xref: /linux/Documentation/devicetree/bindings/mfd/maxim,max77620.yaml (revision 0fc8f6200d2313278fbf4539bbab74677c685531)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/maxim,max77620.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: MAX77620 Power management IC from Maxim Semiconductor

maintainers:
  - Svyatoslav Ryhel <clamor95@gmail.com>

properties:
  compatible:
    enum:
      - maxim,max20024
      - maxim,max77620
      - maxim,max77663

  reg:
    description:
      Can contain an optional second I2C address pointing to the PMIC's
      RTC device. If no RTC address is provided, a default address specific
      to this PMIC will be used.
    minItems: 1
    maxItems: 2

  reg-names:
    items:
      - const: pmic
      - const: rtc

  interrupts:
    maxItems: 1

  interrupt-controller: true

  "#interrupt-cells":
    const: 2

  gpio-controller: true

  "#gpio-cells":
    const: 2
    description:
      Device has 8 GPIO pins which can be configured as GPIO as well as
      the special IO functions. The first cell is the pin number, and the
      second cell is used to specify the gpio polarity (GPIO_ACTIVE_HIGH or
      GPIO_ACTIVE_LOW).

  system-power-controller: true

  "#thermal-sensor-cells":
    const: 0
    description:
      Maxim Semiconductor MAX77620 supports alarm interrupts when its
      die temperature crosses 120C and 140C. These threshold temperatures
      are not configurable. Device does not provide the real temperature
      of die other than just indicating whether temperature is above or
      below threshold level.

  fps:
    type: object
    additionalProperties: false
    description: |
      The Flexible Power Sequencer (FPS) allows each regulator to power up
      under hardware or software control. Additionally, each regulator can
      power on independently or among a group of other regulators with an
      adjustable power-up and power-down delays (sequencing). GPIO1, GPIO2,
      and GPIO3 can be programmed to be part of a sequence allowing external
      regulators to be sequenced along with internal regulators. 32KHz clock
      can be programmed to be part of a sequence.

      The flexible sequencing structure consists of two hardware enable inputs
      (EN0, EN1), and 3 master sequencing timers called FPS0, FPS1 and FPS2.
      Each master sequencing timer is programmable through its configuration
      register to have a hardware enable source (EN1 or EN2) or a software enable
      source (SW). When enabled/disabled, the master sequencing timer generates
      eight sequencing events on different time periods called slots. The time
      period between each event is programmable within the configuration register.
      Each regulator, GPIO1, GPIO2, GPIO3, and 32KHz clock has a flexible power
      sequence slave register which allows its enable source to be specified as
      a flexible power sequencer timer or a software bit. When a FPS source of
      regulators, GPIOs and clocks specifies the enable source to be a flexible
      power sequencer, the power up and power down delays can be specified in
      the regulators, GPIOs and clocks flexible power sequencer configuration
      registers.

      When FPS event cleared (set to LOW), regulators, GPIOs and 32KHz clock
      are set into following state at the sequencing event that corresponds
      to its flexible sequencer configuration register.

      Sleep state: In this state, regulators, GPIOs and 32KHz clock get disabled
                   at the sequencing event.
      Global Low Power Mode (GLPM): In this state, regulators are set in low
                                    power mode at the sequencing event.

      The configuration parameters of FPS is provided through sub-node "fps"
      and their child for FPS specific. The child node name for FPS are "fps0",
      "fps1", and "fps2" for FPS0, FPS1 and FPS2 respectively.

      The FPS configurations like FPS source, power up and power down slots for
      regulators, GPIOs and 32kHz clocks are provided in their respective
      configuration nodes which is explained in respective sub-system DT
      binding document.

      There is need for different FPS configuration parameters based on system
      state like when system state changed from active to suspend or active to
      power off (shutdown).

    patternProperties:
      "^fps[0-2]$":
        type: object
        additionalProperties: false

        properties:
          maxim,fps-event-source:
            $ref: /schemas/types.yaml#/definitions/uint32
            description: |
              FPS event source like external hardware input to PMIC i.e. EN0, EN1
              or software (SW).

              The macros are defined on dt-bindings/mfd/max77620.h for different
              control source.
                - MAX77620_FPS_EVENT_SRC_EN0 for hardware input pin EN0.
                - MAX77620_FPS_EVENT_SRC_EN1 for hardware input pin EN1.
                - MAX77620_FPS_EVENT_SRC_SW for software control.

          maxim,shutdown-fps-time-period-us:
            description:
              FPS time period in microseconds when system enters in to shutdown state.

          maxim,suspend-fps-time-period-us:
            description:
              FPS time period in microseconds when system enters in to suspend state.

          maxim,device-state-on-disabled-event:
            $ref: /schemas/types.yaml#/definitions/uint32
            description: |
              Describe the PMIC state when FPS event cleared (set to LOW) whether it
              should go to sleep state or low-power state. Following are valid values:
                - MAX77620_FPS_INACTIVE_STATE_SLEEP to set the PMIC state to sleep.
                - MAX77620_FPS_INACTIVE_STATE_LOW_POWER to set the PMIC state to low
                  power.
              Absence of this property or other value will not change device state
              when FPS event get cleared.

          maxim,power-ok-control:
            $ref: /schemas/types.yaml#/definitions/uint32
            description: |
              Configure map power ok bit

              1: Enables POK(Power OK) to control nRST_IO and GPIO1 POK function.
              0: Disables POK control.

              If property missing, do not configure MPOK bit. If POK mapping is
              enabled for GPIO1/nRST_IO then, GPIO1/nRST_IO pins are HIGH only if
              all rails that have POK control enabled are HIGH. If any of the rails
              goes down (which are enabled for POK control) then, GPIO1/nRST_IO
              goes LOW.
            enum: [0, 1]

  pinmux:
    $ref: /schemas/pinctrl/maxim,max77620-pinctrl.yaml

  regulators:
    $ref: /schemas/regulator/maxim,max77620-regulator.yaml

allOf:
  - if:
      properties:
        compatible:
          contains:
            enum:
              - maxim,max20024
              - maxim,max77663
    then:
      properties:
        "#thermal-sensor-cells": false
        fps:
          patternProperties:
            "^fps[0-2]$":
              properties:
                maxim,shutdown-fps-time-period-us:
                  enum: [20, 40, 80, 160, 320, 640, 1280, 2540]
                maxim,suspend-fps-time-period-us:
                  enum: [20, 40, 80, 160, 320, 640, 1280, 2540]
                maxim,power-ok-control: false

  - if:
      properties:
        compatible:
          contains:
            const: maxim,max77620
    then:
      properties:
        fps:
          patternProperties:
            "^fps[0-2]$":
              properties:
                maxim,shutdown-fps-time-period-us:
                  enum: [40, 80, 160, 320, 640, 1280, 2560, 5120]
                maxim,suspend-fps-time-period-us:
                  enum: [40, 80, 160, 320, 640, 1280, 2560, 5120]

  - if:
      properties:
        compatible:
          not:
            contains:
              const: maxim,max77663
    then:
      properties:
        reg-names: false

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/irq.h>
    #include <dt-bindings/mfd/max77620.h>

    i2c {
        #address-cells = <1>;
        #size-cells = <0>;

        pmic@3c {
            compatible = "maxim,max77620";
            reg = <0x3c>;

            interrupt-parent = <&gpio>;
            interrupts = <86 IRQ_TYPE_LEVEL_HIGH>;

            interrupt-controller;
            #interrupt-cells = <2>;

            gpio-controller;
            #gpio-cells = <2>;

            #thermal-sensor-cells = <0>;

            system-power-controller;

            pinctrl-names = "default";
            pinctrl-0 = <&max77620_default>;

            max77620_default: pinmux {
                gpio0 {
                    pins = "gpio0";
                    function = "gpio";
                };

                gpio1 {
                    pins = "gpio1";
                    function = "fps-out";
                    maxim,active-fps-source = <MAX77620_FPS_SRC_0>;
                };

                gpio2 {
                    pins = "gpio2";
                    function = "fps-out";
                    maxim,active-fps-source = <MAX77620_FPS_SRC_1>;
                };

                gpio3 {
                    pins = "gpio3";
                    function = "gpio";
                };

                gpio4 {
                    pins = "gpio4";
                    function = "32k-out1";
                };

                gpio5-6 {
                    pins = "gpio5", "gpio6";
                    function = "gpio";
                    drive-push-pull = <1>;
                };

                gpio7 {
                    pins = "gpio7";
                    function = "gpio";
                };
            };

            fps {
                fps0 {
                    maxim,shutdown-fps-time-period-us = <1280>;
                    maxim,fps-event-source = <MAX77620_FPS_EVENT_SRC_EN0>;
                };

                fps1 {
                    maxim,shutdown-fps-time-period-us = <1280>;
                    maxim,fps-event-source = <MAX77620_FPS_EVENT_SRC_EN1>;
                };

                fps2 {
                    maxim,shutdown-fps-time-period-us = <1280>;
                    maxim,fps-event-source = <MAX77620_FPS_EVENT_SRC_SW>;
                };
            };

            regulators {
                in-sd0-supply = <&vdd_5v0_vbus>;
                in-sd1-supply = <&vdd_5v0_vbus>;
                in-sd2-supply = <&vdd_5v0_vbus>;
                in-sd3-supply = <&vdd_5v0_vbus>;

                in-ldo0-1-supply = <&vdd_1v8_vio>;
                in-ldo2-supply   = <&vdd_3v3_vbat>;
                in-ldo3-5-supply = <&vdd_3v3_vbat>;
                in-ldo4-6-supply = <&vdd_3v3_vbat>;
                in-ldo7-8-supply = <&vdd_1v8_vio>;

                sd0 {
                    regulator-name = "vdd_cpu";
                    regulator-min-microvolt = <800000>;
                    regulator-max-microvolt = <1250000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                sd1 {
                    regulator-name = "vdd_core";
                    regulator-min-microvolt = <950000>;
                    regulator-max-microvolt = <1350000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_1>;
                };

                vdd_1v8_vio: sd2 {
                    regulator-name = "vdd_1v8_gen";
                    regulator-min-microvolt = <1800000>;
                    regulator-max-microvolt = <1800000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                sd3 {
                    regulator-name = "vddio_ddr";
                    regulator-min-microvolt = <1200000>;
                    regulator-max-microvolt = <1200000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                ldo0 {
                    regulator-name = "avdd_pll";
                    regulator-min-microvolt = <1200000>;
                    regulator-max-microvolt = <1200000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_1>;
                };

                ldo1 {
                    regulator-name = "vdd_ddr_hs";
                    regulator-min-microvolt = <1000000>;
                    regulator-max-microvolt = <1000000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                ldo2 {
                    regulator-name = "avdd_usb";
                    regulator-min-microvolt = <3300000>;
                    regulator-max-microvolt = <3300000>;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                ldo3 {
                    regulator-name = "vdd_sdmmc3";
                    regulator-min-microvolt = <3000000>;
                    regulator-max-microvolt = <3000000>;
                    regulator-always-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                ldo4 {
                    regulator-name = "vdd_rtc";
                    regulator-min-microvolt = <1200000>;
                    regulator-max-microvolt = <1200000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_0>;
                };

                ldo5 {
                    regulator-name = "vdd_ddr_rx";
                    regulator-min-microvolt = <2850000>;
                    regulator-max-microvolt = <2850000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_0>;
                };

                ldo6 {
                    regulator-name = "avdd_osc";
                    regulator-min-microvolt = <1800000>;
                    regulator-max-microvolt = <1800000>;
                    regulator-always-on;
                    regulator-boot-on;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                ldo7 {
                    regulator-name = "vdd_1v2_mhl";
                    regulator-min-microvolt = <1050000>;
                    regulator-max-microvolt = <1250000>;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };

                ldo8 {
                    regulator-name = "avdd_dsi_csi";
                    regulator-min-microvolt = <1200000>;
                    regulator-max-microvolt = <1200000>;

                    maxim,active-fps-source = <MAX77620_FPS_SRC_NONE>;
                };
            };
        };
    };
...