[PATCH v3 1/2] dt-bindings: spi: nuvoton,ma35d1-qspi: Add Nuvoton MA35D1 QSPI

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

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

Add a devicetree binding for the Quad SPI controller found in
Nuvoton MA35D1 SoCs.

The controller supports SPI memory devices such as SPI NOR and SPI NAND
flashes. It has one register range, one clock input and one reset line,
and supports up to two chip selects.

Signed-off-by: Chi-Wen Weng <cwweng@nuvoton.com>
---
 .../bindings/spi/nuvoton,ma35d1-qspi.yaml     | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/nuvoton,ma35d1-qspi.yaml

diff --git a/Documentation/devicetree/bindings/spi/nuvoton,ma35d1-qspi.yaml b/Documentation/devicetree/bindings/spi/nuvoton,ma35d1-qspi.yaml
new file mode 100644
index 000000000000..d3b36e612eb0
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/nuvoton,ma35d1-qspi.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/nuvoton,ma35d1-qspi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 Quad SPI Controller
+
+maintainers:
+  - Chi-Wen Weng <cwweng@nuvoton.com>
+
+allOf:
+  - $ref: /schemas/spi/spi-controller.yaml#
+
+properties:
+  compatible:
+    const: nuvoton,ma35d1-qspi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  num-cs:
+    maximum: 2
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+    #include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        spi@40680000 {
+            compatible = "nuvoton,ma35d1-qspi";
+            reg = <0 0x40680000 0 0x100>;
+            interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&clk QSPI0_GATE>;
+            resets = <&sys MA35D1_RESET_QSPI0>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+        };
+    };
+
-- 
2.25.1