dt-bindings: spi: convert rockchip spi bindings to yaml

* Rockchip SPI Controller

The Rockchip SPI controller is used to interface with various devices such as flash

and display controllers using the SPI communication interface.

Required Properties:

- compatible: should be one of the following.

    "rockchip,rv1108-spi" for rv1108 SoCs.

    "rockchip,px30-spi", "rockchip,rk3066-spi" for px30 SoCs.

    "rockchip,rk3036-spi" for rk3036 SoCS.

    "rockchip,rk3066-spi" for rk3066 SoCs.

    "rockchip,rk3188-spi" for rk3188 SoCs.

    "rockchip,rk3228-spi" for rk3228 SoCS.

    "rockchip,rk3288-spi" for rk3288 SoCs.

    "rockchip,rk3368-spi" for rk3368 SoCs.

    "rockchip,rk3399-spi" for rk3399 SoCs.

- reg: physical base address of the controller and length of memory mapped

       region.

- interrupts: The interrupt number to the cpu. The interrupt specifier format

              depends on the interrupt controller.

- clocks: Must contain an entry for each entry in clock-names.

- clock-names: Shall be "spiclk" for the transfer-clock, and "apb_pclk" for

			   the peripheral clock.

- #address-cells: should be 1.

- #size-cells: should be 0.

Optional Properties:

- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,

		Documentation/devicetree/bindings/dma/dma.txt

- dma-names: DMA request names should include "tx" and "rx" if present.

- rx-sample-delay-ns: nanoseconds to delay after the SCLK edge before sampling

		Rx data (may need to be fine tuned for high capacitance lines).

		No delay (0) by default.

- pinctrl-names: Names for the pin configuration(s); may be "default" or

		"sleep", where the "sleep" configuration may describe the state

		the pins should be in during system suspend. See also

		pinctrl/pinctrl-bindings.txt.

Example:

	spi0: spi@ff110000 {

		compatible = "rockchip,rk3066-spi";

		reg = <0xff110000 0x1000>;

		dmas = <&pdma1 11>, <&pdma1 12>;

		dma-names = "tx", "rx";

		rx-sample-delay-ns = <10>;

		#address-cells = <1>;

		#size-cells = <0>;

		interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;

		clock-names = "spiclk", "apb_pclk";

		pinctrl-0 = <&spi1_pins>;

		pinctrl-1 = <&spi1_sleep>;

		pinctrl-names = "default", "sleep";

	};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/spi/spi-rockchip.yaml#

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

title: Rockchip SPI Controller

description:

  The Rockchip SPI controller is used to interface with various devices such

  as flash and display controllers using the SPI communication interface.

allOf:

  - $ref: "spi-controller.yaml#"

maintainers:

  - Heiko Stuebner <heiko@sntech.de>

# Everything else is described in the common file

properties:

  compatible:

    oneOf:

      - const: rockchip,rk3036-spi

      - const: rockchip,rk3066-spi

      - const: rockchip,rk3228-spi

      - const: rockchip,rv1108-spi

      - items:

          - enum:

            - rockchip,px30-spi

            - rockchip,rk3188-spi

            - rockchip,rk3288-spi

            - rockchip,rk3368-spi

            - rockchip,rk3399-spi

          - const: rockchip,rk3066-spi

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    items:

      - description: transfer-clock

      - description: peripheral clock

  clock-names:

    items:

      - const: spiclk

      - const: apb_pclk

  dmas:

    items:

      - description: TX DMA Channel

      - description: RX DMA Channel

  dma-names:

    items:

      - const: tx

      - const: rx

  rx-sample-delay-ns:

    default: 0

    description:

      Nano seconds to delay after the SCLK edge before sampling Rx data

      (may need to be fine tuned for high capacitance lines).

      If not specified 0 will be used.

  pinctrl-names:

    minItems: 1

    items:

      - const: default

      - const: sleep

    description:

      Names for the pin configuration(s); may be "default" or "sleep",

      where the "sleep" configuration may describe the state

      the pins should be in during system suspend.

required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names

examples:

  - |

    #include <dt-bindings/clock/rk3188-cru-common.h>

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

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

    spi0: spi@ff110000 {

      compatible = "rockchip,rk3066-spi";

      reg = <0xff110000 0x1000>;

      interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;

      clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;

      clock-names = "spiclk", "apb_pclk";

      dmas = <&pdma1 11>, <&pdma1 12>;

      dma-names = "tx", "rx";

      pinctrl-0 = <&spi1_pins>;

      pinctrl-1 = <&spi1_sleep>;

      pinctrl-names = "default", "sleep";

      rx-sample-delay-ns = <10>;

      #address-cells = <1>;

      #size-cells = <0>;

    };

S:	Maintained

F:	Documentation/devicetree/bindings/i2c/i2c-rk3x.txt

F:	Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml

F:	Documentation/devicetree/bindings/spi/spi-rockchip.yaml

F:	arch/arm/boot/dts/rk3*

F:	arch/arm/boot/dts/rv1108*

F:	arch/arm/mach-rockchip/