linux-kernel - [PATCH v5 2/5] spi: dt-bindings: cadence: Add Marvell overlay bindings documentation for Cadence XSPI

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Date: Mon, 27 May 2024 01:42:13 -0700
From: Witold Sadowski <wsadowski@...vell.com>
To: <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC: <broonie@...nel.org>, <robh@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <pthombar@...ence.com>, Witold Sadowski <wsadowski@...vell.com>
Subject: [PATCH v5 2/5] spi: dt-bindings: cadence: Add Marvell overlay bindings documentation for Cadence XSPI

Add new bindings for the v2 Marvell xSPI overlay: marvell,cn10-xspi-nor
compatible string. This new compatible string distinguishes between the
original and modified xSPI block.

Also add an optional base for the xfer register set with an additional
reg field to allocate the xSPI Marvell overlay XFER block.

Signed-off-by: Witold Sadowski <wsadowski@...vell.com>
---
 .../devicetree/bindings/spi/cdns,xspi.yaml    | 38 +++++++++++++++----
 1 file changed, 31 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/spi/cdns,xspi.yaml b/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
index eb0f92468185..d6b8b2a2ecf5 100644
--- a/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
+++ b/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
@@ -15,33 +15,57 @@ description: |
   single, dual, quad or octal wire transmission modes for
   read/write access to slaves such as SPI-NOR flash.
 
-allOf:
-  - $ref: spi-controller.yaml#
-
 properties:
   compatible:
-    const: cdns,xspi-nor
+    enum:
+      - cdns,xspi-nor
+      - marvell,cn10-xspi-nor
+
+  interrupts:
+    maxItems: 1
 
   reg:
     items:
       - description: address and length of the controller register set
       - description: address and length of the Slave DMA data port
       - description: address and length of the auxiliary registers
+      - description: address and length of the xfer registers
+    minItems: 3
 
   reg-names:
     items:
       - const: io
       - const: sdma
       - const: aux
-
-  interrupts:
-    maxItems: 1
+      - const: xferbase
+    minItems: 3
 
 required:
   - compatible
   - reg
   - interrupts
 
+allOf:
+  - $ref: spi-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - marvell,cn10-xspi-nor
+    then:
+      properties:
+        reg:
+          minItems: 4
+        reg-names:
+          minItems: 4
+    else:
+      properties:
+        reg:
+          maxItems: 3
+        reg-names:
+          maxItems: 3
+
 unevaluatedProperties: false
 
 examples:
-- 
2.43.0