Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/display/mediatek/mediatek,gamma.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Mediatek display gamma correction
   8
   9 maintainers:
  10   - Chun-Kuang Hu <chunkuang.hu@kernel.org>
  11   - Philipp Zabel <p.zabel@pengutronix.de>
  12
  13 description: |
  14   Mediatek display gamma correction, namely GAMMA, provides a nonlinear
  15   operation used to adjust luminance in display system.
  16   GAMMA device node must be siblings to the central MMSYS_CONFIG node.
  17   For a description of the MMSYS_CONFIG binding, see
  18   Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
  19   for details.
  20
  21 properties:
  22   compatible:
  23     oneOf:
  24       - items:
  25           - const: mediatek,mt8173-disp-gamma
  26       - items:
  27           - const: mediatek,mt8183-disp-gamma
  28       - items:
  29           - enum:
  30               - mediatek,mt8192-disp-gamma
  31               - mediatek,mt8195-disp-gamma
  32           - enum:
  33               - mediatek,mt8183-disp-gamma
  34
  35   reg:
  36     maxItems: 1
  37
  38   interrupts:
  39     maxItems: 1
  40
  41   power-domains:
  42     description: A phandle and PM domain specifier as defined by bindings of
  43       the power controller specified by phandle. See
  44       Documentation/devicetree/bindings/power/power-domain.yaml for details.
  45
  46   clocks:
  47     items:
  48       - description: GAMMA Clock
  49
  50   mediatek,gce-client-reg:
  51     description: The register of client driver can be configured by gce with
  52       4 arguments defined in this property, such as phandle of gce, subsys id,
  53       register offset and size. Each GCE subsys id is mapping to a client
  54       defined in the header include/dt-bindings/gce/<chip>-gce.h.
  55     $ref: /schemas/types.yaml#/definitions/phandle-array
  56     maxItems: 1
  57
  58 required:
  59   - compatible
  60   - reg
  61   - interrupts
  62   - power-domains
  63   - clocks
  64
  65 additionalProperties: false
  66
  67 examples:
  68   - |
  69     #include <dt-bindings/interrupt-controller/arm-gic.h>
  70     #include <dt-bindings/clock/mt8173-clk.h>
  71     #include <dt-bindings/power/mt8173-power.h>
  72     #include <dt-bindings/gce/mt8173-gce.h>
  73
  74     soc {
  75         #address-cells = <2>;
  76         #size-cells = <2>;
  77
  78         gamma@14016000 {
  79             compatible = "mediatek,mt8173-disp-gamma";
  80             reg = <0 0x14016000 0 0x1000>;
  81             interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_LOW>;
  82             power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
  83             clocks = <&mmsys CLK_MM_DISP_GAMMA>;
  84             mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x6000 0x1000>;
  85         };
  86     };