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>
diff --git a/cmake/extensions.cmake b/cmake/extensions.cmake
index 9746fb1..5564d47 100644
--- a/cmake/extensions.cmake
+++ b/cmake/extensions.cmake
@@ -2855,6 +2855,60 @@
endif()
endfunction()
+# Usage:
+#
+# dt_comp_path(<var> COMPATIBLE <compatible> [INDEX <idx>])
+#
+# Get a list of paths for the nodes with the given compatible. The value will
+# be returned in the <var> parameter.
+# <var> will be undefined if no such compatible exists.
+#
+# For details and considerations about the format of <path> and the returned
+# parameter refer to dt_prop().
+#
+# <var> : Return variable where the property value will be stored
+# COMPATIBLE <compatible>: Compatible for which the list of paths should be
+# returned, as it appears in the DTS source
+# INDEX <idx> : Optional index when retrieving a value in an array property
+
+function(dt_comp_path var)
+ set(req_single_args "COMPATIBLE")
+ set(single_args "INDEX")
+ cmake_parse_arguments(DT_COMP "" "${req_single_args};${single_args}" "" ${ARGN})
+
+ if(${ARGV0} IN_LIST req_single_args)
+ message(FATAL_ERROR "dt_comp_path(${ARGV0} ...) missing return parameter.")
+ endif()
+
+ foreach(arg ${req_single_args})
+ if(NOT DEFINED DT_COMP_${arg})
+ message(FATAL_ERROR "dt_comp_path(${ARGV0} ...) "
+ "missing required argument: ${arg}"
+ )
+ endif()
+ endforeach()
+
+ get_property(exists TARGET devicetree_target
+ PROPERTY "DT_COMP|${DT_COMP_COMPATIBLE}"
+ SET
+ )
+
+ if(NOT exists)
+ set(${var} PARENT_SCOPE)
+ return()
+ endif()
+
+ get_target_property(val devicetree_target
+ "DT_COMP|${DT_COMP_COMPATIBLE}"
+ )
+
+ if(DEFINED DT_COMP_INDEX)
+ list(GET val ${DT_COMP_INDEX} element)
+ set(${var} "${element}" PARENT_SCOPE)
+ else()
+ set(${var} "${val}" PARENT_SCOPE)
+ endif()
+endfunction()
# Usage:
# dt_num_regs(<var> PATH <path>)
diff --git a/scripts/dts/gen_dts_cmake.py b/scripts/dts/gen_dts_cmake.py
index f86d2a8..8afc598 100755
--- a/scripts/dts/gen_dts_cmake.py
+++ b/scripts/dts/gen_dts_cmake.py
@@ -43,6 +43,7 @@
import os
import pickle
import sys
+from collections import defaultdict
sys.path.append(os.path.join(os.path.dirname(__file__), 'python-devicetree',
'src'))
@@ -95,6 +96,7 @@
for alias in node.aliases:
cmake_props.append(f'"DT_ALIAS|{alias}" "{path}"')
+ compatible2paths = defaultdict(list)
for node in edt.nodes:
cmake_props.append(f'"DT_NODE|{node.path}" TRUE')
@@ -117,6 +119,11 @@
cmake_prop = f'DT_PROP|{node.path}|{item}'
cmake_props.append(f'"{cmake_prop}" "{cmake_value}"')
+ if item == 'compatible':
+ # compatibles is always an array
+ for comp in node.props[item].val:
+ compatible2paths[comp].append(node.path)
+
if node.regs is not None:
cmake_props.append(f'"DT_REG|{node.path}|NUM" "{len(node.regs)}"')
cmake_addr = ''
@@ -136,6 +143,14 @@
cmake_props.append(f'"DT_REG|{node.path}|ADDR" "{cmake_addr}"')
cmake_props.append(f'"DT_REG|{node.path}|SIZE" "{cmake_size}"')
+ for comp in compatible2paths.keys():
+ cmake_path = ''
+ for path in compatible2paths[comp]:
+ cmake_path = f'{cmake_path}{path};'
+
+ cmake_comp = f'DT_COMP|{comp}'
+ cmake_props.append(f'"{cmake_comp}" "{cmake_path}"')
+
with open(args.cmake_out, "w", encoding="utf-8") as cmake_file:
print('add_custom_target(devicetree_target)', file=cmake_file)
print(file=cmake_file)
