linux-kernel - [PATCH v3 0/3] regulator: spacemit-p1: Support board power tree via DT properties

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Message-Id: <20260204-spacemit-p1-v3-0-a894b3057026@riscstar.com>
Date: Wed, 04 Feb 2026 21:23:00 +0800
From: Guodong Xu <guodong@...cstar.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Yixun Lan <dlan@...too.org>, Alex Elder <elder@...cstar.com>, 
 Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Troy Mitchell <troy.mitchell@...ux.spacemit.com>, 
 Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, 
 Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>
Cc: linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, devicetree@...r.kernel.org, 
 Guodong Xu <guodong@...cstar.com>
Subject: [PATCH v3 0/3] regulator: spacemit-p1: Support board power tree
 via DT properties

The patch (Patch 1 in v1 and v2) fixing hardware voltage constraints was
applied to regulator.git for-next, so it is dropped from this series.

Patch 1, 2 and 3 (previously 2-4) enables flexible power tree
configurations for the SpacemiT P1 PMIC. Hardcoded supply assumptions
are replaced with explicit devicetree properties. PMIC supply connections
are board-design decisions. Moving this to DT allows supporting varied
topologies without driver modifications.

The supply binding change is an ABI change. The breakage is acceptable:
Yixun Lan checked the DTS tree queued for v6.20 and found no consumers
of the P1/PMIC regulator yet [1]. For the two K1 boards in-tree
(BPI-F3 and Jupiter), initial power settings come from boot firmware and
a probe failure of pmic node "spacemit,p1" has minimal impact.

Link: https://lore.kernel.org/lkml/20260125110333-GYD71302@gentoo.org/ [1]

Changes in v3:
- Drop Patch 1 of previous series, already applied to regulator.git
    for-next (commit 41399c5d4761).
- Patch 1 (previous 2): Mark "vin-supply" as deprecated to avoid
    cross-tree warnings.
- Patch 2 (previous 3): Describe the ABI change explicitly. Add
    justification.
- Link to v2: https://lore.kernel.org/r/20260124-spacemit-p1-v2-0-2c86b06694ba@riscstar.com

Changes in v2:
- Patch 2: dt-bindings, remove providers from the example dts.
- Patch 4: Added the pmic supply properties for K1 Milkv Jupiter.
           Updated the commit message accordingly.
- Link to v1: https://lore.kernel.org/r/20260122-spacemit-p1-v1-0-309be27fbff9@riscstar.com

Signed-off-by: Guodong Xu <guodong@...cstar.com>
---
Guodong Xu (3):
      dt-bindings: mfd: spacemit,p1: Add individual regulator supply properties
      regulator: spacemit-p1: Update supply names
      riscv: dts: spacemit: Update PMIC supply properties for BPI-F3 and Jupiter

 .../devicetree/bindings/mfd/spacemit,p1.yaml       | 53 +++++++++++++++++++++-
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts    | 12 ++++-
 arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts  | 12 ++++-
 drivers/regulator/spacemit-p1.c                    | 25 +++++-----
 4 files changed, 86 insertions(+), 16 deletions(-)
---
base-commit: 5164e95565d3fd508ca8a95351323f5716dfb695
change-id: 20260122-spacemit-p1-ae596efe885f
prerequisite-patch-id: 154bd4f720ce5065d58b988de8f273207b44572e

Best regards,
-- 
Guodong Xu <guodong@...cstar.com>