linux-kernel - [PATCH v3 1/2] spi: cadence: add dt-bindings documentation for Cadence XSPI controller

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Date:   Wed, 1 Sep 2021 14:37:09 +0200
From:   Parshuram Thombare <pthombar@...ence.com>
To:     <broonie@...nel.org>, <lukas@...ner.de>, <p.yadav@...com>,
        <robh+dt@...nel.org>
CC:     <linux-spi@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <jpawar@...ence.com>,
        <mparab@...ence.com>, Parshuram Thombare <pthombar@...ence.com>,
        Konrad Kociolek <konrad@...ence.com>
Subject: [PATCH v3 1/2] spi: cadence: add dt-bindings documentation for Cadence XSPI controller

Add DT binding for Cadence's XSPI controller driver.

Signed-off-by: Konrad Kociolek <konrad@...ence.com>
Signed-off-by: Jayshri Pawar <jpawar@...ence.com>
Signed-off-by: Parshuram Thombare <pthombar@...ence.com>
---
 .../devicetree/bindings/spi/cdns,xspi.yaml         | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/cdns,xspi.yaml

diff --git a/Documentation/devicetree/bindings/spi/cdns,xspi.yaml b/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
new file mode 100644
index 0000000..e52d6fa
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/cdns,xspi.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2020-21 Cadence
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/spi/cdns,xspi.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Cadence XSPI Controller
+
+maintainers:
+  - Parshuram Thombare <pthombar@...ence.com>
+
+description: |
+  The XSPI controller allows SPI protocol communication in
+  single, dual, quad or octal wire transmission modes for
+  read/write access to slaves such as SPI-NOR flash.
+
+properties:
+  compatible:
+    const: cdns,xspi-nor
+
+  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
+
+  reg-names:
+    items:
+      - const: xspi-iobase
+      - const: xspi-sdmabase
+      - const: xspi-auxbase
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    xspi: spi@...10000 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "cdns,xspi-nor";
+        reg = <0x0 0xa0010000 0x0 0x10000>,
+              <0x0 0xb0000000 0x0 0x10000>,
+              <0x0 0xa0020000 0x0 0x10000>;
+        reg-names = "xspi-iobase", "xspi-sdmabase", "xspi-auxbase";
+        interrupts = <0 90 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-parent = <&gic>;
+        mt35xu512@0 {
+            compatible = "spi-nor", "micron,mt35xu512";
+            spi-max-frequency = <75000000>;
+            reg = <0>;
+        };
+        mt35xu512@1 {
+            compatible = "spi-nor", "micron,mt35xu512";
+            spi-max-frequency = <75000000>;
+            reg = <1>;
+        };
+    };
-- 
2.7.4