xref: /openbmc/linux/Documentation/devicetree/bindings/pinctrl/sunplus,sp7021-pinctrl.yaml (revision 49cd1dd1)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) Sunplus Co., Ltd.
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/sunplus,sp7021-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Sunplus SP7021 Pin Controller

maintainers:
  - Dvorkin Dmitry <dvorkin@tibbo.com>
  - Wells Lu <wellslutw@gmail.com>

description: |
  The Sunplus SP7021 pin controller is used to control SoC pins. Please
  refer to pinctrl-bindings.txt in this directory for details of the common
  pinctrl bindings used by client devices.

  SP7021 has 99 digital GPIO pins which are numbered from GPIO 0 to 98. All
  are multiplexed with some special function pins. SP7021 has 3 types of
  special function pins:

  (1) function-group pins:
      Ex 1 (SPI-NOR flash):
        If control-field SPI_FLASH_SEL is set to 1, GPIO 83, 84, 86 and 87
        will be pins of SPI-NOR flash. If it is set to 2, GPIO 76, 78, 79
        and 81 will be pins of SPI-NOR flash.

      Ex 2 (UART_0):
        If control-bit UA0_SEL is set to 1, GPIO 88 and 89 will be TX and
        RX pins of UART_0 (UART channel 0).

      Ex 3 (eMMC):
        If control-bit EMMC_SEL is set to 1, GPIO 72, 73, 74, 75, 76, 77,
        78, 79, 80, 81 will be pins of an eMMC device.

      Properties "function" and "groups" are used to select function-group
      pins.

  (2) fully pin-mux (like phone exchange mux) pins:
      GPIO 8 to 71 are 'fully pin-mux' pins. Any pins of peripherals of
      SP7021 (ex: UART_1, UART_2, UART_3, UART_4, I2C_0, I2C_1, and etc.)
      can be routed to any pins of fully pin-mux pins.

      Ex 1 (UART channel 1):
        If control-field UA1_TX_SEL is set to 3, TX pin of UART_1 will be
        routed to GPIO 10 (3 - 1 + 8 = 10).
        If control-field UA1_RX_SEL is set to 4, RX pin of UART_1 will be
        routed to GPIO 11 (4 - 1 + 8 = 11).
        If control-field UA1_RTS_SEL is set to 5, RTS pin of UART_1 will
        be routed to GPIO 12 (5 - 1 + 8 = 12).
        If control-field UA1_CTS_SEL is set to 6, CTS pin of UART_1 will
        be routed to GPIO 13 (6 - 1 + 8 = 13).

      Ex 2 (I2C channel 0):
        If control-field I2C0_CLK_SEL is set to 20, CLK pin of I2C_0 will
        be routed to GPIO 27 (20 - 1 + 8 = 27).
        If control-field I2C0_DATA_SEL is set to 21, DATA pin of I2C_0
        will be routed to GPIO 28 (21 - 1 + 9 = 28).

      Totally, SP7021 has 120 peripheral pins. The peripheral pins can be
      routed to any of 64 'fully pin-mux' pins.

  (3) I/O processor pins
      SP7021 has a built-in I/O processor.
      Any GPIO pins (GPIO 0 to 98) can be set to pins of I/O processor.

  Vendor property "sunplus,pins" is used to select "fully pin-mux" pins,
  "I/O processor pins" and "digital GPIO" pins.

  The device node of pin controller of Sunplus SP7021 has following
  properties.

properties:
  compatible:
    const: sunplus,sp7021-pctl

  gpio-controller: true

  '#gpio-cells':
    const: 2

  reg:
    items:
      - description: the MOON2 registers
      - description: the GPIOXT registers
      - description: the FIRST registers
      - description: the MOON1 registers

  reg-names:
    items:
      - const: moon2
      - const: gpioxt
      - const: first
      - const: moon1

  clocks:
    maxItems: 1

  resets:
    maxItems: 1

patternProperties:
  '-pins$':
    type: object
    description: |
      A pinctrl node should contain at least one subnodes representing the
      pins or function-pins group available on the machine. Each subnode
      will list the pins it needs, and how they should be configured.

      Pinctrl node's client devices use subnodes for desired pin
      configuration. Client device subnodes use below standard properties.
    $ref: pinmux-node.yaml#

    properties:
      sunplus,pins:
        description: |
          Define 'sunplus,pins' which are used by pinctrl node's client
          device.

          It consists of one or more integers which represents the config
          setting for corresponding pin. Each integer defines a individual
          pin in which:

          Bit 32~24: defines GPIO number. Its range is 0 ~ 98.
          Bit 23~16: defines types: (1) fully pin-mux pins
                                    (2) IO processor pins
                                    (3) digital GPIO pins
          Bit 15~8:  defines pins of peripherals (which are defined in
                     'include/dt-binging/pinctrl/sppctl.h').
          Bit 7~0:   defines types or initial-state of digital GPIO pins.

          Please use macro SPPCTL_IOPAD to define the integers for pins.

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

      function:
        description: |
          Define pin-function which is used by pinctrl node's client device.
          The name should be one of string in the following enumeration.
        $ref: /schemas/types.yaml#/definitions/string
        enum: [ SPI_FLASH, SPI_FLASH_4BIT, SPI_NAND, CARD0_EMMC, SD_CARD,
                UA0, FPGA_IFX, HDMI_TX, LCDIF, USB0_OTG, USB1_OTG ]

      groups:
        description: |
          Define pin-group in a specified pin-function.
          The name should be one of string in the following enumeration.
        $ref: /schemas/types.yaml#/definitions/string
        enum: [ SPI_FLASH1, SPI_FLASH2, SPI_FLASH_4BIT1, SPI_FLASH_4BIT2,
                SPI_NAND, CARD0_EMMC, SD_CARD, UA0, FPGA_IFX, HDMI_TX1,
                HDMI_TX2, HDMI_TX3, LCDIF, USB0_OTG, USB1_OTG ]

      sunplus,zerofunc:
        description: |
          This is a vendor specific property. It is used to disable pins
          which are not used by pinctrl node's client device.
          Some pins may be enabled by boot-loader. We can use this
          property to disable them.
        $ref: /schemas/types.yaml#/definitions/uint32-array

    additionalProperties: false

    allOf:
      - if:
          properties:
            function:
              enum:
                - SPI_FLASH
        then:
          properties:
            groups:
              enum:
                - SPI_FLASH1
                - SPI_FLASH2
      - if:
          properties:
            function:
              enum:
                - SPI_FLASH_4BIT
        then:
          properties:
            groups:
              enum:
                - SPI_FLASH_4BIT1
                - SPI_FLASH_4BIT2
      - if:
          properties:
            function:
              enum:
                - SPI_NAND
        then:
          properties:
            groups:
              enum:
                - SPI_NAND
      - if:
          properties:
            function:
              enum:
                - CARD0_EMMC
        then:
          properties:
            groups:
              enum:
                - CARD0_EMMC
      - if:
          properties:
            function:
              enum:
                - SD_CARD
        then:
          properties:
            groups:
              enum:
                - SD_CARD
      - if:
          properties:
            function:
              enum:
                - UA0
        then:
          properties:
            groups:
              enum:
                - UA0
      - if:
          properties:
            function:
              enum:
                - FPGA_IFX
        then:
          properties:
            groups:
              enum:
                - FPGA_IFX
      - if:
          properties:
            function:
              enum:
                - HDMI_TX
        then:
          properties:
            groups:
              enum:
                - HDMI_TX1
                - HDMI_TX2
                - HDMI_TX3
      - if:
          properties:
            function:
              enum:
                - LCDIF
        then:
          properties:
            groups:
              enum:
                - LCDIF
      - if:
          properties:
            function:
              enum:
                - USB0_OTG
        then:
          properties:
            groups:
              enum:
                - USB0_OTG
      - if:
          properties:
            function:
              enum:
                - USB1_OTG
        then:
          properties:
            groups:
              enum:
                - USB1_OTG

required:
  - compatible
  - reg
  - reg-names
  - "#gpio-cells"
  - gpio-controller
  - clocks
  - resets

additionalProperties: false

allOf:
  - $ref: pinctrl.yaml#

examples:
  - |
    #include <dt-bindings/pinctrl/sppctl-sp7021.h>

    pinctrl@9c000100 {
        compatible = "sunplus,sp7021-pctl";
        reg = <0x9c000100 0x100>, <0x9c000300 0x100>,
              <0x9c0032e4 0x1c>, <0x9c000080 0x20>;
        reg-names = "moon2", "gpioxt", "first", "moon1";
        gpio-controller;
        #gpio-cells = <2>;
        clocks = <&clkc 0x83>;
        resets = <&rstc 0x73>;

        uart0-pins {
            function = "UA0";
            groups = "UA0";
        };

        spinand0-pins {
            function = "SPI_NAND";
            groups = "SPI_NAND";
        };

        uart1-pins {
            sunplus,pins = <
                SPPCTL_IOPAD(11, SPPCTL_PCTL_G_PMUX, MUXF_UA1_TX, 0)
                SPPCTL_IOPAD(10, SPPCTL_PCTL_G_PMUX, MUXF_UA1_RX, 0)
            >;
        };

        uart2-pins {
            sunplus,pins = <
                SPPCTL_IOPAD(20, SPPCTL_PCTL_G_PMUX, MUXF_UA1_TX, 0)
                SPPCTL_IOPAD(21, SPPCTL_PCTL_G_PMUX, MUXF_UA1_RX, 0)
                SPPCTL_IOPAD(22, SPPCTL_PCTL_G_PMUX, MUXF_UA1_RTS, 0)
                SPPCTL_IOPAD(23, SPPCTL_PCTL_G_PMUX, MUXF_UA1_CTS, 0)
            >;
        };

        emmc-pins {
            function = "CARD0_EMMC";
            groups = "CARD0_EMMC";
        };

        sdcard-pins {
            function = "SD_CARD";
            groups = "SD_CARD";
            sunplus,pins = < SPPCTL_IOPAD(91, SPPCTL_PCTL_G_GPIO, 0, 0) >;
        };

        hdmi_A_tx1-pins {
            function = "HDMI_TX";
            groups = "HDMI_TX1";
        };
        hdmi_A_tx2-pins {
            function = "HDMI_TX";
            groups = "HDMI_TX2";
        };
        hdmi_A_tx3-pins {
            function = "HDMI_TX";
            groups = "HDMI_TX3";
        };

        ethernet-pins {
            sunplus,pins = <
                SPPCTL_IOPAD(49,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_CLK_OUT,0)
                SPPCTL_IOPAD(44,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_MAC_SMI_MDC,0)
                SPPCTL_IOPAD(43,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_MAC_SMI_MDIO,0)
                SPPCTL_IOPAD(52,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_P0_MAC_RMII_TXEN,0)
                SPPCTL_IOPAD(50,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_P0_MAC_RMII_TXD0,0)
                SPPCTL_IOPAD(51,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_P0_MAC_RMII_TXD1,0)
                SPPCTL_IOPAD(46,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_P0_MAC_RMII_CRSDV,0)
                SPPCTL_IOPAD(47,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_P0_MAC_RMII_RXD0,0)
                SPPCTL_IOPAD(48,SPPCTL_PCTL_G_PMUX,MUXF_L2SW_P0_MAC_RMII_RXD1,0)
            >;
            sunplus,zerofunc = <
                MUXF_L2SW_LED_FLASH0
                MUXF_L2SW_LED_ON0
                MUXF_L2SW_P0_MAC_RMII_RXER
            >;
        };
    };
...