spi: dt-bindings: nxp,imx94-xspi: Document imx94 xspi

Document imx94 xspi that supports interface to serial flash
supporting following features:

- Single-bit SPI, Dual SPI, Quad SPI and Octal SPI.
- Single Data Rate or Double Data Rate modes.
- Direct memory mapping of all AHB memory accesses to the
  chip system memory space.
- Multi-master AHB accesses with priority.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://patch.msgid.link/20251216-xspi-v7-1-282525220979@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/nxp,imx94-xspi.yaml

@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/nxp,imx94-xspi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP External Serial Peripheral Interface (xSPI)
+
+maintainers:
+  - Haibo Chen <haibo.chen@nxp.com>
+  - Han Xu <han.xu@nxp.com>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - nxp,imx94-xspi
+
+  reg:
+    items:
+      - description: registers address space
+      - description: memory mapped address space
+
+  reg-names:
+    items:
+      - const: base
+      - const: mmap
+
+  interrupts:
+    items:
+      - description: interrupt for EENV0
+      - description: interrupt for EENV1
+      - description: interrupt for EENV2
+      - description: interrupt for EENV3
+      - description: interrupt for EENV4
+
+  clocks:
+    items:
+      - description: SPI serial clock
+
+  clock-names:
+    items:
+      - const: per
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - clocks
+  - clock-names
+
+allOf:
+  - $ref: spi-controller.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        spi@42b90000 {
+            compatible = "nxp,imx94-xspi";
+            reg = <0x0 0x42b90000 0x0 0x50000>, <0x0 0x28000000 0x0 0x08000000>;
+            reg-names = "base", "mmap";
+            interrupts = <GIC_SPI 390 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 391 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 392 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 393 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 394 IRQ_TYPE_LEVEL_HIGH>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            clocks = <&scmi_1>;
+            clock-names = "per";
+
+            flash@0 {
+                compatible = "jedec,spi-nor";
+                reg = <0>;
+                spi-max-frequency = <200000000>;
+                spi-rx-bus-width = <8>;
+                spi-tx-bus-width = <8>;
+            };
+        };
+    };

MAINTAINERS

@@ -18946,6 +18946,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/sound/trivial-codec.yaml
 F:	sound/soc/codecs/tfa9879*
 
+NXP XSPI DRIVER
+M:	Han Xu <han.xu@nxp.com>
+M:	Haibo Chen <haibo.chen@nxp.com>
+L:	linux-spi@vger.kernel.org
+L:	imx@lists.linux.dev
+S:	Maintained
+F:	Documentation/devicetree/bindings/spi/nxp,imx94-xspi.yaml
+
 NXP-NCI NFC DRIVER
 S:	Orphan
 F:	Documentation/devicetree/bindings/net/nfc/nxp,nci.yaml