linux-kernel - [PATCH v3 2/5] spi: cadence: Add MRVL overlay bindings documentation for Cadence XSPI

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Message-ID: <20240418011353.1764672-3-wsadowski@marvell.com>
Date: Wed, 17 Apr 2024 18:13:49 -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 v3 2/5] spi: cadence: Add MRVL overlay bindings documentation for Cadence XSPI

Add new bindings for v2 Marvell xSPI overlay:
mrvl,xspi-nor  compatible string
New compatible string to distinguish between orginal and modified xSPI
block

PHY configuration registers
Allow to change orginal xSPI PHY configuration values. If not set, and
Marvell overlay is enabled, safe defaults will be written into xSPI PHY

Optional base for xfer register set
Additional reg field to allocate xSPI Marvell overlay XFER block

Signed-off-by: Witold Sadowski <wsadowski@...vell.com>
---
 .../devicetree/bindings/spi/cdns,xspi.yaml    | 92 ++++++++++++++++++-
 1 file changed, 91 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/spi/cdns,xspi.yaml b/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
index eb0f92468185..0e608245b136 100644
--- a/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
+++ b/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
@@ -20,23 +20,82 @@ allOf:
 
 properties:
   compatible:
-    const: cdns,xspi-nor
+    oneOf:
+      - description: Vanilla Cadence xSPI controller
+        items:
+          - const: cdns,xspi-nor
+      - description: Cadence xSPI controller with v2 Marvell overlay
+        items:
+          - const: mrvl,xspi-nor
+
 
   reg:
+    minItems: 3
     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
 
   reg-names:
+    minItems: 3
     items:
       - const: io
       - const: sdma
       - const: aux
+      - const: xferbase
 
   interrupts:
     maxItems: 1
 
+  cdns,dll-phy-control:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x707
+
+  cdns,rfile-phy-control:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x40000
+
+  cdns,rfile-phy-tsel:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
+
+  cdns,phy-dq-timing:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x101
+
+  cdns,phy-dqs-timing:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x700404
+
+  cdns,phy-gate-lpbk-ctrl:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x200030
+
+  cdns,phy-dll-master-ctrl:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x00800000
+
+  cdns,phy-dll-slave-ctrl:
+    description: |
+      PHY config register. Valid only for cdns,mrvl-xspi-nor
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x0000ff01
+
 required:
   - compatible
   - reg
@@ -68,6 +127,37 @@ examples:
                 reg = <0>;
             };
 
+            flash@1 {
+                compatible = "jedec,spi-nor";
+                spi-max-frequency = <75000000>;
+                reg = <1>;
+            };
+        };
+    };
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        mrvl_xspi: spi@...10000 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            compatible = "mrvl,xspi-nor";
+            reg = <0x0 0xa0010000 0x0 0x1040>,
+                  <0x0 0xb0000000 0x0 0x1000>,
+                  <0x0 0xa0020000 0x0 0x100>,
+                  <0x0 0xa0090000 0x0 0x100>;
+            reg-names = "io", "sdma", "aux", "xferbase";
+            interrupts = <0 90 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-parent = <&gic>;
+
+            flash@0 {
+                compatible = "jedec,spi-nor";
+                spi-max-frequency = <75000000>;
+                reg = <0>;
+            };
+
             flash@1 {
                 compatible = "jedec,spi-nor";
                 spi-max-frequency = <75000000>;
-- 
2.43.0