linux-kernel - [PATCH v3 0/7] dt-bindings: mfd: syscon: Document more compatibles and require simpe-mfd description

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Message-Id: <20240626-dt-bindings-mfd-syscon-split-v3-0-3409903bb99b@linaro.org>
Date: Wed, 26 Jun 2024 12:09:09 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Orson Zhai <orsonzhai@...il.com>, 
 Baolin Wang <baolin.wang@...ux.alibaba.com>, 
 Chunyan Zhang <zhang.lyra@...il.com>, Jacky Huang <ychuang3@...oton.com>, 
 Shan-Chun Hung <schung@...oton.com>, 
 Khuong Dinh <khuong@...amperecomputing.com>, Lee Jones <lee@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Chuanhua Lei <lchuanhua@...linear.com>, 
 Rahul Tanwar <rtanwar@...linear.com>, 
 Lars Povlsen <lars.povlsen@...rochip.com>, 
 Steen Hegelund <Steen.Hegelund@...rochip.com>, 
 Daniel Machon <daniel.machon@...rochip.com>, UNGLinuxDriver@...rochip.com, 
 Nishanth Menon <nm@...com>, Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Jiaxun Yang <jiaxun.yang@...goat.com>, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 Conor Dooley <conor.dooley@...rochip.com>, 
 Rahul Tanwar <rahul.tanwar@...ux.intel.com>, 
 Amireddy Mallikarjuna reddy <mallikarjunax.reddy@...el.com>, 
 "Zhu, Yi Xin" <Yixin.zhu@...el.com>, Maxime Ripard <mripard@...nel.org>
Subject: [PATCH v3 0/7] dt-bindings: mfd: syscon: Document more compatibles
 and require simpe-mfd description

Hi,

Dependency
==========
Rebased on Lee's MFD tree, because dependency is there already:
https://lore.kernel.org/all/171828959006.2643902.8308227314531523435.b4-ty@kernel.org/

Merging
=======
Preferrably everything via MFD tree (file/context dependencies).

Changes in v3
=============
- Add tags
- intel,lgm-syscon: change maintainers (email bounce)
- syscon/Split: drop unneeded |, use const instead of enum in select:
- Link to v2: https://lore.kernel.org/r/20240616-dt-bindings-mfd-syscon-split-v2-0-571b5850174a@linaro.org

Changes in v2
=============
- Add acks
- lgm-syscon: add ranges to binding and example
- syscon.yaml: add big select with all compatibles for older dtschema
- Link to v1: https://lore.kernel.org/r/20240519-dt-bindings-mfd-syscon-split-v1-0-aaf996e2313a@linaro.org

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@...nel.org>
To: Rob Herring <robh@...nel.org>
To: Krzysztof Kozlowski <krzk+dt@...nel.org>
To: Conor Dooley <conor+dt@...nel.org>
To: Lars Povlsen <lars.povlsen@...rochip.com>
To: Steen Hegelund <Steen.Hegelund@...rochip.com>
To: Daniel Machon <daniel.machon@...rochip.com>
To: UNGLinuxDriver@...rochip.com
To: Nishanth Menon <nm@...com>
To: Matthias Brugger <matthias.bgg@...il.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-mediatek@...ts.infradead.org

---
Krzysztof Kozlowski (7):
      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

 .../devicetree/bindings/mfd/syscon-common.yaml     |  71 +++++
 Documentation/devicetree/bindings/mfd/syscon.yaml  | 306 ++++++++++++---------
 .../bindings/soc/intel/intel,lgm-syscon.yaml       |  57 ++++
 .../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 +++
 6 files changed, 457 insertions(+), 123 deletions(-)
---
base-commit: 8dc7c29f608649f3d9eca826e9d4fe4b8a32c472
change-id: 20240517-dt-bindings-mfd-syscon-split-37e23996523d

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>