spi: omap-spi: Convert to json-schema

Convert omap-spi dt-binding documentation from txt to yaml format.
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210621092900.951-1-a-govindraju@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/omap-spi.txt

-OMAP2+ McSPI device
-
-Required properties:
-- compatible :
-  - "ti,am654-mcspi" for AM654.
-  - "ti,omap2-mcspi" for OMAP2 & OMAP3.
-  - "ti,omap4-mcspi" for OMAP4+.
-- ti,spi-num-cs : Number of chipselect supported  by the instance.
-- ti,hwmods: Name of the hwmod associated to the McSPI
-- ti,pindir-d0-out-d1-in: Select the D0 pin as output and D1 as
-			  input. The default is D0 as input and
-			  D1 as output.
-
-Optional properties:
-- dmas: List of DMA specifiers with the controller specific format
-	as described in the generic DMA client binding. A tx and rx
-	specifier is required for each chip select.
-- dma-names: List of DMA request names. These strings correspond
-	1:1 with the DMA specifiers listed in dmas. The string naming
-	is to be "rxN" and "txN" for RX and TX requests,
-	respectively, where N equals the chip select number.
-
-Examples:
-
-[hwmod populated DMA resources]
-
-mcspi1: mcspi@1 {
-    #address-cells = <1>;
-    #size-cells = <0>;
-    compatible = "ti,omap4-mcspi";
-    ti,hwmods = "mcspi1";
-    ti,spi-num-cs = <4>;
-};
-
-[generic DMA request binding]
-
-mcspi1: mcspi@1 {
-    #address-cells = <1>;
-    #size-cells = <0>;
-    compatible = "ti,omap4-mcspi";
-    ti,hwmods = "mcspi1";
-    ti,spi-num-cs = <2>;
-    dmas = <&edma 42
-	    &edma 43
-	    &edma 44
-	    &edma 45>;
-    dma-names = "tx0", "rx0", "tx1", "rx1";
-};

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

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/omap-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SPI controller bindings for OMAP and K3 SoCs
+
+maintainers:
+  - Aswath Govindraju <a-govindraju@ti.com>
+
+allOf:
+  - $ref: spi-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - ti,am654-mcspi
+              - ti,am4372-mcspi
+          - const: ti,omap4-mcspi
+      - items:
+          - enum:
+              - ti,omap2-mcspi
+              - ti,omap4-mcspi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  ti,spi-num-cs:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Number of chipselect supported  by the instance.
+    minimum: 1
+    maximum: 4
+
+  ti,hwmods:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      Must be "mcspi<n>", n being the instance number (1-based).
+      This property is applicable only on legacy platforms mainly omap2/3
+      and ti81xx and should not be used on other platforms.
+    deprecated: true
+
+  ti,pindir-d0-out-d1-in:
+    description:
+      Select the D0 pin as output and D1 as input. The default is D0
+      as input and D1 as output.
+    type: boolean
+
+  dmas:
+    description:
+      List of DMA specifiers with the controller specific format as
+      described in the generic DMA client binding. A tx and rx
+      specifier is required for each chip select.
+    minItems: 1
+    maxItems: 8
+
+  dma-names:
+    description:
+      List of DMA request names. These strings correspond 1:1 with
+      the DMA sepecifiers listed in dmas. The string names is to be
+      "rxN" and "txN" for RX and TX requests, respectively. Where N
+      is the chip select number.
+    minItems: 1
+    maxItems: 8
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+if:
+  properties:
+    compatible:
+      oneOf:
+        - const: ti,omap2-mcspi
+        - const: ti,omap4-mcspi
+
+then:
+  properties:
+    ti,hwmods:
+      items:
+        - pattern: "^mcspi([1-9])$"
+
+else:
+  properties:
+    ti,hwmods: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/soc/ti,sci_pm_domain.h>
+
+    spi@2100000 {
+      compatible = "ti,am654-mcspi","ti,omap4-mcspi";
+      reg = <0x2100000 0x400>;
+      interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&k3_clks 137 1>;
+      power-domains = <&k3_pds 137 TI_SCI_PD_EXCLUSIVE>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      dmas = <&main_udmap 0xc500>, <&main_udmap 0x4500>;
+      dma-names = "tx0", "rx0";
+    };