Open Menu / Documentation / devicetree / bindings / mfd / apple,smc.yaml 
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/apple,smc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Apple Mac System Management Controller

maintainers:
  - Sven Peter <sven@kernel.org>

description:
  Apple Mac System Management Controller implements various functions
  such as GPIO, RTC, power, reboot.

properties:
  compatible:
    oneOf:
      - items:
          - const: apple,t6020-smc
          - const: apple,t8103-smc
      - items:
          - enum:
              # Do not add additional SoC to this list.
              - apple,t6000-smc
              - apple,t8103-smc
              - apple,t8112-smc
          - const: apple,smc

  reg:
    items:
      - description: SMC area
      - description: SRAM area

  reg-names:
    items:
      - const: smc
      - const: sram

  mboxes:
    maxItems: 1

  gpio:
    $ref: /schemas/gpio/apple,smc-gpio.yaml

  reboot:
    $ref: /schemas/power/reset/apple,smc-reboot.yaml

  rtc:
    $ref: /schemas/rtc/apple,smc-rtc.yaml

  hwmon:
    $ref: /schemas/hwmon/apple,smc-hwmon.yaml

additionalProperties: false

required:
  - compatible
  - reg
  - reg-names
  - mboxes

examples:
  - |
    soc {
      #address-cells = <2>;
      #size-cells = <2>;

      smc@23e400000 {
        compatible = "apple,t8103-smc", "apple,smc";
        reg = <0x2 0x3e400000 0x0 0x4000>,
               <0x2 0x3fe00000 0x0 0x100000>;
        reg-names = "smc", "sram";
        mboxes = <&smc_mbox>;

        smc_gpio: gpio {
          compatible = "apple,smc-gpio";
          gpio-controller;
          #gpio-cells = <2>;
        };

        reboot {
          compatible = "apple,smc-reboot";
          nvmem-cells = <&shutdown_flag>, <&boot_stage>,
                        <&boot_error_count>, <&panic_count>;
          nvmem-cell-names = "shutdown_flag", "boot_stage",
                             "boot_error_count", "panic_count";
        };

        rtc {
          compatible = "apple,smc-rtc";
          nvmem-cells = <&rtc_offset>;
          nvmem-cell-names = "rtc_offset";
       };

        hwmon {
          compatible = "apple,smc-hwmon";

          current-ID0R {
            apple,key-id = "ID0R";
            label = "AC Input Current";
          };

          fan-F0Ac {
            apple,key-id = "F0Ac";
            apple,fan-minimum = "F0Mn";
            apple,fan-maximum = "F0Mx";
            apple,fan-target = "F0Tg";
            apple,fan-mode = "F0Md";
            label = "Fan 1";
          };

          power-PSTR {
            apple,key-id = "PSTR";
            label = "Total System Power";
          };

          temperature-TW0P {
            apple,key-id = "TW0P";
            label = "WiFi/BT Module Temperature";
          };

          voltage-VD0R {
            apple,key-id = "VD0R";
            label = "AC Input Voltage";
          };
        };
      };
    };