linux-kernel - [PATCH v2 2/4] dt-bindings: memory-controllers: tegra210: Allow fallback compatible

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Message-Id: <20250508-tegra210-emc-dt-v2-2-d33dc20a1123@gmail.com>
Date: Thu, 08 May 2025 01:07:39 -0500
From: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@...nel.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org, 
 devicetree@...r.kernel.org, Aaron Kling <webgeek1234@...il.com>
Subject: [PATCH v2 2/4] dt-bindings: memory-controllers: tegra210: Allow
 fallback compatible

From: Aaron Kling <webgeek1234@...il.com>

The nvidia,tegra21-emc compatible is required by the Nvidia Android
bootloader to copy emc training value into the kernel dt. So allow this
as a fallback compatible to avoid needing to change the driver.

Signed-off-by: Aaron Kling <webgeek1234@...il.com>
---
 .../devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml
index 78e3417d273a329b77bf2f61de41b29017be56d3..acae6c8a6c0ab9ceaddf00342c933499350568eb 100644
--- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml
@@ -16,7 +16,11 @@ description: |
 
 properties:
   compatible:
-    const: nvidia,tegra210-emc
+    oneOf:
+      - const: nvidia,tegra210-emc
+      - items:
+          - const: nvidia,tegra210-emc
+          - const: nvidia,tegra21-emc
 
   reg:
     maxItems: 3

-- 
2.48.1