0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/display/mediatek/mediatek,gamma.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Mediatek display gamma correction
0008
0009 maintainers:
0010 - Chun-Kuang Hu <chunkuang.hu@kernel.org>
0011 - Philipp Zabel <p.zabel@pengutronix.de>
0012
0013 description: |
0014 Mediatek display gamma correction, namely GAMMA, provides a nonlinear
0015 operation used to adjust luminance in display system.
0016 GAMMA device node must be siblings to the central MMSYS_CONFIG node.
0017 For a description of the MMSYS_CONFIG binding, see
0018 Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
0019 for details.
0020
0021 properties:
0022 compatible:
0023 oneOf:
0024 - items:
0025 - const: mediatek,mt8173-disp-gamma
0026 - items:
0027 - const: mediatek,mt8183-disp-gamma
0028 - items:
0029 - enum:
0030 - mediatek,mt8186-disp-gamma
0031 - mediatek,mt8192-disp-gamma
0032 - mediatek,mt8195-disp-gamma
0033 - const: mediatek,mt8183-disp-gamma
0034
0035 reg:
0036 maxItems: 1
0037
0038 interrupts:
0039 maxItems: 1
0040
0041 power-domains:
0042 description: A phandle and PM domain specifier as defined by bindings of
0043 the power controller specified by phandle. See
0044 Documentation/devicetree/bindings/power/power-domain.yaml for details.
0045
0046 clocks:
0047 items:
0048 - description: GAMMA Clock
0049
0050 mediatek,gce-client-reg:
0051 description: The register of client driver can be configured by gce with
0052 4 arguments defined in this property, such as phandle of gce, subsys id,
0053 register offset and size. Each GCE subsys id is mapping to a client
0054 defined in the header include/dt-bindings/gce/<chip>-gce.h.
0055 $ref: /schemas/types.yaml#/definitions/phandle-array
0056 maxItems: 1
0057
0058 required:
0059 - compatible
0060 - reg
0061 - interrupts
0062 - power-domains
0063 - clocks
0064
0065 additionalProperties: false
0066
0067 examples:
0068 - |
0069 #include <dt-bindings/interrupt-controller/arm-gic.h>
0070 #include <dt-bindings/clock/mt8173-clk.h>
0071 #include <dt-bindings/power/mt8173-power.h>
0072 #include <dt-bindings/gce/mt8173-gce.h>
0073
0074 soc {
0075 #address-cells = <2>;
0076 #size-cells = <2>;
0077
0078 gamma@14016000 {
0079 compatible = "mediatek,mt8173-disp-gamma";
0080 reg = <0 0x14016000 0 0x1000>;
0081 interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_LOW>;
0082 power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
0083 clocks = <&mmsys CLK_MM_DISP_GAMMA>;
0084 mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x6000 0x1000>;
0085 };
0086 };
