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scripts: kconfig: add dt_compat_on_bus() helper

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This can be used from Kconfig to detect if any enabled nodes of a
compatible are on a bus. This can be useful if a compatible might
appear on multiple buses, to enable them by default from application
code without having to change prj.conf settings depending on what's in
the devicetree.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This commit is contained in:
Martí Bolívar 2020-04-10 15:37:58 -07:00 • committed by Kumar Gala
commit 3cd4f6c224
1 changed files with 16 additions and 0 deletions
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16
scripts/kconfig/kconfigfunctions.py
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@ -317,6 +317,21 @@ def dt_compat_enabled(kconf, _, compat):
return "n"
def dt_compat_on_bus(kconf, _, compat, bus):
"""
This function takes a 'compat' and returns "y" if we find an "enabled"
compatible node in the EDT which is on bus 'bus'. It returns "n" otherwise.
"""
if doc_mode or edt is None:
return "n"
for node in edt.compat2enabled[compat]:
if node.on_bus is not None and node.on_bus == bus:
return "y"
return "n"
def dt_nodelabel_has_compat(kconf, _, label, compat):
"""
This function takes a 'label' and returns "y" if an "enabled" node with
@ -349,6 +364,7 @@ def shields_list_contains(kconf, _, shield):
functions = {
"dt_compat_enabled": (dt_compat_enabled, 1, 1),
"dt_compat_on_bus": (dt_compat_on_bus, 2, 2),
"dt_chosen_label": (dt_chosen_label, 1, 1),
"dt_chosen_enabled": (dt_chosen_enabled, 1, 1),
"dt_nodelabel_enabled": (dt_nodelabel_enabled, 1, 1),