[PATCH 01/24] Documentation: DT: document compatible string existence requirement

[Paul Walmsley]

DT maintainers require all compatible strings used in chip or board
DTS file to be previously documented somewhere in
Documentation/devicetree/bindings, per:

http://marc.info/?l=linux-tegra&m=142201349727836&w=2

Document this requirement in the DT patch submission requirements
text file.

Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
Cc: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Paul Walmsley <pwalmsley@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 .../devicetree/bindings/submitting-patches.txt     |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/submitting-patches.txt b/Documentation/devicetree/bindings/submitting-patches.txt
index b7ba01ad1426..4b2bbb6047c4 100644
--- a/Documentation/devicetree/bindings/submitting-patches.txt
+++ b/Documentation/devicetree/bindings/submitting-patches.txt
@@ -15,6 +15,14 @@ I. For patch submitters
   3) The Documentation/ portion of the patch should come in the series before
      the code implementing the binding.
 
+  4) Any compatible strings used in a chip or board DTS file must be
+     previously documented in the corresponding DT binding text file
+     in Documentation/devicetree/bindings.  This rule applies even if
+     the Linux device driver does not yet match on the compatible
+     string.  checkpatch will emit warnings if this step is not
+     followed as of commit bff5da4335256513497cc8c79f9a9d1665e09864
+     ("checkpatch: add DT compatible string documentation checks").
+
 II. For kernel maintainers
 
   1) If you aren't comfortable reviewing a given binding, reply to it and ask


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