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From: Josua Mayer <josua@solid-run.com>
Date: Tue, 26 Dec 2023 19:11:34 +0100
Subject: [PATCH v3 3/8] dt-bindings: marvell: a38x: add solidrun armada 388
 clearfog boards
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References: <20231226-support-clearfog-gtr-l8-sfp-v3-0-fd1ac2d6bf2e@solid-run.com>
In-Reply-To: <20231226-support-clearfog-gtr-l8-sfp-v3-0-fd1ac2d6bf2e@solid-run.com>
To: Andrew Lunn <andrew@lunn.ch>, 
 Gregory Clement <gregory.clement@bootlin.com>, 
 Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, 
 Rob Herring <robh+dt@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, 
 linux-kernel@vger.kernel.org, Josua Mayer <josua@solid-run.com>
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Add DT compatible for SolidRun Armada-388 based Clearfog Base and Pro
boards, which are already in place in-tree.

There are already 3 distinct dts in tree for these *two* boards,
declaring particular compatible strings:
- armada-388-clearfog.dts:
  compatible = "solidrun,clearfog-a1", "marvell,armada388",
               "marvell,armada385, "marvell,armada380";
- armada-388-clearfog-base.dts:
  compatible = "solidrun,clearfog-base-a1", "solidrun,clearfog-a1",
               "marvell,armada388", "marvell,armada385,
               "marvell,armada380";
- armada-388-clearfog-pro.dts:
  compatible = "solidrun,clearfog-base-a1", "solidrun,clearfog-a1",
               "marvell,armada388", "marvell,armada385,
               "marvell,armada380";

This has historic reasons, the first entry is a legacy name for the
"pro" version, old versions of u-boot built when only one variant
existed explicitly boot by this name.

Note that both compatibles and model field include the string "A1".
At least up to revision 2.0 of the board, this had been printed
on the pcb. However in marketing material and conversations it is
usually omitted. "Clearfog Pro" and "Clearfog Pro A1" always mean
exactly the same product.

Technically Base and Pro variants are similar enough that they can
successfully boot with each other's dts. Hence it makes (some)
sense for them to share the "clearfog-a1" compatible.

Add bindings for the explicit variants including base / pro suffix.
The legacy "armada-388-clearfog.dts" is not supported by these
bindings" as it does not make sense having two bindings for one board.

Signed-off-by: Josua Mayer <josua@solid-run.com>
---
 .../devicetree/bindings/arm/marvell/armada-38x.yaml          | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/marvell/armada-38x.yaml b/Documentation/devicetree/bindings/arm/marvell/armada-38x.yaml
index 5bc69c4fe34d..f77976138bb3 100644
--- a/Documentation/devicetree/bindings/arm/marvell/armada-38x.yaml
+++ b/Documentation/devicetree/bindings/arm/marvell/armada-38x.yaml
@@ -38,4 +38,16 @@ properties:
           - const: marvell,armada385
           - const: marvell,armada380
 
+      - description:
+          SolidRun Armada 388 based single-board computers
+
+        items:
+          - enum:
+             - solidrun,clearfog-base-a1
+             - solidrun,clearfog-pro-a1
+          - const: solidrun,clearfog-a1
+          - const: marvell,armada388
+          - const: marvell,armada385
+          - const: marvell,armada380
+
 additionalProperties: true

-- 
2.35.3