dt-bindings: can: rcar_can: Convert to json-schema

Renesas R-Car CAN controller Device Tree Bindings

-------------------------------------------------

Required properties:

- compatible: "renesas,can-r8a7742" if CAN controller is a part of R8A7742 SoC.

	      "renesas,can-r8a7743" if CAN controller is a part of R8A7743 SoC.

	      "renesas,can-r8a7744" if CAN controller is a part of R8A7744 SoC.

	      "renesas,can-r8a7745" if CAN controller is a part of R8A7745 SoC.

	      "renesas,can-r8a77470" if CAN controller is a part of R8A77470 SoC.

	      "renesas,can-r8a774a1" if CAN controller is a part of R8A774A1 SoC.

	      "renesas,can-r8a774b1" if CAN controller is a part of R8A774B1 SoC.

	      "renesas,can-r8a774c0" if CAN controller is a part of R8A774C0 SoC.

	      "renesas,can-r8a774e1" if CAN controller is a part of R8A774E1 SoC.

	      "renesas,can-r8a7778" if CAN controller is a part of R8A7778 SoC.

	      "renesas,can-r8a7779" if CAN controller is a part of R8A7779 SoC.

	      "renesas,can-r8a7790" if CAN controller is a part of R8A7790 SoC.

	      "renesas,can-r8a7791" if CAN controller is a part of R8A7791 SoC.

	      "renesas,can-r8a7792" if CAN controller is a part of R8A7792 SoC.

	      "renesas,can-r8a7793" if CAN controller is a part of R8A7793 SoC.

	      "renesas,can-r8a7794" if CAN controller is a part of R8A7794 SoC.

	      "renesas,can-r8a7795" if CAN controller is a part of R8A7795 SoC.

	      "renesas,can-r8a7796" if CAN controller is a part of R8A77960 SoC.

	      "renesas,can-r8a77961" if CAN controller is a part of R8A77961 SoC.

	      "renesas,can-r8a77965" if CAN controller is a part of R8A77965 SoC.

	      "renesas,can-r8a77990" if CAN controller is a part of R8A77990 SoC.

	      "renesas,can-r8a77995" if CAN controller is a part of R8A77995 SoC.

	      "renesas,rcar-gen1-can" for a generic R-Car Gen1 compatible device.

	      "renesas,rcar-gen2-can" for a generic R-Car Gen2 or RZ/G1

	      compatible device.

	      "renesas,rcar-gen3-can" for a generic R-Car Gen3 or RZ/G2

	      compatible device.

	      When compatible with the generic version, nodes must list the

	      SoC-specific version corresponding to the platform first

	      followed by the generic version.

- reg: physical base address and size of the R-Car CAN register map.

- interrupts: interrupt specifier for the sole interrupt.

- clocks: phandles and clock specifiers for 3 CAN clock inputs.

- clock-names: 3 clock input name strings: "clkp1", "clkp2", and "can_clk".

- pinctrl-0: pin control group to be used for this controller.

- pinctrl-names: must be "default".

Required properties for R8A774A1, R8A774B1, R8A774C0, R8A774E1, R8A7795,

R8A77960, R8A77961, R8A77965, R8A77990, and R8A77995:

For the denoted SoCs, "clkp2" can be CANFD clock. This is a div6 clock and can

be used by both CAN and CAN FD controller at the same time. It needs to be

scaled to maximum frequency if any of these controllers use it. This is done

using the below properties:

- assigned-clocks: phandle of clkp2(CANFD) clock.

- assigned-clock-rates: maximum frequency of this clock.

Optional properties:

- renesas,can-clock-select: R-Car CAN Clock Source Select. Valid values are:

			    <0x0> (default) : Peripheral clock (clkp1)

			    <0x1> : Peripheral clock (clkp2)

			    <0x3> : External input clock

Example

-------

SoC common .dtsi file:

	can0: can@e6e80000 {

		compatible = "renesas,can-r8a7791", "renesas,rcar-gen2-can";

		reg = <0 0xe6e80000 0 0x1000>;

		interrupts = <0 186 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&mstp9_clks R8A7791_CLK_RCAN0>,

			 <&cpg_clocks R8A7791_CLK_RCAN>, <&can_clk>;

		clock-names = "clkp1", "clkp2", "can_clk";

		status = "disabled";

	};

Board specific .dts file:

&can0 {

	pinctrl-0 = <&can0_pins>;

	pinctrl-names = "default";

	status = "okay";

};

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/net/can/renesas,rcar-can.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas R-Car CAN Controller

maintainers:

  - Sergei Shtylyov <sergei.shtylyov@gmail.com>

properties:

  compatible:

    oneOf:

      - items:

          - enum:

              - renesas,can-r8a7778      # R-Car M1-A

              - renesas,can-r8a7779      # R-Car H1

          - const: renesas,rcar-gen1-can # R-Car Gen1

      - items:

          - enum:

              - renesas,can-r8a7742      # RZ/G1H

              - renesas,can-r8a7743      # RZ/G1M

              - renesas,can-r8a7744      # RZ/G1N

              - renesas,can-r8a7745      # RZ/G1E

              - renesas,can-r8a77470     # RZ/G1C

              - renesas,can-r8a7790      # R-Car H2

              - renesas,can-r8a7791      # R-Car M2-W

              - renesas,can-r8a7792      # R-Car V2H

              - renesas,can-r8a7793      # R-Car M2-N

              - renesas,can-r8a7794      # R-Car E2

          - const: renesas,rcar-gen2-can # R-Car Gen2 and RZ/G1

      - items:

          - enum:

              - renesas,can-r8a774a1     # RZ/G2M

              - renesas,can-r8a774b1     # RZ/G2N

              - renesas,can-r8a774c0     # RZ/G2E

              - renesas,can-r8a774e1     # RZ/G2H

              - renesas,can-r8a7795      # R-Car H3

              - renesas,can-r8a7796      # R-Car M3-W

              - renesas,can-r8a77961     # R-Car M3-W+

              - renesas,can-r8a77965     # R-Car M3-N

              - renesas,can-r8a77990     # R-Car E3

              - renesas,can-r8a77995     # R-Car D3

          - const: renesas,rcar-gen3-can # R-Car Gen3 and RZ/G2

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    maxItems: 3

  clock-names:

    items:

      - const: clkp1

      - const: clkp2

      - const: can_clk

  power-domains:

    maxItems: 1

  resets:

    maxItems: 1

  renesas,can-clock-select:

    $ref: /schemas/types.yaml#/definitions/uint32

    enum: [ 0, 1, 3 ]

    default: 0

    description: |

      R-Car CAN Clock Source Select.  Valid values are:

        <0x0> (default) : Peripheral clock (clkp1)

        <0x1> : Peripheral clock (clkp2)

        <0x3> : External input clock

  assigned-clocks:

    description:

      Reference to the clkp2 (CANFD) clock.

      On R-Car Gen3 and RZ/G2 SoCs, "clkp2" is the CANFD clock.  This is a div6

      clock and can be used by both CAN and CAN FD controllers at the same

      time.  It needs to be scaled to maximum frequency if any of these

      controllers use it.

  assigned-clock-rates:

    description: Maximum frequency of the CANFD clock.

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

  - power-domains

allOf:

  - $ref: can-controller.yaml#

  - if:

      not:

        properties:

          compatible:

            contains:

              const: renesas,rcar-gen1-can

    then:

      required:

        - resets

  - if:

      properties:

        compatible:

          contains:

            const: renesas,rcar-gen3-can

    then:

      required:

        - assigned-clocks

        - assigned-clock-rates

unevaluatedProperties: false

examples:

  - |

    #include <dt-bindings/clock/r8a7791-cpg-mssr.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    #include <dt-bindings/power/r8a7791-sysc.h>

    can0: can@e6e80000 {

            compatible = "renesas,can-r8a7791", "renesas,rcar-gen2-can";

            reg = <0xe6e80000 0x1000>;

            interrupts = <GIC_SPI 186 IRQ_TYPE_LEVEL_HIGH>;

            clocks = <&cpg CPG_MOD 916>,

                     <&cpg CPG_CORE R8A7791_CLK_RCAN>, <&can_clk>;

            clock-names = "clkp1", "clkp2", "can_clk";

            power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;

            resets = <&cpg 916>;

    };