# Copyright (c) 2022 Henrik Brix Andersen <henrik@brixandersen.dk>
# SPDX-License-Identifier: Apache-2.0

# This binding aims for compatibility with the Linux devicetree binding:
# https://www.kernel.org/doc/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.txt
# https://www.kernel.org/doc/Documentation/devicetree/bindings/pinctrl/xlnx,zynq-pinctrl.yaml

description: |
  Xilinx Zynq-7000 SoC series pinctrl node. This node will define pin multiplexing and
  configurations in groups. Each group within the pinctrl node defines the pin multiplexing and
  configuration for a peripheral, and each subgroup in the pin group defines all the pins for that
  peripheral with the same configuration properties. Pins are selected either by named pin groups
  (e.g. groups = "uart1_10_grp") or by named pins (e.g. pins = "MIO49") or a combination of
  these. The remaining properties set configuration values for those pins.

  Here is an example for UART1 pins:

  #include <zephyr/dt-bindings/pinctrl/pinctrl-zynq.h>

  &pinctrl0 {
    pinctrl_uart1_default: uart1-default {
      mux {
        groups = "uart1_10_grp";
        function = "uart1";
      };

      conf {
        groups = "uart1_10_grp";
        slew-rate = <IO_SPEED_SLOW>;
        power-source = <IO_STANDARD_LVCMOS18>;
      };

      conf-rx {
        pins = "MIO49";
        bias-high-impedance;
      };

      conf-tx {
        pins = "MIO48";
        bias-disable;
      };
    };
  };

  See the Xilinx Zynq-7000 SoC Technical Reference Manual (UG585) for further details on pin
  multiplexing and configuration options.

compatible: "xlnx,pinctrl-zynq"

include: base.yaml

properties:
  reg:
    required: true
    description: |
      Base address and size of the System Level Control Registers (SLCR) space.

  syscon:
    type: phandle
    required: true
    description: |
      phandle to the System Level Control Registers (SLCR).

child-binding:
  description: |
    Xilinx Zynq 7000 SoC pin controller pin group

  child-binding:
    description: |
      Xilinx Zynq 7000 SoC pin configuration node

    include:
      - name: pincfg-node.yaml
        property-allowlist:
          - bias-disable
          - bias-high-impedance
          - bias-pull-up
          - low-power-enable
          - low-power-disable
          - power-source
          - slew-rate

    properties:
      groups:
        type: string-array
        description: |
          Specify list of pin groups to select for this configuration node.

          Valid pin groups are "ethernet0_0_grp", "ethernet1_0_grp", "mdio0_0_grp," "mdio1_0_grp",
          "qspi0_0_grp", "qspi1_0_grp", "qspi_fbclk," "qspi_cs1_grp", "spi0_0_grp", "spi0_1_grp",
          "spi0_2_grp," "spi0_0_ss0", "spi0_0_ss1", "spi0_0_ss2", "spi0_1_ss0," "spi0_1_ss1",
          "spi0_1_ss2", "spi0_2_ss0", "spi0_2_ss1," "spi0_2_ss2", "spi1_0_grp", "spi1_1_grp",
          "spi1_2_grp," "spi1_3_grp", "spi1_0_ss0", "spi1_0_ss1", "spi1_0_ss2," "spi1_1_ss0",
          "spi1_1_ss1", "spi1_1_ss2", "spi1_2_ss0," "spi1_2_ss1", "spi1_2_ss2", "spi1_3_ss0",
          "spi1_3_ss1," "spi1_3_ss2", "sdio0_0_grp", "sdio0_1_grp", "sdio0_2_grp," "sdio1_0_grp",
          "sdio1_1_grp", "sdio1_2_grp", "sdio1_3_grp," "sdio0_emio_wp", "sdio0_emio_cd",
          "sdio1_emio_wp," "sdio1_emio_cd", "smc0_nor", "smc0_nor_cs1_grp," "smc0_nor_addr25_grp",
          "smc0_nand", "can0_0_grp", "can0_1_grp," "can0_2_grp", "can0_3_grp", "can0_4_grp",
          "can0_5_grp," "can0_6_grp", "can0_7_grp", "can0_8_grp", "can0_9_grp," "can0_10_grp",
          "can1_0_grp", "can1_1_grp", "can1_2_grp," "can1_3_grp", "can1_4_grp", "can1_5_grp",
          "can1_6_grp," "can1_7_grp", "can1_8_grp", "can1_9_grp", "can1_10_grp," "can1_11_grp",
          "uart0_0_grp", "uart0_1_grp", "uart0_2_grp," "uart0_3_grp", "uart0_4_grp", "uart0_5_grp",
          "uart0_6_grp," "uart0_7_grp", "uart0_8_grp", "uart0_9_grp", "uart0_10_grp," "uart1_0_grp",
          "uart1_1_grp", "uart1_2_grp", "uart1_3_grp," "uart1_4_grp", "uart1_5_grp", "uart1_6_grp",
          "uart1_7_grp," "uart1_8_grp", "uart1_9_grp", "uart1_10_grp", "uart1_11_grp," "i2c0_0_grp",
          "i2c0_1_grp", "i2c0_2_grp", "i2c0_3_grp," "i2c0_4_grp", "i2c0_5_grp", "i2c0_6_grp",
          "i2c0_7_grp," "i2c0_8_grp", "i2c0_9_grp", "i2c0_10_grp", "i2c1_0_grp," "i2c1_1_grp",
          "i2c1_2_grp", "i2c1_3_grp", "i2c1_4_grp," "i2c1_5_grp", "i2c1_6_grp", "i2c1_7_grp",
          "i2c1_8_grp," "i2c1_9_grp", "i2c1_10_grp", "ttc0_0_grp", "ttc0_1_grp," "ttc0_2_grp",
          "ttc1_0_grp", "ttc1_1_grp", "ttc1_2_grp," "swdt0_0_grp", "swdt0_1_grp", "swdt0_2_grp",
          "swdt0_3_grp," "swdt0_4_grp", "gpio0_0_grp", "gpio0_1_grp", "gpio0_2_grp," "gpio0_3_grp",
          "gpio0_4_grp", "gpio0_5_grp", "gpio0_6_grp," "gpio0_7_grp", "gpio0_8_grp", "gpio0_9_grp",
          "gpio0_10_grp," "gpio0_11_grp", "gpio0_12_grp", "gpio0_13_grp", "gpio0_14_grp,"
          "gpio0_15_grp", "gpio0_16_grp", "gpio0_17_grp", "gpio0_18_grp," "gpio0_19_grp",
          "gpio0_20_grp", "gpio0_21_grp", "gpio0_22_grp," "gpio0_23_grp", "gpio0_24_grp",
          "gpio0_25_grp", "gpio0_26_grp," "gpio0_27_grp", "gpio0_28_grp", "gpio0_29_grp",
          "gpio0_30_grp," "gpio0_31_grp", "gpio0_32_grp", "gpio0_33_grp", "gpio0_34_grp,"
          "gpio0_35_grp", "gpio0_36_grp", "gpio0_37_grp", "gpio0_38_grp," "gpio0_39_grp",
          "gpio0_40_grp", "gpio0_41_grp", "gpio0_42_grp," "gpio0_43_grp", "gpio0_44_grp",
          "gpio0_45_grp", "gpio0_46_grp," "gpio0_47_grp", "gpio0_48_grp", "gpio0_49_grp",
          "gpio0_50_grp," "gpio0_51_grp", "gpio0_52_grp", "gpio0_53_grp", "usb0_0_grp," "usb1_0_grp"

          Pin groups are combined with pin names (see pins) to form the full list of pins to select.

      pins:
        type: string-array
        description: |
          Specify list of pin names to select for this configuration node. Valid pin names are
          "MIO0" to "MIO53".

          Pin names are combined with pin groups (see groups) to form the full list of pins to
          select.

      function:
        type: string
        enum: ["ethernet0", "ethernet1", "mdio0", "mdio1", "qspi0", "qspi1", "qspi_fbclk",
               "qspi_cs1", "spi0", "spi0_ss", "spi1", "spi1_ss", "sdio0", "sdio0_pc",
               "sdio0_cd", "sdio0_wp", "sdio1", "sdio1_pc", "sdio1_cd", "sdio1_wp",
               "smc0_nor", "smc0_nor_cs1", "smc0_nor_addr25", "smc0_nand", "can0",
               "can1", "uart0", "uart1", "i2c0", "i2c1", "ttc0", "ttc1", "swdt0", "gpio0",
               "usb0", "usb1"]
        description: |
          Specify the alternative function to be configured for the given pin groups. Sets the
          L3_SEL, L2_SEL, L1_SEL, and L0_SEL fields in the MIO_PIN_xx SLCR register.

      bias-disable:
        description: |
          Disable any IO buffer pin bias. Clears the PULLUP and TRI_ENABLE fields in the MIO_PIN_xx
          SLCR register.

      bias-high-impedance:
        description: |
          Enables tri-state on IO buffer pin. Sets the TRI_ENABLE field in the MIO_PIN_xx SLCR
          register.

      bias-pull-up:
        description: |
          Enables pull-up on IO buffer pin. Sets the PULLUP field in the MIO_PIN_xx SLCR register.

      low-power-enable:
        description: |
          Disable HSTL input buffer to save power when it is an output-only. Applicable when
          power-source (IO_Type) is HSTL. Sets the DisableRcvr field in the MIO_PIN_xx SLCR
          register.

      low-power-disable:
        description: |
          Enable HSTL input buffer. Applicable when the power-souce (IO_Type) is HSTL. Clears the
          DisableRcvr field in the MIO_PIN_xx SLCR register.

      power-source:
        enum: [1, 2, 3, 4]
        description: |
          IO buffer type. Sets the IO_Type field in the MIO_PIN_xx SLCR register. The IO_STANDARD_*
          macros are defined in pinctrl-zynq.h.

          1 or IO_STANDARD_LVCMOS18
          2 or IO_STANDARD_LVCMOS25
          3 or IO_STANDARD_LVCMOS33
          4 or IO_STANDARD_HSTL

      slew-rate:
        enum: [0, 1]
        description: |
          IO buffer edge rate. Applicable when the power-source (IO_type) is LVCMOS18, LVCMOS25, or
          LVCMOS33. Sets the Speed field in the MIO_PIN_xx SLCR register. The IO_SPEED_* macros are
          defined in pinctrl-zynq.h.

          0 or IO_SPEED_SLOW
          1 or IO_SPEED_FAST