linux-kernel - [PATCH RFC v2 0/2] pmdomains: core: add support for domain hierarchies in DT

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Message-Id: <20250528-pmdomain-hierarchy-onecell-v2-0-7885ae45e59c@baylibre.com>
Date: Wed, 28 May 2025 14:58:50 -0700
From: Kevin Hilman <khilman@...libre.com>
To: Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, arm-scmi@...r.kernel.org
Subject: [PATCH RFC v2 0/2] pmdomains: core: add support for domain
 hierarchies in DT

Currently, PM domains can only support hierarchy for simple
providers (e.g. ones with #power-domain-cells = 0).

Add support for oncell providers as well 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@...libre.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

---
Kevin Hilman (2):
      dt-bindings: power: add nexus map for power-domains
      pmdomain: core: use DT map to support hierarchy

 Documentation/devicetree/bindings/power/power-domain.yaml |  35 ++++++++++++++++++++
 drivers/pmdomain/core.c                                   | 166 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 201 insertions(+)
---
base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca
change-id: 20250528-pmdomain-hierarchy-onecell-a46fad47d855

Best regards,
-- 
Kevin Hilman <khilman@...libre.com>