linux-kernel - [PATCH v5 1/4] dt-bindings: mtd: raw-nand-chip: Relax node name pattern

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Message-Id: <20250412-ppcyaml-elbc-v5-1-03f0e577139f@posteo.net>
Date: Sat, 12 Apr 2025 15:16:02 +0200
From: J. Neuschäfer via B4 Relay <devnull+j.ne.posteo.net@...nel.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Crystal Wood <oss@...error.net>, 
 Madhavan Srinivasan <maddy@...ux.ibm.com>, 
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, 
 Christophe Leroy <christophe.leroy@...roup.eu>, 
 Naveen N Rao <naveen@...nel.org>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>
Cc: Frank Li <Frank.Li@....com>, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-mtd@...ts.infradead.org, 
 linuxppc-dev@...ts.ozlabs.org, dri-devel@...ts.freedesktop.org, 
 J. Neuschäfer <j.ne@...teo.net>
Subject: [PATCH v5 1/4] dt-bindings: mtd: raw-nand-chip: Relax node name
 pattern

From: "J. Neuschäfer" <j.ne@...teo.net>

In some scenarios, such as under the Freescale eLBC bus, there are raw
NAND chips with a unit address that has a comma in it (cs,offset).
For reasons of compatibility with historical device trees and
readability of the unit addresses, this format is kept.

Relax the $nodename pattern in raw-nand-chip.yaml to allow such unit
addresses. Unfortunately $nonenames defined in bindings that reference
raw-nand

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
Signed-off-by: J. Neuschäfer <j.ne@...teo.net>
---

V5:
- Add Rob's review tag

V4:
- reintroduce patch to silence dtc validation error, after discussion
  with Rob Herring and Miquèl Raynal
- add some more detail to the commit message
- remove unit address format rather than extending it
  (old pattern: "^nand@[a-f0-9](,[0-9a-f]*)?$")

V3:
- remove patch after discussion with Miquèl Raynal

V2:
- new patch
---
 Documentation/devicetree/bindings/mtd/raw-nand-chip.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mtd/raw-nand-chip.yaml b/Documentation/devicetree/bindings/mtd/raw-nand-chip.yaml
index 092448d7bfc5ccd246ca4b2341464e18722a2d51..d655f6673fc31b1d9ee7cd734cbe1d310f88090b 100644
--- a/Documentation/devicetree/bindings/mtd/raw-nand-chip.yaml
+++ b/Documentation/devicetree/bindings/mtd/raw-nand-chip.yaml
@@ -25,7 +25,7 @@ description: |

 properties:
   $nodename:
-    pattern: "^nand@[a-f0-9]$"
+    pattern: "^nand@"

   reg:
     description:

-- 
2.48.0.rc1.219.gb6b6757d772