spi: omap-spi: Convert to json-schema

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";

};

# 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";

    };