xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/soc/mediatek/mtk-svs.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/soc/mediatek/mtk-svs.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: MediaTek Smart Voltage Scaling (SVS)

maintainers:
  - Roger Lu <roger.lu@mediatek.com>
  - Matthias Brugger <matthias.bgg@gmail.com>
  - Kevin Hilman <khilman@kernel.org>

description: |+
  The SVS engine is a piece of hardware which has several
  controllers(banks) for calculating suitable voltage to
  different power domains(CPU/GPU/CCI) according to
  chip process corner, temperatures and other factors. Then DVFS
  driver could apply SVS bank voltage to PMIC/Buck.

properties:
  compatible:
    enum:
      - mediatek,mt8183-svs
      - mediatek,mt8192-svs

  reg:
    maxItems: 1
    description: Address range of the MTK SVS controller.

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 1
    description: Main clock for MTK SVS controller to work.

  clock-names:
    const: main

  nvmem-cells:
    minItems: 1
    description:
      Phandle to the calibration data provided by a nvmem device.
    items:
      - description: SVS efuse for SVS controller
      - description: Thermal efuse for SVS controller

  nvmem-cell-names:
    items:
      - const: svs-calibration-data
      - const: t-calibration-data

  resets:
    maxItems: 1

  reset-names:
    items:
      - const: svs_rst

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - nvmem-cells
  - nvmem-cell-names

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/mt8183-clk.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>

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

        svs@1100b000 {
            compatible = "mediatek,mt8183-svs";
            reg = <0 0x1100b000 0 0x1000>;
            interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>;
            clocks = <&infracfg CLK_INFRA_THERM>;
            clock-names = "main";
            nvmem-cells = <&svs_calibration>, <&thermal_calibration>;
            nvmem-cell-names = "svs-calibration-data", "t-calibration-data";
        };
    };