[PATCH RFC v5 0/2] pmdomain: core: add support for domain hierarchies in DT
From: "Kevin Hilman (TI)" <khilman@baylibre.com>
Date: 2026-01-23 01:14:11
Also in:
arm-scmi, linux-devicetree, linux-pm, lkml
Currently, PM domains can only support hierarchy for simple providers (e.g. ones with #power-domain-cells = 0). Add more generic support by creating an of_genpd helper which can parse a nexus node map, and create domain hierarchy. Signed-off-by: Kevin Hilman (TI) <khilman@baylibre.com> --- Changes in v5: - update subdomain language to parent/child - add remove function to remove all children - if any children in the map fail to add, remove them all - Link to v4: https://patch.msgid.link/20251119-pmdomain-hierarchy-onecell-v4-0-f25a1d5022f8@baylibre.com Changes in v4: - use new OF iterator for parsing map. See: https://lore.kernel.org/r/20251119-topic-lpm-of-map-iterator-v6-18-v1-1-1f0075d771a3@baylibre.com (local) - instead of mapping on probe, create of_genpd helper to be called by providers - Link to v3: https://lore.kernel.org/r/20250613-pmdomain-hierarchy-onecell-v3-0-5c770676fce7@baylibre.com (local) 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 (local) 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 (local) --- Kevin Hilman (TI) (2): pmdomain: core: support domain hierarchy via power-domain-map pmdomain: arm_scmi: add support for domain hierarchies drivers/pmdomain/arm/scmi_pm_domain.c | 5 +++++ drivers/pmdomain/core.c | 160 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/pm_domain.h | 16 ++++++++++++++++ 3 files changed, 181 insertions(+) --- base-commit: 3e7f562e20ee87a25e104ef4fce557d39d62fa85 change-id: 20250528-pmdomain-hierarchy-onecell-a46fad47d855 prerequisite-change-id: 20251119-topic-lpm-of-map-iterator-v6-18-a61447423adc:v2 prerequisite-patch-id: e5697df059c17cf967fa6e4b1edb70874fee4ad3 Best regards, -- Kevin Hilman (TI) [off-list ref]