# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/xlnx,zynqmp-ams.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Xilinx Zynq Ultrascale AMS controller

maintainers:
  - Anand Ashok Dumbre <anand.ashok.dumbre@xilinx.com>

description: |
  The AMS (Analog Monitoring System) includes an ADC as well as on-chip sensors
  that can be used to sample external voltages and monitor on-die operating
  conditions, such as temperature and supply voltage levels.
  The AMS has two SYSMON blocks which are PL (Programmable Logic) SYSMON and
  PS (Processing System) SYSMON.
  All designs should have AMS registers, but PS and PL are optional. The
  AMS controller can work with only PS, only PL and both PS and PL
  configurations. Please specify registers according to your design. Devicetree
  should always have AMS module property. Providing PS & PL module is optional.

  AMS Channel Details
  ```````````````````
  Sysmon Block  |Channel|                       Details                                 |Measurement
                |Number |                                                               |Type
  ---------------------------------------------------------------------------------------------------------
  AMS CTRL      |0      |System PLLs voltage measurement, VCC_PSPLL.                    |Voltage
                |1      |Battery voltage measurement, VCC_PSBATT.                       |Voltage
                |2      |PL Internal voltage measurement, VCCINT.                       |Voltage
                |3      |Block RAM voltage measurement, VCCBRAM.                        |Voltage
                |4      |PL Aux voltage measurement, VCCAUX.                            |Voltage
                |5      |Voltage measurement for six DDR I/O PLLs, VCC_PSDDR_PLL.       |Voltage
                |6      |VCC_PSINTFP_DDR voltage measurement.                           |Voltage
  ---------------------------------------------------------------------------------------------------------
  PS Sysmon     |7      |LPD temperature measurement.                                   |Temperature
                |8      |FPD temperature measurement (REMOTE).                          |Temperature
                |9      |VCC PS LPD voltage measurement (supply1).                      |Voltage
                |10     |VCC PS FPD voltage measurement (supply2).                      |Voltage
                |11     |PS Aux voltage reference (supply3).                            |Voltage
                |12     |DDR I/O VCC voltage measurement.                               |Voltage
                |13     |PS IO Bank 503 voltage measurement (supply5).                  |Voltage
                |14     |PS IO Bank 500 voltage measurement (supply6).                  |Voltage
                |15     |VCCO_PSIO1 voltage measurement.                                |Voltage
                |16     |VCCO_PSIO2 voltage measurement.                                |Voltage
                |17     |VCC_PS_GTR voltage measurement (VPS_MGTRAVCC).                 |Voltage
                |18     |VTT_PS_GTR voltage measurement (VPS_MGTRAVTT).                 |Voltage
                |19     |VCC_PSADC voltage measurement.                                 |Voltage
  ---------------------------------------------------------------------------------------------------------
  PL Sysmon     |20     |PL temperature measurement.                                    |Temperature
                |21     |PL Internal voltage measurement, VCCINT.                       |Voltage
                |22     |PL Auxiliary voltage measurement, VCCAUX.                      |Voltage
                |23     |ADC Reference P+ voltage measurement.                          |Voltage
                |24     |ADC Reference N- voltage measurement.                          |Voltage
                |25     |PL Block RAM voltage measurement, VCCBRAM.                     |Voltage
                |26     |LPD Internal voltage measurement, VCC_PSINTLP (supply4).       |Voltage
                |27     |FPD Internal voltage measurement, VCC_PSINTFP (supply5).       |Voltage
                |28     |PS Auxiliary voltage measurement (supply6).                    |Voltage
                |29     |PL VCCADC voltage measurement (vccams).                        |Voltage
                |30     |Differential analog input signal voltage measurement.          |Voltage
                |31     |VUser0 voltage measurement (supply7).                          |Voltage
                |32     |VUser1 voltage measurement (supply8).                          |Voltage
                |33     |VUser2 voltage measurement (supply9).                          |Voltage
                |34     |VUser3 voltage measurement (supply10).                         |Voltage
                |35     |Auxiliary ch 0 voltage measurement (VAux0).                    |Voltage
                |36     |Auxiliary ch 1 voltage measurement (VAux1).                    |Voltage
                |37     |Auxiliary ch 2 voltage measurement (VAux2).                    |Voltage
                |38     |Auxiliary ch 3 voltage measurement (VAux3).                    |Voltage
                |39     |Auxiliary ch 4 voltage measurement (VAux4).                    |Voltage
                |40     |Auxiliary ch 5 voltage measurement (VAux5).                    |Voltage
                |41     |Auxiliary ch 6 voltage measurement (VAux6).                    |Voltage
                |42     |Auxiliary ch 7 voltage measurement (VAux7).                    |Voltage
                |43     |Auxiliary ch 8 voltage measurement (VAux8).                    |Voltage
                |44     |Auxiliary ch 9 voltage measurement (VAux9).                    |Voltage
                |45     |Auxiliary ch 10 voltage measurement (VAux10).                  |Voltage
                |46     |Auxiliary ch 11 voltage measurement (VAux11).                  |Voltage
                |47     |Auxiliary ch 12 voltage measurement (VAux12).                  |Voltage
                |48     |Auxiliary ch 13 voltage measurement (VAux13).                  |Voltage
                |49     |Auxiliary ch 14 voltage measurement (VAux14).                  |Voltage
                |50     |Auxiliary ch 15 voltage measurement (VAux15).                  |Voltage
  --------------------------------------------------------------------------------------------------------

properties:
  compatible:
    enum:
      - xlnx,zynqmp-ams

  interrupts:
    maxItems: 1

  reg:
    description: AMS Controller register space
    maxItems: 1

  clocks:
    items:
      - description: AMS reference clock

  ranges:
    description:
      Maps the child address space for PS and/or PL.
    maxItems: 1

  '#address-cells':
    const: 1

  '#size-cells':
    const: 1

  '#io-channel-cells':
    const: 1

  ams-ps@0:
    type: object
    description: |
      PS (Processing System) SYSMON is memory mapped to PS. This block has
      built-in alarm generation logic that is used to interrupt the processor
      based on condition set.

    properties:
      compatible:
        enum:
          - xlnx,zynqmp-ams-ps

      reg:
        description: Register Space for PS-SYSMON
        maxItems: 1

    required:
      - compatible
      - reg

    additionalProperties: false

  ams-pl@400:
    type: object
    additionalProperties: false
    description:
      PL-SYSMON is capable of monitoring off chip voltage and temperature.
      PL-SYSMON block has DRP, JTAG and I2C interface to enable monitoring
      from external master. Out of this interface currently only DRP is
      supported. This block has alarm generation logic that is used to
      interrupt the processor based on condition set.

    properties:
      compatible:
        items:
          - enum:
              - xlnx,zynqmp-ams-pl

      reg:
        description: Register Space for PL-SYSMON.
        maxItems: 1

      '#address-cells':
        const: 1

      '#size-cells':
        const: 0

    patternProperties:
      "^channel@([2-4][0-9]|50)$":
        type: object
        description:
          Describes the external channels connected.

        properties:
          reg:
            description:
              Pair of pins the channel is connected to. This value is
              same as Channel Number for a particular channel.
            minimum: 20
            maximum: 50

          xlnx,bipolar:
            $ref: /schemas/types.yaml#/definitions/flag
            type: boolean
            description:
              If the set channel is used in bipolar mode.

        required:
          - reg

        additionalProperties: false

required:
  - compatible
  - reg
  - clocks
  - ranges

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/xlnx-zynqmp-clk.h>

    bus {
        #address-cells = <2>;
        #size-cells = <2>;

        xilinx_ams: ams@ffa50000 {
            compatible = "xlnx,zynqmp-ams";
            interrupt-parent = <&gic>;
            interrupts = <0 56 4>;
            reg = <0x0 0xffa50000 0x0 0x800>;
            clocks = <&zynqmp_clk AMS_REF>;
            #address-cells = <1>;
            #size-cells = <1>;
            #io-channel-cells = <1>;
            ranges = <0 0 0xffa50800 0x800>;

            ams_ps: ams-ps@0 {
                compatible = "xlnx,zynqmp-ams-ps";
                reg = <0 0x400>;
            };

            ams_pl: ams-pl@400 {
                compatible = "xlnx,zynqmp-ams-pl";
                reg = <0x400 0x400>;
                #address-cells = <1>;
                #size-cells = <0>;
                channel@30 {
                    reg = <30>;
                    xlnx,bipolar;
                };
                channel@31 {
                    reg = <31>;
                };
                channel@38 {
                    reg = <38>;
                    xlnx,bipolar;
                };
            };
        };
    };