checkpatch.pl: Bogus case of DT_SPLIT_BINDING_PATCH

[Jonathan Neuschäfer]

Hi,

I've encountered a case where the DT_SPLIT_BINDING_PATCH warning was
emitted even though I didn't change anything outside of Documentation/
devicetree/bindings. I just converted a binding from plain text to YAML.

Here's a transcript of checkpatch (from Linux 5.11-rc1)'s output:

  $ scripts/checkpatch.pl --strict patches-wpcm/0001-dt-bindings-arm-Convert-nuvoton-npcm750-binding-to-Y.patch
  WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
  #31:
  deleted file mode 100644
  
  WARNING: DT binding docs and includes should be a separate patch. See: Documentation/devicetree/bindings/submitting-patches.rst
  
  WARNING: DT binding docs and includes should be a separate patch. See: Documentation/devicetree/bindings/submitting-patches.rst
  
  total: 0 errors, 3 warnings, 0 checks, 21 lines checked
  
  NOTE: For some of the reported defects, checkpatch may be able to
        mechanically convert to the typical style using --fix or --fix-inplace.
  
  patches-wpcm/0001-dt-bindings-arm-Convert-nuvoton-npcm750-binding-to-Y.patch has style problems, please review.
  
  NOTE: If any of the errors are false positives, please report
        them to the maintainer, see CHECKPATCH in MAINTAINERS.


I attached the patch, for reference.


Best regards,
Jonathan Neuschäfer
From 3aaf23345633070909e23a05a9f92748e445b3b3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= <j.neuschaefer@xxxxxxx>
Date: Mon, 28 Dec 2020 01:09:31 +0100
Subject: [PATCH 01/11] dt-bindings: arm: Convert nuvoton,npcm750 binding to
 YAML
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The general trend is to have devicetree bindings in YAML format, to
allow automatic validation of bindings and devicetrees.

Convert the NPCM SoC family's binding to YAML before extending it.

The nuvoton,npcm750-evb compatible string is introduced to keep the
structure of the binding a little simpler.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>
---

If someone else (e.g. Brendan Higgins) wants to be listed as the
maintainer, please let me know.
---
 .../devicetree/bindings/arm/npcm/npcm.txt     |  6 ------
 .../devicetree/bindings/arm/npcm/npcm.yaml    | 21 +++++++++++++++++++
 2 files changed, 21 insertions(+), 6 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/arm/npcm/npcm.txt
 create mode 100644 Documentation/devicetree/bindings/arm/npcm/npcm.yaml

diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.txt b/Documentation/devicetree/bindings/arm/npcm/npcm.txt
deleted file mode 100644
index 2d87d9ecea85b..0000000000000
--- a/Documentation/devicetree/bindings/arm/npcm/npcm.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-NPCM Platforms Device Tree Bindings
------------------------------------
-NPCM750 SoC
-Required root node properties:
-	- compatible = "nuvoton,npcm750";
-
diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.yaml b/Documentation/devicetree/bindings/arm/npcm/npcm.yaml
new file mode 100644
index 0000000000000..3ecd00803c003
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/npcm/npcm.yaml
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/npcm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NPCM Platforms Device Tree Bindings
+
+maintainers:
+  - Jonathan Neuschäfer <j.neuschaefer@xxxxxxx>
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: NPCM750 based boards
+        items:
+          - enum:
+            - nuvoton,npcm750-evb           # NPCM750 evaluation board
+          - const: nuvoton,npcm750
-- 
2.29.2

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