dts/bindings/pinctrl/quicklogic,eos-s3-pinctrl.yaml

# Copyright (c) 2023 Antmicro <www.antmicro.com>
# SPDX-License-Identifier: Apache-2.0

description: |
  Quicklogic EOS S3 IO MUX binding covers the 46 IOMUX_PAD_x_CTRL registers
  that can be used to set the direction and the function of a pad.

  Device pin configuration should be placed in the child nodes of this node.
  Populate the 'pinmux' field with IO function and pin number.

  For example, setting pins 44 and 45 for use as UART would look like this:

    #include <dt-bindings/pinctrl/quicklogic-eos-s3-pinctrl.h>

    &pinctrl {
      uart0_rx_default: uart0_rx_default {
        pinmux = <UART_RX_PAD45>;
        input-enable;
      };
      uart0_tx_default: uart0_tx_default {
        pinmux = <UART_TX_PAD44>;
        output-enable;
      };
    };

compatible: "quicklogic,eos-s3-pinctrl"

include: base.yaml

properties:
  reg:
    required: true

child-binding:
  description: |
    This binding gives a base representation of the SiFive FE310 pins
    configuration.

  include:
    - name: pincfg-node.yaml
      property-allowlist:
        - input-enable
        - output-enable
        - bias-pull-up
        - bias-pull-down
        - bias-high-impedance
        - input-schmitt-enable
        - drive-strength
  properties:
    pinmux:
      required: true
      type: array
      description: |
        Quicklogic EOS S3 pin's configuration (pin, IO function).
    slew-rate:
      description: |
        The default value "slow" matches the power-on reset value.
      default: "slow"
      type: string
      enum:
        - "slow"
        - "fast"
    quicklogic,control-selection:
      description: |
        Control selection for IO output.
        It's either controlled from registers of the A0 always-on domain,
        fabric-controlled for signaling with FPGA,
        or other-controller for bidirectional signals.
        The default value "a0registers" matches the power-on reset value.
      default: "a0registers"
      type: string
      enum:
        - "a0registers"
        - "others"
        - "fabric"