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Commit bbddb0fc authored by Maxime Ripard's avatar Maxime Ripard Committed by Wolfram Sang
Browse files

dt-bindings: i2c: sun6i-p2wi: Add YAML schemas 



Switch the DT binding to a YAML schema to enable the DT validation.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent d04913ec

Documentation/devicetree/bindings/i2c/allwinner,sun6i-a31-p2wi.yaml

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# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/i2c/allwinner,sun6i-a31-p2wi.yaml#

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



title: Allwinner A31 P2WI (Push/Pull 2 Wires Interface) Device Tree Bindings



maintainers:

  - Chen-Yu Tsai <wens@csie.org>

  - Maxime Ripard <maxime.ripard@bootlin.com>



allOf:

  - $ref: /schemas/i2c/i2c-controller.yaml#



properties:

  compatible:

    const: allwinner,sun6i-a31-p2wi



  reg:

    maxItems: 1



  interrupts:

    maxItems: 1



  clocks:

    maxItems: 1



  resets:

    maxItems: 1



  clock-frequency:

    minimum: 1

    maximum: 6000000



required:

  - compatible

  - reg

  - interrupts

  - clocks

  - resets



# FIXME: We should set it, but it would report all the generic

# properties as additional properties.

# additionalProperties: false



examples:

  - |

    i2c@1f03400 {

        compatible = "allwinner,sun6i-a31-p2wi";

        reg = <0x01f03400 0x400>;

        interrupts = <0 39 4>;

        clocks = <&apb0_gates 3>;

        clock-frequency = <6000000>;

        resets = <&apb0_rst 3>;

        #address-cells = <1>;

        #size-cells = <0>;



        axp221: pmic@68 {

            compatible = "x-powers,axp221";

            reg = <0x68>;

        };

    };



...

Documentation/devicetree/bindings/i2c/i2c-sun6i-p2wi.txt

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* Allwinner P2WI (Push/Pull 2 Wire Interface) controller



Required properties :



 - reg             : Offset and length of the register set for the device.

 - compatible      : Should one of the following:

                     - "allwinner,sun6i-a31-p2wi"

 - interrupts      : The interrupt line connected to the P2WI peripheral.

 - clocks          : The gate clk connected to the P2WI peripheral.

 - resets          : The reset line connected to the P2WI peripheral.



Optional properties :



 - clock-frequency : Desired P2WI bus clock frequency in Hz. If not set the

default frequency is 100kHz



A P2WI may contain one child node encoding a P2WI slave device.



Slave device properties:

  Required properties:

   - reg           : the I2C slave address used during the initialization

                     process to switch from I2C to P2WI mode



Example:



	p2wi@1f03400 {

		compatible = "allwinner,sun6i-a31-p2wi";

		reg = <0x01f03400 0x400>;

		interrupts = <0 39 4>;

		clocks = <&apb0_gates 3>;

		clock-frequency = <6000000>;

		resets = <&apb0_rst 3>;



		axp221: pmic@68 {

			compatible = "x-powers,axp221";

			reg = <0x68>;



			/* ... */

		};

	};