# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
# Copyright 2023 Realtek Semiconductor Corporation
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/realtek,rtd1315e-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Realtek DHC RTD1315E Pin Controller

maintainers:
  - TY Chang <tychang@realtek.com>

description:
  The Realtek DHC RTD1315E is a high-definition media processor SoC. The
  RTD1315E pin controller is used to control pin function, pull up/down
  resistor, drive strength, schmitt trigger and power source.

properties:
  compatible:
    const: realtek,rtd1315e-pinctrl

  reg:
    maxItems: 1

patternProperties:
  '-pins$':
    type: object
    allOf:
      - $ref: pincfg-node.yaml#
      - $ref: pinmux-node.yaml#

    properties:
      pins:
        items:
          enum: [ gpio_0, gpio_1, emmc_rst_n, emmc_dd_sb, emmc_clk, emmc_cmd,
                  gpio_6, gpio_7, gpio_8, gpio_9, gpio_10, gpio_11, gpio_12,
                  gpio_13, gpio_14, gpio_15, gpio_16, gpio_17, gpio_18, gpio_19,
                  gpio_20, emmc_data_0, emmc_data_1, emmc_data_2, usb_cc2, gpio_25,
                  gpio_26, gpio_27, gpio_28, gpio_29, gpio_30, gpio_31, gpio_32,
                  gpio_33, gpio_34, gpio_35, hif_data, hif_en, hif_rdy, hif_clk,
                  gpio_dummy_40, gpio_dummy_41, gpio_dummy_42, gpio_dummy_43,
                  gpio_dummy_44, gpio_dummy_45, gpio_46, gpio_47, gpio_48, gpio_49,
                  gpio_50, usb_cc1, emmc_data_3, emmc_data_4, ir_rx, ur0_rx, ur0_tx,
                  gpio_57, gpio_58, gpio_59, gpio_60, gpio_61, gpio_62, gpio_dummy_63,
                  gpio_dummy_64, gpio_dummy_65, gpio_66, gpio_67, gpio_68, gpio_69,
                  gpio_70, gpio_71, gpio_72, gpio_dummy_73, emmc_data_5, emmc_data_6,
                  emmc_data_7, gpio_dummy_77, gpio_78, gpio_79, gpio_80, gpio_81,
                  ur2_loc, gspi_loc, hi_width, sf_en, arm_trace_dbg_en,
                  ejtag_aucpu_loc, ejtag_acpu_loc, ejtag_vcpu_loc, ejtag_scpu_loc,
                  dmic_loc, vtc_dmic_loc, vtc_tdm_loc, vtc_i2si_loc, tdm_ai_loc,
                  ai_loc, spdif_loc, hif_en_loc, scan_switch, wd_rset, boot_sel,
                  reset_n, testmode ]

      function:
        enum: [ gpio, nf, emmc, ao, gspi_loc0, gspi_loc1, uart0, uart1,
                uart2_loc0, uart2_loc1, i2c0, i2c1, i2c4, i2c5, pcie1,
                etn_led, etn_phy, spi, pwm0_loc0, pwm0_loc1, pwm1_loc0,
                pwm1_loc1, pwm2_loc0, pwm2_loc1, pwm3_loc0, pwm3_loc1,
                spdif_optical_loc0, spdif_optical_loc1, usb_cc1, usb_cc2,
                sd, dmic_loc0, dmic_loc1, ai_loc0, ai_loc1, tdm_ai_loc0,
                tdm_ai_loc1, hi_loc0, hi_m, vtc_i2so, vtc_i2si_loc0,
                vtc_i2si_loc1, vtc_dmic_loc0, vtc_dmic_loc1, vtc_tdm_loc0,
                vtc_tdm_loc1, dc_fan, pll_test_loc0, pll_test_loc1,
                ir_rx, uart2_disable, gspi_disable, hi_width_disable,
                hi_width_1bit, sf_disable, sf_enable, scpu_ejtag_loc0,
                scpu_ejtag_loc1, scpu_ejtag_loc2, scpu_ejtag_loc3,
                acpu_ejtag_loc0, acpu_ejtag_loc1, acpu_ejtag_loc2,
                vcpu_ejtag_loc0, vcpu_ejtag_loc1, vcpu_ejtag_loc2,
                aucpu_ejtag_loc0, aucpu_ejtag_loc1, aucpu_ejtag_loc2,
                gpu_ejtag, iso_tristate, dbg_out0, dbg_out1, standby_dbg,
                spdif, arm_trace_debug_disable, arm_trace_debug_enable,
                aucpu_ejtag_disable, acpu_ejtag_disable, vcpu_ejtag_disable,
                scpu_ejtag_disable, vtc_dmic_loc_disable, vtc_tdm_disable,
                vtc_i2si_disable, tdm_ai_disable, ai_disable, spdif_disable,
                hif_disable, hif_enable, test_loop, pmic_pwrup ]

      drive-strength:
        enum: [4, 8]

      bias-pull-down: true

      bias-pull-up: true

      bias-disable: true

      input-schmitt-enable: true

      input-schmitt-disable: true

      drive-push-pull: true

      power-source:
        description: |
          Valid arguments are described as below:
          0: power supply of 1.8V
          1: power supply of 3.3V
        enum: [0, 1]

      realtek,drive-strength-p:
        description: |
          Some of pins can be driven using the P-MOS and N-MOS transistor to
          achieve finer adjustments. The block-diagram representation is as
          follows:
                         VDD
                          |
                      ||--+
               +-----o||     P-MOS-FET
               |      ||--+
          IN --+          +----- out
               |      ||--+
               +------||     N-MOS-FET
                      ||--+
                          |
                         GND
          The driving strength of the P-MOS/N-MOS transistors impacts the
          waveform's rise/fall times. Greater driving strength results in
          shorter rise/fall times. Each P-MOS and N-MOS transistor offers
          8 configurable levels (0 to 7), with higher values indicating
          greater driving strength, contributing to achieving the desired
          speed.
 
          The realtek,drive-strength-p is used to control the driving strength
          of the P-MOS output.
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 7

      realtek,drive-strength-n:
        description: |
          Similar to the realtek,drive-strength-p, the realtek,drive-strength-n
          is used to control the driving strength of the N-MOS output.
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 7

      realtek,duty-cycle:
        description: |
          An integer describing the level to adjust output duty cycle, controlling
          the proportion of positive and negative waveforms in nanoseconds.
          Valid arguments are described as below:
          0: 0ns
          2: + 0.25ns
          3: + 0.5ns
          4: -0.25ns
          5: -0.5ns
        $ref: /schemas/types.yaml#/definitions/uint32
        enum: [ 0, 2, 3, 4, 5 ]

    required:
      - pins

    additionalProperties: false

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
     pinctrl@4e000 {
         compatible = "realtek,rtd1315e-pinctrl";
         reg = <0x4e000 0x130>;
 
         emmc-hs200-pins {
             pins = "emmc_clk",
                    "emmc_cmd",
                    "emmc_data_0",
                    "emmc_data_1",
                    "emmc_data_2",
                    "emmc_data_3",
                    "emmc_data_4",
                    "emmc_data_5",
                    "emmc_data_6",
                    "emmc_data_7";
             function = "emmc";
             realtek,drive-strength-p = <0x2>;
             realtek,drive-strength-n = <0x2>;
         };
 
         i2c-0-pins {
             pins = "gpio_12",
                    "gpio_13";
             function = "i2c0";
             drive-strength = <4>;
         };
     };