kernel/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml

# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/gpu/arm,mali-bifrost.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ARM Mali Bifrost GPU

maintainers:
  - Rob Herring <robh@kernel.org>

properties:
  $nodename:
    pattern: '^gpu@[a-f0-9]+$'

  compatible:
    items:
      - enum:
          - amlogic,meson-g12a-mali
          - mediatek,mt8183-mali
          - realtek,rtd1619-mali
          - rockchip,px30-mali
          - rockchip,rk3568-mali
      - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable

  reg:
    maxItems: 1

  interrupts:
    items:
      - description: Job interrupt
      - description: MMU interrupt
      - description: GPU interrupt

  interrupt-names:
    items:
      - const: job
      - const: mmu
      - const: gpu

  clocks:
    maxItems: 1

  mali-supply: true

  sram-supply: true

  operating-points-v2: true

  power-domains:
    minItems: 1
    maxItems: 3

  resets:
    maxItems: 2

  "#cooling-cells":
    const: 2

  dynamic-power-coefficient:
    $ref: '/schemas/types.yaml#/definitions/uint32'
    description:
      A u32 value that represents the running time dynamic
      power coefficient in units of uW/MHz/V^2. The
      coefficient can either be calculated from power
      measurements or derived by analysis.

      The dynamic power consumption of the GPU is
      proportional to the square of the Voltage (V) and
      the clock frequency (f). The coefficient is used to
      calculate the dynamic power as below -

      Pdyn = dynamic-power-coefficient * V^2 * f

      where voltage is in V, frequency is in MHz.

  dma-coherent: true

required:
  - compatible
  - reg
  - interrupts
  - interrupt-names
  - clocks

additionalProperties: false

allOf:
  - if:
      properties:
        compatible:
          contains:
            const: amlogic,meson-g12a-mali
    then:
      required:
        - resets
  - if:
      properties:
        compatible:
          contains:
            const: mediatek,mt8183-mali
    then:
      properties:
        power-domains:
          minItems: 3
        power-domain-names:
          items:
            - const: core0
            - const: core1
            - const: core2

      required:
        - sram-supply
        - power-domains
        - power-domain-names
    else:
      properties:
        power-domains:
          maxItems: 1
        sram-supply: false

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

    gpu@ffe40000 {
      compatible = "amlogic,meson-g12a-mali", "arm,mali-bifrost";
      reg = <0xffe40000 0x10000>;
      interrupts = <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>,
             <GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>,
             <GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>;
      interrupt-names = "job", "mmu", "gpu";
      clocks = <&clk 1>;
      mali-supply = <&vdd_gpu>;
      operating-points-v2 = <&gpu_opp_table>;
      resets = <&reset 0>, <&reset 1>;
    };

    gpu_opp_table: opp-table {
      compatible = "operating-points-v2";

      opp-533000000 {
        opp-hz = /bits/ 64 <533000000>;
        opp-microvolt = <1250000>;
      };
      opp-450000000 {
        opp-hz = /bits/ 64 <450000000>;
        opp-microvolt = <1150000>;
      };
      opp-400000000 {
        opp-hz = /bits/ 64 <400000000>;
        opp-microvolt = <1125000>;
      };
      opp-350000000 {
        opp-hz = /bits/ 64 <350000000>;
        opp-microvolt = <1075000>;
      };
      opp-266000000 {
        opp-hz = /bits/ 64 <266000000>;
        opp-microvolt = <1025000>;
      };
      opp-160000000 {
        opp-hz = /bits/ 64 <160000000>;
        opp-microvolt = <925000>;
      };
      opp-100000000 {
        opp-hz = /bits/ 64 <100000000>;
        opp-microvolt = <912500>;
      };
    };

...