[PATCH 1/2] dt-bindings: spi: Document imx94 xspi

[Haibo Chen <haibo.chen@nxp.com>]

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.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 .../devicetree/bindings/spi/spi-nxp-xspi.yaml      | 84 ++++++++++++++++++++++
 MAINTAINERS                                        |  8 +++
 2 files changed, 92 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-nxp-xspi.yaml b/Documentation/devicetree/bindings/spi/spi-nxp-xspi.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..36970514036fe8e776908a15ed1ea2b21f2c4c9a
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-nxp-xspi.yaml
@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/spi-nxp-xspi.yaml#
+$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:
+    maxItems: 5
+
+  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,imx943-xspi";
+            reg = <0x42b90000 0x50000>, <0x28000000 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>;
+            };
+
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 9c92d43af5e22ae57877e239b47fd70decdb3fb9..2a47206cdb290b27ac6829d3a92289ca65d28d46 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18622,6 +18622,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/spi/spi-nxp-fspi.yaml
 F:	drivers/spi/spi-nxp-fspi.c
 
+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/spi-nxp-xspi.yaml
+
 NXP FXAS21002C DRIVER
 M:	Rui Miguel Silva <rmfrfs@gmail.com>
 L:	linux-iio@vger.kernel.org

-- 
2.34.1