linuxdebug/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/arm/tegra/nvidia,tegra186-pmc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra Power Management Controller (PMC)

maintainers:
  - Thierry Reding <thierry.reding@gmail.com>
  - Jon Hunter <jonathanh@nvidia.com>

properties:
  compatible:
    enum:
      - nvidia,tegra186-pmc
      - nvidia,tegra194-pmc
      - nvidia,tegra234-pmc

  reg:
    minItems: 4
    maxItems: 5

  reg-names:
    minItems: 4
    items:
      - const: pmc
      - const: wake
      - const: aotag
      - const: scratch
      - const: misc

  interrupt-controller: true

  "#interrupt-cells":
    description: Specifies the number of cells needed to encode an
      interrupt source. The value must be 2.
    const: 2

  nvidia,invert-interrupt:
    description: If present, inverts the PMU interrupt signal.
    $ref: /schemas/types.yaml#/definitions/flag

if:
  properties:
    compatible:
      contains:
        const: nvidia,tegra186-pmc
then:
  properties:
    reg:
      maxItems: 4

    reg-names:
      maxItems: 4
else:
  properties:
    reg:
      minItems: 5

    reg-names:
      minItems: 5

patternProperties:
  "^[a-z0-9]+-[a-z0-9]+$":
    if:
      type: object
    then:
      description: |
        These are pad configuration nodes. On Tegra SoCs a pad is a set of
        pins which are configured as a group. The pin grouping is a fixed
        attribute of the hardware. The PMC can be used to set pad power
        state and signaling voltage. A pad can be either in active or
        power down mode. The support for power state and signaling voltage
        configuration varies depending on the pad in question. 3.3 V and
        1.8 V signaling voltages are supported on pins where software
        controllable signaling voltage switching is available.

        Pad configurations are described with pin configuration nodes
        which are placed under the pmc node and they are referred to by
        the pinctrl client properties. For more information see

          Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt

        The following pads are present on Tegra186:

          csia, csib, dsi, mipi-bias, pex-clk-bias, pex-clk3, pex-clk2,
          pex-clk1, usb0, usb1, usb2, usb-bias, uart, audio, hsic, dbg,
          hdmi-dp0, hdmi-dp1, pex-cntrl, sdmmc2-hv, sdmmc4, cam, dsib,
          dsic, dsid, csic, csid, csie, dsif, spi, ufs, dmic-hv, edp,
          sdmmc1-hv, sdmmc3-hv, conn, audio-hv, ao-hv

        The following pads are present on Tegra194:

          csia, csib, mipi-bias, pex-clk-bias, pex-clk3, pex-clk2,
          pex-clk1, eqos, pex-clk-2-bias, pex-clk-2, dap3, dap5, uart,
          pwr-ctl, soc-gpio53, audio, gp-pwm2, gp-pwm3, soc-gpio12,
          soc-gpio13, soc-gpio10, uart4, uart5, dbg, hdmi-dp3, hdmi-dp2,
          hdmi-dp0, hdmi-dp1, pex-cntrl, pex-ctl2, pex-l0-rst,
          pex-l1-rst, sdmmc4, pex-l5-rst, cam, csic, csid, csie, csif,
          spi, ufs, csig, csih, edp, sdmmc1-hv, sdmmc3-hv, conn,
          audio-hv, ao-hv        

      properties:
        pins:
          $ref: /schemas/types.yaml#/definitions/string
          description: Must contain the name of the pad(s) to be
            configured.

        low-power-enable:
          description: Configure the pad into power down mode.
          $ref: /schemas/types.yaml#/definitions/flag

        low-power-disable:
          description: Configure the pad into active mode.
          $ref: /schemas/types.yaml#/definitions/flag

        power-source:
          $ref: /schemas/types.yaml#/definitions/uint32
          description: |
            Must contain either TEGRA_IO_PAD_VOLTAGE_1V8 or
            TEGRA_IO_PAD_VOLTAGE_3V3 to select between signalling
            voltages.

            The values are defined in

              include/dt-bindings/pinctrl/pinctrl-tegra-io-pad.h

            The power state can be configured on all of the above pads
            except for ao-hv. Following pads have software configurable
            signaling voltages: sdmmc2-hv, dmic-hv, sdmmc1-hv, sdmmc3-hv,
            audio-hv, ao-hv.            

        phandle: true

      required:
        - pins

      additionalProperties: false

required:
  - compatible
  - reg
  - reg-names

additionalProperties: false

dependencies:
  interrupt-controller: ['#interrupt-cells']
  "#interrupt-cells":
    required:
      - interrupt-controller

examples:
  - |
    #include <dt-bindings/clock/tegra186-clock.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h>
    #include <dt-bindings/memory/tegra186-mc.h>
    #include <dt-bindings/reset/tegra186-reset.h>

    pmc@c3600000 {
        compatible = "nvidia,tegra186-pmc";
        reg = <0x0c360000 0x10000>,
              <0x0c370000 0x10000>,
              <0x0c380000 0x10000>,
              <0x0c390000 0x10000>;
        reg-names = "pmc", "wake", "aotag", "scratch";
        nvidia,invert-interrupt;

        sdmmc1_3v3: sdmmc1-3v3 {
            pins = "sdmmc1-hv";
            power-source = <TEGRA_IO_PAD_VOLTAGE_3V3>;
        };

        sdmmc1_1v8: sdmmc1-1v8 {
            pins = "sdmmc1-hv";
            power-source = <TEGRA_IO_PAD_VOLTAGE_1V8>;
        };
    };

    sdmmc1: mmc@3400000 {
        compatible = "nvidia,tegra186-sdhci";
        reg = <0x03400000 0x10000>;
        interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&bpmp TEGRA186_CLK_SDMMC1>,
                 <&bpmp TEGRA186_CLK_SDMMC_LEGACY_TM>;
        clock-names = "sdhci", "tmclk";
        resets = <&bpmp TEGRA186_RESET_SDMMC1>;
        reset-names = "sdhci";
        interconnects = <&mc TEGRA186_MEMORY_CLIENT_SDMMCRA &emc>,
                        <&mc TEGRA186_MEMORY_CLIENT_SDMMCWA &emc>;
        interconnect-names = "dma-mem", "write";
        iommus = <&smmu TEGRA186_SID_SDMMC1>;
        pinctrl-names = "sdmmc-3v3", "sdmmc-1v8";
        pinctrl-0 = <&sdmmc1_3v3>;
        pinctrl-1 = <&sdmmc1_1v8>;
    };