spi: dt-bindings: arm,pl022: Move child node properties to separate schema

In order to validate SPI peripherals, SPI controller-specific child node
properties need to be in a separate schema, spi-peripheral-props.yaml,
which SPI peripheral schemas reference. Move the arm,pl022 child
properties to their own schema file and add a $ref in
spi-peripheral-props.yaml.

Signed-off-by: Rob Herring <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/spi/arm,pl022-peripheral-props.yaml

···
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/arm,pl022-peripheral-props.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Peripheral-specific properties for Arm PL022 SPI controller
+
+maintainers:
+  - Linus Walleij <[e-mail]>
+
+select: false
+
+properties:
+  pl022,interface:
+    description: SPI interface type
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum:
+      - 0      # SPI
+      - 1      # Texas Instruments Synchronous Serial Frame Format
+      - 2      # Microwire (Half Duplex)
+
+  pl022,com-mode:
+    description: Specifies the transfer mode
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum:
+      - 0      # interrupt mode
+      - 1      # polling mode
+      - 2      # DMA mode
+    default: 1
+
+  pl022,rx-level-trig:
+    description: Rx FIFO watermark level
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 4
+
+  pl022,tx-level-trig:
+    description: Tx FIFO watermark level
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 4
+
+  pl022,ctrl-len:
+    description: Microwire interface - Control length
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0x03
+    maximum: 0x1f
+
+  pl022,wait-state:
+    description: Microwire interface - Wait state
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+
+  pl022,duplex:
+    description: Microwire interface - Full/Half duplex
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+
+additionalProperties: true
+...

Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml

···
 
 # The controller specific properties go here.
 allOf:
+  - $ref: arm,pl022-peripheral-props.yaml#
   - $ref: cdns,qspi-nor-peripheral-props.yaml#
   - $ref: samsung,spi-peripheral-props.yaml#
   - $ref: nvidia,tegra210-quad-peripheral-props.yaml#

Documentation/devicetree/bindings/spi/spi-pl022.yaml

···
   resets:
     maxItems: 1
 
-patternProperties:
-  "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-f]+$":
-    type: object
-    # SPI slave nodes must be children of the SPI master node and can
-    # contain the following properties.
-    properties:
-      pl022,interface:
-        description: SPI interface type
-        $ref: /schemas/types.yaml#/definitions/uint32
-        enum:
-          - 0      # SPI
-          - 1      # Texas Instruments Synchronous Serial Frame Format
-          - 2      # Microwire (Half Duplex)
-
-      pl022,com-mode:
-        description: Specifies the transfer mode
-        $ref: /schemas/types.yaml#/definitions/uint32
-        enum:
-          - 0      # interrupt mode
-          - 1      # polling mode
-          - 2      # DMA mode
-        default: 1
-
-      pl022,rx-level-trig:
-        description: Rx FIFO watermark level
-        $ref: /schemas/types.yaml#/definitions/uint32
-        minimum: 0
-        maximum: 4
-
-      pl022,tx-level-trig:
-        description: Tx FIFO watermark level
-        $ref: /schemas/types.yaml#/definitions/uint32
-        minimum: 0
-        maximum: 4
-
-      pl022,ctrl-len:
-        description: Microwire interface - Control length
-        $ref: /schemas/types.yaml#/definitions/uint32
-        minimum: 0x03
-        maximum: 0x1f
-
-      pl022,wait-state:
-        description: Microwire interface - Wait state
-        $ref: /schemas/types.yaml#/definitions/uint32
-        enum: [0, 1]
-
-      pl022,duplex:
-        description: Microwire interface - Full/Half duplex
-        $ref: /schemas/types.yaml#/definitions/uint32
-        enum: [0, 1]
-
 required:
   - compatible
   - reg