fdt |
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err = check_err(fdt_open_into(self._fdt, fdt, size), quiet) |
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if err: |
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return err |
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self._fdt = fdt |
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def pack(self, quiet=()): |
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"""Pack the device tree to remove unused space |
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@ -286,22 +463,34 @@ class Fdt: |
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Raises: |
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FdtException if any error occurs |
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""" |
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return check_err(fdt_pack(self._fdt), quiet) |
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err = check_err(fdt_pack(self._fdt), quiet) |
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if err: |
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return err |
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del self._fdt[self.totalsize():] |
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return err |
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def delprop(self, nodeoffset, prop_name): |
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"""Delete a property from a node |
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def getprop(self, nodeoffset, prop_name, quiet=()): |
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"""Get a property from a node |
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Args: |
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nodeoffset: Node offset containing property to delete |
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prop_name: Name of property to delete |
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nodeoffset: Node offset containing property to get |
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prop_name: Name of property to get |
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quiet: Errors to ignore (empty to raise on all errors) |
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Returns: |
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Value of property as a string, or -ve error number |
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Raises: |
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FdtError if the property does not exist, or another error occurs |
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FdtError if any error occurs (e.g. the property is not found) |
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""" |
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return check_err(fdt_delprop(self._fdt, nodeoffset, prop_name)) |
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pdata = check_err_null(fdt_getprop(self._fdt, nodeoffset, prop_name), |
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quiet) |
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if isinstance(pdata, (int)): |
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return pdata |
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return str(pdata[0]) |
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def getprop(self, nodeoffset, prop_name, quiet=()): |
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"""Get a property from a node |
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def getprop_obj(self, nodeoffset, prop_name, quiet=()): |
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"""Get a property from a node as a Property object |
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Args: |
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nodeoffset: Node offset containing property to get |
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@ -309,7 +498,7 @@ class Fdt: |
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quiet: Errors to ignore (empty to raise on all errors) |
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Returns: |
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Value of property as a bytearray, or -ve error number |
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Property object, or None if not found |
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Raises: |
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FdtError if any error occurs (e.g. the property is not found) |
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@ -317,8 +506,8 @@ class Fdt: |
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|
|
pdata = check_err_null(fdt_getprop(self._fdt, nodeoffset, prop_name), |
|
|
|
|
quiet) |
|
|
|
|
if isinstance(pdata, (int)): |
|
|
|
|
return pdata |
|
|
|
|
return bytearray(pdata[0]) |
|
|
|
|
return None |
|
|
|
|
return Property(prop_name, bytearray(pdata[0])) |
|
|
|
|
|
|
|
|
|
def get_phandle(self, nodeoffset): |
|
|
|
|
"""Get the phandle of a node |
|
|
|
|
@ -347,6 +536,108 @@ class Fdt: |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_parent_offset(self._fdt, nodeoffset), quiet) |
|
|
|
|
|
|
|
|
|
def set_name(self, nodeoffset, name, quiet=()): |
|
|
|
|
"""Set the name of a node |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
nodeoffset: Node offset of node to update |
|
|
|
|
name: New node name |
|
|
|
|
|
|
|
|
|
Returns: |
|
|
|
|
Error code, or 0 if OK |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no parent found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_set_name(self._fdt, nodeoffset, name), quiet) |
|
|
|
|
|
|
|
|
|
def setprop(self, nodeoffset, prop_name, val, quiet=()): |
|
|
|
|
"""Set the value of a property |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
nodeoffset: Node offset containing the property to create/update |
|
|
|
|
prop_name: Name of property |
|
|
|
|
val: Value to write (string or bytearray) |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Returns: |
|
|
|
|
Error code, or 0 if OK |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no parent found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_setprop(self._fdt, nodeoffset, prop_name, val, |
|
|
|
|
len(val)), quiet) |
|
|
|
|
|
|
|
|
|
def setprop_u32(self, nodeoffset, prop_name, val, quiet=()): |
|
|
|
|
"""Set the value of a property |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
nodeoffset: Node offset containing the property to create/update |
|
|
|
|
prop_name: Name of property |
|
|
|
|
val: Value to write (integer) |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Returns: |
|
|
|
|
Error code, or 0 if OK |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no parent found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_setprop_u32(self._fdt, nodeoffset, prop_name, val), |
|
|
|
|
quiet) |
|
|
|
|
|
|
|
|
|
def setprop_u64(self, nodeoffset, prop_name, val, quiet=()): |
|
|
|
|
"""Set the value of a property |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
nodeoffset: Node offset containing the property to create/update |
|
|
|
|
prop_name: Name of property |
|
|
|
|
val: Value to write (integer) |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Returns: |
|
|
|
|
Error code, or 0 if OK |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no parent found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_setprop_u64(self._fdt, nodeoffset, prop_name, val), |
|
|
|
|
quiet) |
|
|
|
|
|
|
|
|
|
def setprop_str(self, nodeoffset, prop_name, val, quiet=()): |
|
|
|
|
"""Set the string value of a property |
|
|
|
|
|
|
|
|
|
The property is set to the string, with a nul terminator added |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
nodeoffset: Node offset containing the property to create/update |
|
|
|
|
prop_name: Name of property |
|
|
|
|
val: Value to write (string without nul terminator) |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Returns: |
|
|
|
|
Error code, or 0 if OK |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no parent found or other error occurs |
|
|
|
|
""" |
|
|
|
|
val += '\0' |
|
|
|
|
return check_err(fdt_setprop(self._fdt, nodeoffset, prop_name, |
|
|
|
|
val, len(val)), quiet) |
|
|
|
|
|
|
|
|
|
def delprop(self, nodeoffset, prop_name): |
|
|
|
|
"""Delete a property from a node |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
nodeoffset: Node offset containing property to delete |
|
|
|
|
prop_name: Name of property to delete |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtError if the property does not exist, or another error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_delprop(self._fdt, nodeoffset, prop_name)) |
|
|
|
|
|
|
|
|
|
def node_offset_by_phandle(self, phandle, quiet=()): |
|
|
|
|
"""Get the offset of a node with the given phandle |
|
|
|
|
|
|
|
|
|
@ -362,7 +653,19 @@ class Fdt: |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_node_offset_by_phandle(self._fdt, phandle), quiet) |
|
|
|
|
|
|
|
|
|
class Property: |
|
|
|
|
def del_node(self, nodeoffset): |
|
|
|
|
"""Delete a node |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
nodeoffset: Node offset containing property to delete |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtError if the node does not exist, or another error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_del_node(self._fdt, nodeoffset)) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class Property(bytearray): |
|
|
|
|
"""Holds a device tree property name and value. |
|
|
|
|
|
|
|
|
|
This holds a copy of a property taken from the device tree. It does not |
|
|
|
|
@ -371,11 +674,274 @@ class Property: |
|
|
|
|
|
|
|
|
|
Properties: |
|
|
|
|
name: Property name |
|
|
|
|
value: Proper value as a bytearray |
|
|
|
|
value: Property value as a bytearray |
|
|
|
|
""" |
|
|
|
|
def __init__(self, name, value): |
|
|
|
|
bytearray.__init__(self, value) |
|
|
|
|
self.name = name |
|
|
|
|
self.value = value |
|
|
|
|
|
|
|
|
|
def as_cell(self, fmt): |
|
|
|
|
return struct.unpack('>' + fmt, self)[0] |
|
|
|
|
|
|
|
|
|
def as_uint32(self): |
|
|
|
|
return self.as_cell('L') |
|
|
|
|
|
|
|
|
|
def as_int32(self): |
|
|
|
|
return self.as_cell('l') |
|
|
|
|
|
|
|
|
|
def as_uint64(self): |
|
|
|
|
return self.as_cell('Q') |
|
|
|
|
|
|
|
|
|
def as_int64(self): |
|
|
|
|
return self.as_cell('q') |
|
|
|
|
|
|
|
|
|
def as_str(self): |
|
|
|
|
return self[:-1] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class FdtSw(object): |
|
|
|
|
"""Software interface to create a device tree from scratch |
|
|
|
|
|
|
|
|
|
The methods in this class work by adding to an existing 'partial' device |
|
|
|
|
tree buffer of a fixed size created by instantiating this class. When the |
|
|
|
|
tree is complete, call finish() to complete the device tree so that it can |
|
|
|
|
be used. |
|
|
|
|
|
|
|
|
|
Similarly with nodes, a new node is started with begin_node() and finished |
|
|
|
|
with end_node(). |
|
|
|
|
|
|
|
|
|
The context manager functions can be used to make this a bit easier: |
|
|
|
|
|
|
|
|
|
# First create the device tree with a node and property: |
|
|
|
|
with FdtSw(small_size) as sw: |
|
|
|
|
with sw.AddNode('node'): |
|
|
|
|
sw.property_u32('reg', 2) |
|
|
|
|
fdt = sw.AsFdt() |
|
|
|
|
|
|
|
|
|
# Now we can use it as a real device tree |
|
|
|
|
fdt.setprop_u32(0, 'reg', 3) |
|
|
|
|
""" |
|
|
|
|
def __init__(self, size, quiet=()): |
|
|
|
|
fdtrw = bytearray(size) |
|
|
|
|
err = check_err(fdt_create(fdtrw, size)) |
|
|
|
|
if err: |
|
|
|
|
return err |
|
|
|
|
self._fdtrw = fdtrw |
|
|
|
|
|
|
|
|
|
def __enter__(self): |
|
|
|
|
"""Contact manager to use to create a device tree via software""" |
|
|
|
|
return self |
|
|
|
|
|
|
|
|
|
def __exit__(self, type, value, traceback): |
|
|
|
|
check_err(fdt_finish(self._fdtrw)) |
|
|
|
|
|
|
|
|
|
def AsFdt(self): |
|
|
|
|
"""Convert a FdtSw into an Fdt so it can be accessed as normal |
|
|
|
|
|
|
|
|
|
Note that finish() must be called before this function will work. If |
|
|
|
|
you are using the context manager (see 'with' code in the FdtSw class |
|
|
|
|
comment) then this will happen automatically. |
|
|
|
|
|
|
|
|
|
Returns: |
|
|
|
|
Fdt object allowing access to the newly created device tree |
|
|
|
|
""" |
|
|
|
|
return Fdt(self._fdtrw) |
|
|
|
|
|
|
|
|
|
def resize(self, size, quiet=()): |
|
|
|
|
"""Resize the buffer to accommodate a larger tree |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
size: New size of tree |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
fdt = bytearray(size) |
|
|
|
|
fdt[:len(self._fdtrw)] = self._fdtrw |
|
|
|
|
err = check_err(fdt_resize(self._fdtrw, fdt, size), quiet) |
|
|
|
|
if err: |
|
|
|
|
return err |
|
|
|
|
self._fdtrw = fdt |
|
|
|
|
|
|
|
|
|
def add_reservemap_entry(self, addr, size, quiet=()): |
|
|
|
|
"""Add a new memory reserve map entry |
|
|
|
|
|
|
|
|
|
Once finished adding, you must call finish_reservemap(). |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
addr: 64-bit start address |
|
|
|
|
size: 64-bit size |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_add_reservemap_entry(self._fdtrw, addr, size), |
|
|
|
|
quiet) |
|
|
|
|
|
|
|
|
|
def finish_reservemap(self, quiet=()): |
|
|
|
|
"""Indicate that there are no more reserve map entries to add |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_finish_reservemap(self._fdtrw), quiet) |
|
|
|
|
|
|
|
|
|
def begin_node(self, name, quiet=()): |
|
|
|
|
"""Begin a new node |
|
|
|
|
|
|
|
|
|
Use this before adding properties to the node. Then call end_node() to |
|
|
|
|
finish it. You can also use the context manager as shown in the FdtSw |
|
|
|
|
class comment. |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
name: Name of node to begin |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_begin_node(self._fdtrw, name), quiet) |
|
|
|
|
|
|
|
|
|
def property_string(self, name, string, quiet=()): |
|
|
|
|
"""Add a property with a string value |
|
|
|
|
|
|
|
|
|
The string will be nul-terminated when written to the device tree |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
name: Name of property to add |
|
|
|
|
string: String value of property |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_property_string(self._fdtrw, name, string), quiet) |
|
|
|
|
|
|
|
|
|
def property_u32(self, name, val, quiet=()): |
|
|
|
|
"""Add a property with a 32-bit value |
|
|
|
|
|
|
|
|
|
Write a single-cell value to the device tree |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
name: Name of property to add |
|
|
|
|
val: Value of property |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_property_u32(self._fdtrw, name, val), quiet) |
|
|
|
|
|
|
|
|
|
def property_u64(self, name, val, quiet=()): |
|
|
|
|
"""Add a property with a 64-bit value |
|
|
|
|
|
|
|
|
|
Write a double-cell value to the device tree in big-endian format |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
name: Name of property to add |
|
|
|
|
val: Value of property |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_property_u64(self._fdtrw, name, val), quiet) |
|
|
|
|
|
|
|
|
|
def property_cell(self, name, val, quiet=()): |
|
|
|
|
"""Add a property with a single-cell value |
|
|
|
|
|
|
|
|
|
Write a single-cell value to the device tree |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
name: Name of property to add |
|
|
|
|
val: Value of property |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_property_cell(self._fdtrw, name, val), quiet) |
|
|
|
|
|
|
|
|
|
def property(self, name, val, quiet=()): |
|
|
|
|
"""Add a property |
|
|
|
|
|
|
|
|
|
Write a new property with the given value to the device tree. The value |
|
|
|
|
is taken as is and is not nul-terminated |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
name: Name of property to add |
|
|
|
|
val: Value of property |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(_fdt_property(self._fdtrw, name, val, len(val)), quiet) |
|
|
|
|
|
|
|
|
|
def end_node(self, quiet=()): |
|
|
|
|
"""End a node |
|
|
|
|
|
|
|
|
|
Use this after adding properties to a node to close it off. You can also |
|
|
|
|
use the context manager as shown in the FdtSw class comment. |
|
|
|
|
|
|
|
|
|
Args: |
|
|
|
|
quiet: Errors to ignore (empty to raise on all errors) |
|
|
|
|
|
|
|
|
|
Raises: |
|
|
|
|
FdtException if no node found or other error occurs |
|
|
|
|
""" |
|
|
|
|
return check_err(fdt_end_node(self._fdtrw), quiet) |
|
|
|
|
|
|
|
|
|
def finish(self, quiet=()): |
|
|
|
|
"""Finish writing the device tree |
|
|
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This closes off the device tree ready for use |
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Args: |
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quiet: Errors to ignore (empty to raise on all errors) |
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Raises: |
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FdtException if no node found or other error occurs |
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""" |
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return check_err(fdt_finish(self._fdtrw), quiet) |
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def AddNode(self, name): |
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"""Create a new context for adding a node |
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When used in a 'with' clause this starts a new node and finishes it |
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afterward. |
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Args: |
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name: Name of node to add |
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""" |
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return NodeAdder(self._fdtrw, name) |
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class NodeAdder(): |
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"""Class to provide a node context |
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This allows you to add nodes in a more natural way: |
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with fdtsw.AddNode('name'): |
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fdtsw.property_string('test', 'value') |
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The node is automatically completed with a call to end_node() when the |
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context exits. |
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""" |
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def __init__(self, fdt, name): |
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self._fdt = fdt |
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self._name = name |
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def __enter__(self): |
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check_err(fdt_begin_node(self._fdt, self._name)) |
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def __exit__(self, type, value, traceback): |
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check_err(fdt_end_node(self._fdt)) |
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%} |
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%rename(fdt_property) fdt_property_func; |
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@ -408,6 +974,7 @@ typedef int fdt32_t; |
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fdt = fdt; /* avoid unused variable warning */ |
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} |
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/* typemap used for fdt_get_property_by_offset() */ |
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%typemap(out) (struct fdt_property *) { |
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PyObject *buff; |
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@ -430,6 +997,44 @@ typedef int fdt32_t; |
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$result = Py_BuildValue("s#", $1, *arg4); |
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} |
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/* typemap used for fdt_setprop() */ |
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%typemap(in) (const void *val) { |
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$1 = PyString_AsString($input); /* char *str */ |
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} |
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/* typemap used for fdt_add_reservemap_entry() */ |
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%typemap(in) uint64_t { |
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$1 = PyLong_AsUnsignedLong($input); |
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} |
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/* typemaps used for fdt_next_node() */ |
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%typemap(in, numinputs=1) int *depth (int depth) { |
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depth = (int) PyInt_AsLong($input); |
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$1 = &depth; |
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} |
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%typemap(argout) int *depth { |
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PyObject *val = Py_BuildValue("i", *arg$argnum); |
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resultobj = SWIG_Python_AppendOutput(resultobj, val); |
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} |
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%apply int *depth { int *depth }; |
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/* typemaps for fdt_get_mem_rsv */ |
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%typemap(in, numinputs=0) uint64_t * (uint64_t temp) { |
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$1 = &temp; |
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} |
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%typemap(argout) uint64_t * { |
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PyObject *val = PyLong_FromUnsignedLong(*arg$argnum); |
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if (!result) { |
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if (PyTuple_GET_SIZE(resultobj) == 0) |
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resultobj = val; |
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else |
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resultobj = SWIG_Python_AppendOutput(resultobj, val); |
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} |
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} |
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/* We have both struct fdt_property and a function fdt_property() */ |
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%warnfilter(302) fdt_property; |
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@ -444,5 +1049,13 @@ int fdt_last_comp_version(const void *fdt); |
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int fdt_boot_cpuid_phys(const void *fdt); |
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int fdt_size_dt_strings(const void *fdt); |
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int fdt_size_dt_struct(const void *fdt); |
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int fdt_property_string(void *fdt, const char *name, const char *val); |
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int fdt_property_cell(void *fdt, const char *name, uint32_t val); |
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/* |
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* This function has a stub since the name fdt_property is used for both a |
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* function and a struct, which confuses SWIG. |
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*/ |
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int _fdt_property(void *fdt, const char *name, const char *val, int len); |
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%include <../libfdt/libfdt.h> |
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Tom Rini
6 years ago