cmake: dts: Add dt_comp_path() cmake function
Add a new cmake extension function: dt_comp_path(<var> COMPATIBLE <compatible> [INDEX <idx>]) to get a list of paths for the nodes with the given <compatible>. This is useful when we have to cycle through several nodes with the same compatible. Signed-off-by: Carlo Caione <ccaione@baylibre.com>
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@ -2855,6 +2855,60 @@ function(dt_prop var)
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endif()
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endfunction()
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# Usage:
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#
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# dt_comp_path(<var> COMPATIBLE <compatible> [INDEX <idx>])
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#
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# Get a list of paths for the nodes with the given compatible. The value will
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# be returned in the <var> parameter.
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# <var> will be undefined if no such compatible exists.
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#
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# For details and considerations about the format of <path> and the returned
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# parameter refer to dt_prop().
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#
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# <var> : Return variable where the property value will be stored
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# COMPATIBLE <compatible>: Compatible for which the list of paths should be
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# returned, as it appears in the DTS source
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# INDEX <idx> : Optional index when retrieving a value in an array property
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function(dt_comp_path var)
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set(req_single_args "COMPATIBLE")
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set(single_args "INDEX")
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cmake_parse_arguments(DT_COMP "" "${req_single_args};${single_args}" "" ${ARGN})
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if(${ARGV0} IN_LIST req_single_args)
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message(FATAL_ERROR "dt_comp_path(${ARGV0} ...) missing return parameter.")
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endif()
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foreach(arg ${req_single_args})
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if(NOT DEFINED DT_COMP_${arg})
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message(FATAL_ERROR "dt_comp_path(${ARGV0} ...) "
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"missing required argument: ${arg}"
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)
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endif()
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endforeach()
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get_property(exists TARGET devicetree_target
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PROPERTY "DT_COMP|${DT_COMP_COMPATIBLE}"
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SET
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)
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if(NOT exists)
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set(${var} PARENT_SCOPE)
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return()
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endif()
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get_target_property(val devicetree_target
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"DT_COMP|${DT_COMP_COMPATIBLE}"
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)
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if(DEFINED DT_COMP_INDEX)
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list(GET val ${DT_COMP_INDEX} element)
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set(${var} "${element}" PARENT_SCOPE)
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else()
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set(${var} "${val}" PARENT_SCOPE)
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endif()
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endfunction()
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# Usage:
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# dt_num_regs(<var> PATH <path>)
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@ -43,6 +43,7 @@ import argparse
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import os
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import pickle
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import sys
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from collections import defaultdict
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sys.path.append(os.path.join(os.path.dirname(__file__), 'python-devicetree',
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'src'))
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@ -95,6 +96,7 @@ def main():
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for alias in node.aliases:
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cmake_props.append(f'"DT_ALIAS|{alias}" "{path}"')
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compatible2paths = defaultdict(list)
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for node in edt.nodes:
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cmake_props.append(f'"DT_NODE|{node.path}" TRUE')
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@ -117,6 +119,11 @@ def main():
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cmake_prop = f'DT_PROP|{node.path}|{item}'
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cmake_props.append(f'"{cmake_prop}" "{cmake_value}"')
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if item == 'compatible':
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# compatibles is always an array
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for comp in node.props[item].val:
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compatible2paths[comp].append(node.path)
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if node.regs is not None:
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cmake_props.append(f'"DT_REG|{node.path}|NUM" "{len(node.regs)}"')
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cmake_addr = ''
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@ -136,6 +143,14 @@ def main():
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cmake_props.append(f'"DT_REG|{node.path}|ADDR" "{cmake_addr}"')
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cmake_props.append(f'"DT_REG|{node.path}|SIZE" "{cmake_size}"')
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for comp in compatible2paths.keys():
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cmake_path = ''
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for path in compatible2paths[comp]:
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cmake_path = f'{cmake_path}{path};'
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cmake_comp = f'DT_COMP|{comp}'
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cmake_props.append(f'"{cmake_comp}" "{cmake_path}"')
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with open(args.cmake_out, "w", encoding="utf-8") as cmake_file:
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print('add_custom_target(devicetree_target)', file=cmake_file)
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print(file=cmake_file)
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