linux-kernel - [PATCH] dt-bindings: soc: xilinx: Add support for KV260 CC

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Date: Tue, 23 Jan 2024 15:23:08 +0100
From: Michal Simek <michal.simek@....com>
To: <linux-kernel@...r.kernel.org>, <monstr@...str.eu>,
	<michal.simek@...inx.com>, <git@...inx.com>
CC: Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Rob Herring <robh+dt@...nel.org>, "open
 list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@...r.kernel.org>, "moderated list:ARM/ZYNQ ARCHITECTURE"
	<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH] dt-bindings: soc: xilinx: Add support for KV260 CC

When DT overlay is applied at run time compatible string or model AFAIK is
not updated. But when fdtoverlay tool is used it actually creates full
description for used SOM and carrier card(CC). That's why there is no
reason to use generic SOM name and its compatible strings because they are
not properly reflected in newly created DT.
Composing dt overlays together was introduced by commit 7a4c31ee877a
("arm64: zynqmp: Add support for Xilinx Kria SOM board") and later renamed
by commit 45fe0dc4ea2e ("arm64: xilinx: Use zynqmp prefix for SOM dt
overlays").
DTB selection is done prior booting OS that's why there is no need to do
run time composition for SOM and CC combination. And user space can use
compatible string and all listed revisions to figured it out which SOM and
CC combinations OS is running at.

Signed-off-by: Michal Simek <michal.simek@....com>
---

We are using U-Boot DTB reselection feature to identify SOM + CC
combination.

This patch depends on
https://lore.kernel.org/r/90e1a393154c3d87e8ee7dc9eef07fc937c1eaf7.1706019397.git.michal.simek@amd.com

---
 .../bindings/soc/xilinx/xilinx.yaml           | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/xilinx/xilinx.yaml b/Documentation/devicetree/bindings/soc/xilinx/xilinx.yaml
index 7c75dbb4f307..131aba5ed9f4 100644
--- a/Documentation/devicetree/bindings/soc/xilinx/xilinx.yaml
+++ b/Documentation/devicetree/bindings/soc/xilinx/xilinx.yaml
@@ -148,6 +148,40 @@ properties:
           - contains:
               const: xlnx,zynqmp-smk-k26
 
+      - description: Xilinx Kria SOM KV260 revA/Y/Z
+        minItems: 3
+        items:
+          enum:
+            - xlnx,zynqmp-sk-kv260-revA
+            - xlnx,zynqmp-sk-kv260-revY
+            - xlnx,zynqmp-sk-kv260-revZ
+            - xlnx,zynqmp-sk-kv260
+            - xlnx,zynqmp
+        allOf:
+          - contains:
+              const: xlnx,zynqmp-sk-kv260-revA
+          - contains:
+              const: xlnx,zynqmp-sk-kv260
+          - contains:
+              const: xlnx,zynqmp
+
+      - description: Xilinx Kria SOM KV260 rev2/1/B
+        minItems: 3
+        items:
+          enum:
+            - xlnx,zynqmp-sk-kv260-rev2
+            - xlnx,zynqmp-sk-kv260-rev1
+            - xlnx,zynqmp-sk-kv260-revB
+            - xlnx,zynqmp-sk-kv260
+            - xlnx,zynqmp
+        allOf:
+          - contains:
+              const: xlnx,zynqmp-sk-kv260-revB
+          - contains:
+              const: xlnx,zynqmp-sk-kv260
+          - contains:
+              const: xlnx,zynqmp
+
       - description: AMD MicroBlaze V (QEMU)
         items:
           - const: qemu,mbv
-- 
2.36.1