dt-bindings: pinctrl: imx93: Add pinctrl binding

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/pinctrl/fsl,imx93-pinctrl.yaml#

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

title: Freescale IMX93 IOMUX Controller

maintainers:

  - Peng Fan <peng.fan@nxp.com>

description:

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

  for common binding part and usage.

allOf:

  - $ref: "pinctrl.yaml#"

properties:

  compatible:

    const: fsl,imx93-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/imx8mp-pinfunc.h>. The last

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

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

        $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@443c0000 {

        compatible = "fsl,imx93-iomuxc";

        reg = <0x30330000 0x10000>;

        pinctrl_uart3: uart3grp {

            fsl,pins =

                <0x48 0x1f8 0x41c 0x1 0x0	0x49>,

                <0x4c 0x1fc 0x418 0x1 0x0	0x49>;

        };

    };

...