xref: /linux/Documentation/devicetree/bindings/pinctrl/aspeed,ast2700-soc0-pinctrl.yaml (revision 53c7db5c1916afcecc8683ae01ff8415c708a883)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/aspeed,ast2700-soc0-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ASPEED AST2700 SoC0 Pin Controller

maintainers:
  - Billy Tsai <billy_tsai@aspeedtech.com>

description: >
  The AST2700 features a dual-SoC architecture with two interconnected SoCs,
  each having its own System Control Unit (SCU) for independent pin control.
  This pin controller manages the pin multiplexing for SoC0.

  The SoC0 pin controller manages pin functions including eMMC, VGA DDC,
  dual USB3/USB2 ports (A and B), JTAG, and PCIe root complex interfaces.

properties:
  compatible:
    const: aspeed,ast2700-soc0-pinctrl

  reg:
    maxItems: 1

patternProperties:
  '-state$':
    description: |
      Pin control state.

      If 'function' is present, the node describes a pinmux state and must
      specify 'groups'.

      For pin configuration, exactly one of 'groups' or 'pins' must be
      specified in each state node. Group-level configuration applies to all
      pins in the group. Pin-level configuration may be supplied in a
      separate state node for individual pins; when both group-level and
      pin-level configuration apply to the same pin, the pin-level
      configuration takes precedence.

    type: object
    allOf:
      - $ref: pinmux-node.yaml#
      - $ref: pincfg-node.yaml#
      - if:
          required:
            - function
        then:
          required:
            - groups
      - oneOf:
          - required:
              - groups
          - required:
              - pins

    additionalProperties: false

    properties:
      function:
        enum:
          - EMMC
          - JTAGDDR
          - JTAGM0
          - JTAGPCIEA
          - JTAGPCIEB
          - JTAGPSP
          - JTAGSSP
          - JTAGTSP
          - JTAGUSB3A
          - JTAGUSB3B
          - PCIERC0PERST
          - PCIERC1PERST
          - TSPRSTN
          - UFSCLKI
          - USB2AD0
          - USB2AD1
          - USB2AH
          - USB2AHP
          - USB2AHPD0
          - USB2AXH
          - USB2AXH2B
          - USB2AXHD1
          - USB2AXHP
          - USB2AXHP2B
          - USB2AXHPD1
          - USB2BD0
          - USB2BD1
          - USB2BH
          - USB2BHP
          - USB2BHPD0
          - USB2BXH
          - USB2BXH2A
          - USB2BXHD1
          - USB2BXHP
          - USB2BXHP2A
          - USB2BXHPD1
          - USB3AXH
          - USB3AXH2B
          - USB3AXHD
          - USB3AXHP
          - USB3AXHP2B
          - USB3AXHPD
          - USB3BXH
          - USB3BXH2A
          - USB3BXHD
          - USB3BXHP
          - USB3BXHP2A
          - USB3BXHPD
          - VB
          - VGADDC

      groups:
        enum:
          - EMMCCDN
          - EMMCG1
          - EMMCG4
          - EMMCG8
          - EMMCWPN
          - JTAG0
          - PCIERC0PERST
          - PCIERC1PERST
          - TSPRSTN
          - UFSCLKI
          - USB2A
          - USB2AAP
          - USB2ABP
          - USB2ADAP
          - USB2AH
          - USB2AHAP
          - USB2B
          - USB2BAP
          - USB2BBP
          - USB2BDBP
          - USB2BH
          - USB2BHBP
          - USB3A
          - USB3AAP
          - USB3ABP
          - USB3B
          - USB3BAP
          - USB3BBP
          - VB0
          - VB1
          - VGADDC

      pins:
        enum:
          - AB13
          - AB14
          - AC13
          - AC14
          - AD13
          - AD14
          - AE13
          - AE14
          - AE15
          - AF13
          - AF14
          - AF15

      drive-strength:
        enum: [3, 6, 8, 11, 16, 18, 20, 23, 30, 32, 33, 35, 37, 38, 39, 41]

      bias-disable: true
      bias-pull-up: true
      bias-pull-down: true

required:
  - compatible
  - reg

allOf:
  - $ref: pinctrl.yaml#

additionalProperties: false

examples:
  - |
    pinctrl@400 {
        compatible = "aspeed,ast2700-soc0-pinctrl";
        reg = <0x400 0x318>;
        emmc-state {
            function = "EMMC";
            groups = "EMMCG1";
        };
    };