[PATCH 1/2] dt-bindings: spi: nuvoton,ma35d1-spi: Add Nuvoton MA35D1 SPI controller

[Chi-Wen Weng <cwweng.linux@gmail.com>]

From: Chi-Wen Weng <cwweng@nuvoton.com>

Add a Devicetree binding for the SPI controller found in the
Nuvoton MA35D1 SoC.

The controller provides two native chip-select outputs and supports
additional GPIO chip selects through the generic SPI controller
binding.

Describe the controller register region, clock, reset, and optional
interrupt resources.

Signed-off-by: Chi-Wen Weng <cwweng@nuvoton.com>
---
 .../bindings/spi/nuvoton,ma35d1-spi.yaml      | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/nuvoton,ma35d1-spi.yaml

diff --git a/Documentation/devicetree/bindings/spi/nuvoton,ma35d1-spi.yaml b/Documentation/devicetree/bindings/spi/nuvoton,ma35d1-spi.yaml
new file mode 100644
index 000000000000..4e1afbdb195d
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/nuvoton,ma35d1-spi.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/nuvoton,ma35d1-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 SPI Controller
+
+description: |
+  The Nuvoton MA35D1 SPI controller supports host and target operation and
+  provides two native chip-select outputs. GPIO chip selects are supported
+  through the generic SPI controller binding.
+
+maintainers:
+  - Chi-Wen Weng <cwweng@nuvoton.com>
+
+allOf:
+  - $ref: /schemas/spi/spi-controller.yaml#
+
+properties:
+  compatible:
+    const: nuvoton,ma35d1-spi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  num-cs:
+    minimum: 1
+    maximum: 2
+    default: 2
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        spi@40600000 {
+            compatible = "nuvoton,ma35d1-spi";
+            reg = <0x0 0x40600000 0x0 0x10000>;
+            interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&clk SPI0_GATE>;
+            resets = <&sys MA35D1_RESET_SPI0>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+        };
+    };
+...
-- 
2.25.1