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[RFC,v3,0/2] pmdomain: core: add support for domain hierarchies in DT

Message ID 20250613-pmdomain-hierarchy-onecell-v3-0-5c770676fce7@baylibre.com
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Series pmdomain: core: add support for domain hierarchies in DT | expand

Message

Kevin Hilman June 13, 2025, 10:39 p.m. UTC 
Currently, PM domains can only support hierarchy for simple
providers (e.g. ones with #power-domain-cells = 0).

Add more generic support by adding support for a nexus node map, as
described in section 2.5.1 of the DT spec.

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
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Changes in v3:
- use of_parse_phandle_with_args_map() instead of custom parsing
- probe when device is attatched to PM domain
- Link to v2: https://lore.kernel.org/r/20250528-pmdomain-hierarchy-onecell-v2-0-7885ae45e59c@baylibre.com

Changes in v2:
- Use nexus map instead of creating new property as suggested by Rob H.
- Link to v1: https://lore.kernel.org/r/20250528-pmdomain-hierarchy-onecell-v1-1-851780700c68@baylibre.com

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Kevin Hilman (2):
      dt-bindings: power: add nexus map for power-domains
      pmdomain: core: add support for subdomains using power-domain-map

 Documentation/devicetree/bindings/power/power-domain.yaml | 35 +++++++++++++++++++++++++++++++++++
 drivers/pmdomain/core.c                                   | 24 ++++++++++++++++++++++--
 2 files changed, 57 insertions(+), 2 deletions(-)
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base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca
change-id: 20250528-pmdomain-hierarchy-onecell-a46fad47d855

Best regards,