[PATCH 1/3] dt-bindings: spi: airoha: Add YAML schema for SNFI controller

[Lorenzo Bianconi]

Introduce Airoha EN7581 SPI NAND controller binding

Tested-by: Rajeev Kumar <Rajeev.Kumar at airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
---
 .../bindings/spi/airoha,spi-airoha-snfi.yaml  | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/airoha,spi-airoha-snfi.yaml

diff --git a/Documentation/devicetree/bindings/spi/airoha,spi-airoha-snfi.yaml b/Documentation/devicetree/bindings/spi/airoha,spi-airoha-snfi.yaml
new file mode 100644
index 000000000000..0244f242eff1
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/airoha,spi-airoha-snfi.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/airoha,spi-airoha-snfi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SPI-NAND flash controller for Airoha ARM SoCs
+
+maintainers:
+  - Lorenzo Bianconi <lorenzo at kernel.org>
+
+allOf:
+  - $ref: spi-controller.yaml#
+
+properties:
+  compatible:
+    const: airoha,en7581-snand
+
+  reg:
+    maxItems: 2
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      spi at 1fa10000 {
+        compatible = "airoha,en7581-snand";
+        reg = <0x0 0x1fa10000 0x0 0x140>,
+              <0x0 0x1fa11000 0x0 0x160>;
+        interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        flash at 0 {
+          compatible = "spi-nand";
+          reg = <0>;
+          spi-tx-bus-width = <1>;
+          spi-rx-bus-width = <2>;
+        };
+      };
+    };
-- 
2.44.0