[PATCH 0/8] dt-bindings: mfd: syscon: Document more compatibles and require simpe-mfd description

[Krzysztof Kozlowski]

Hi,

Dependency
==========
Depends on https://lore.kernel.org/r/20240510123018.3902184-1-robh@kernel.org
because it touches the same lines.

Merging
=======
1. Bindings: preferrably everything via MFD tree (file/context dependencies).
2. DTS: via subarch maintainers (no dependencies).

Description/problem
===================
Simple syscon nodes can be documented in common syscon.yaml, however
devices with simple-mfd compatible, thus some children, should have
their own schema listing these children.  Such listing makes the binding
specific, allows better validation (so the incorrect child would not
appear in the simple-mfd node) and actually enforces repeated rule for
simple-mfd devices:

  "simple-mfd" is only for simple devices, where the children do not
  depend on the parent.

Currently the syscon+simple-mfd binding is quite broad and allows
any child or property, thus above rule cannot be enforced.

Solution
========
1. Split the syscon.yaml binding into common syscon properties, used
   potentially by many bindings, and only simple syscon devices (NO
   simple-mfd!).
2. Move some known simple-mfd bindings from syscon.yaml to dedicated
   files.

This patchset might introduce new dtbs_check warnings for devices having
simple-mfd and being part of syscon.yaml previously. I fixed some of
them, but probably not all.

Best regards,
Krzysztof

To: Lee Jones <lee at kernel.org>
To: Rob Herring <robh at kernel.org>
To: Krzysztof Kozlowski <krzk+dt at kernel.org>
To: Conor Dooley <conor+dt at kernel.org>
To: Lars Povlsen <lars.povlsen at microchip.com>
To: Steen Hegelund <Steen.Hegelund at microchip.com>
To: Daniel Machon <daniel.machon at microchip.com>
To: UNGLinuxDriver at microchip.com
To: Nishanth Menon <nm at ti.com>
To: Matthias Brugger <matthias.bgg at gmail.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Cc: devicetree at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-mediatek at lists.infradead.org

---
Krzysztof Kozlowski (8):
      dt-bindings: mfd: syscon: Drop hwlocks
      dt-bindings: soc: sprd: sc9863a-glbregs: Document SC9863A syscon
      dt-bindings: soc: intel: lgm-syscon: Move to dedicated schema
      dt-bindings: soc: microchip: sparx5-cpu-syscon: Move to dedicated schema
      dt-bindings: soc: ti: am654-serdes-ctrl: Move to dedicated schema
      dt-bindings: mfd: syscon: Split and enforce documenting MFD children
      dt-bindings: mfd: syscon: Add APM poweroff mailbox
      arm64: dts: apm: Add dedicated syscon poweroff compatibles

 .../devicetree/bindings/mfd/syscon-common.yaml     |  72 +++++++
 Documentation/devicetree/bindings/mfd/syscon.yaml  | 222 +++++++++------------
 .../bindings/soc/intel/intel,lgm-syscon.yaml       |  53 +++++
 .../soc/microchip/microchip,sparx5-cpu-syscon.yaml |  49 +++++
 .../bindings/soc/sprd/sprd,sc9863a-glbregs.yaml    |  55 +++++
 .../bindings/soc/ti/ti,am654-serdes-ctrl.yaml      |  42 ++++
 arch/arm64/boot/dts/apm/apm-merlin.dts             |   2 +-
 arch/arm64/boot/dts/apm/apm-mustang.dts            |   2 +-
 8 files changed, 365 insertions(+), 132 deletions(-)
---
base-commit: ca42fd4fd365cbaf798f17f655aee3d8192829f3
change-id: 20240517-dt-bindings-mfd-syscon-split-37e23996523d

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>