dt-bindings: pinctrl: Convert i.MX8MN to json-schema

* Freescale IMX8MN IOMUX Controller

Please refer to fsl,imx-pinctrl.txt and pinctrl-bindings.txt in this directory

for common binding part and usage.

Required properties:

- compatible: "fsl,imx8mn-iomuxc"

- reg: should contain the base physical address and size of the iomuxc

  registers.

Required properties in sub-nodes:

- fsl,pins: each entry consists of 6 integers and represents the mux and config

  setting for one pin.  The first 5 integers <mux_reg conf_reg input_reg mux_val

  input_val> are specified using a PIN_FUNC_ID macro, which can be found in

  <arch/arm64/boot/dts/freescale/imx8mn-pinfunc.h>. The last integer CONFIG is

  the pad setting value like pull-up on this pin. Please refer to i.MX8M Nano

  Reference Manual for detailed CONFIG settings.

Examples:

&uart1 {

       pinctrl-names = "default";

       pinctrl-0 = <&pinctrl_uart1>;

};

iomuxc: pinctrl@30330000 {

        compatible = "fsl,imx8mn-iomuxc";

        reg = <0x0 0x30330000 0x0 0x10000>;

        pinctrl_uart1: uart1grp {

                fsl,pins = <

			MX8MN_IOMUXC_UART1_RXD_UART1_DCE_RX	0x140

			MX8MN_IOMUXC_UART1_TXD_UART1_DCE_TX	0x140

			MX8MN_IOMUXC_UART3_RXD_UART1_DCE_CTS_B	0x140

			MX8MN_IOMUXC_UART3_TXD_UART1_DCE_RTS_B	0x140

			MX8MN_IOMUXC_SD1_DATA4_GPIO2_IO6	0x19

                >;

        };

};

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/pinctrl/fsl,imx8mn-pinctrl.yaml#

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

title: Freescale IMX8MN IOMUX Controller

maintainers:

  - Anson Huang <Anson.Huang@nxp.com>

description:

  Please refer to fsl,imx-pinctrl.txt and pinctrl-bindings.txt in this directory

  for common binding part and usage.

properties:

  compatible:

    const: fsl,imx8mn-iomuxc

  reg:

    maxItems: 1

# Client device subnode's properties

patternProperties:

  'grp$':

    type: object

    description:

      Pinctrl node's client devices use subnodes for desired pin configuration.

      Client device subnodes use below standard properties.

    properties:

      fsl,pins:

        description:

          each entry consists of 6 integers and represents the mux and config

          setting for one pin. The first 5 integers <mux_reg conf_reg input_reg

          mux_val input_val> are specified using a PIN_FUNC_ID macro, which can

          be found in <arch/arm64/boot/dts/freescale/imx8mn-pinfunc.h>. The last

          integer CONFIG is the pad setting value like pull-up on this pin. Please

          refer to i.MX8M Nano Reference Manual for detailed CONFIG settings.

        allOf:

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

          - items:

              items:

                - description: |

                    "mux_reg" indicates the offset of mux register.

                - description: |

                    "conf_reg" indicates the offset of pad configuration register.

                - description: |

                    "input_reg" indicates the offset of select input register.

                - description: |

                    "mux_val" indicates the mux value to be applied.

                - description: |

                    "input_val" indicates the select input value to be applied.

                - description: |

                    "pad_setting" indicates the pad configuration value to be applied.

    required:

      - fsl,pins

    additionalProperties: false

required:

  - compatible

  - reg

additionalProperties: false

examples:

  # Pinmux controller node

  - |

    iomuxc: pinctrl@30330000 {

        compatible = "fsl,imx8mn-iomuxc";

        reg = <0x30330000 0x10000>;

        pinctrl_uart2: uart2grp {

            fsl,pins =

                <0x23C 0x4A4 0x4FC 0x0 0x0	0x140>,

                <0x240 0x4A8 0x000 0x0 0x0	0x140>;

        };

    };

...