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
7title: Mediatek display gamma correction
8
9maintainers:
10  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11  - Philipp Zabel <p.zabel@pengutronix.de>
12
13description: |
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
21properties:
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,mt8186-disp-gamma
31              - mediatek,mt8188-disp-gamma
32              - mediatek,mt8192-disp-gamma
33              - mediatek,mt8195-disp-gamma
34          - const: mediatek,mt8183-disp-gamma
35
36  reg:
37    maxItems: 1
38
39  interrupts:
40    maxItems: 1
41
42  power-domains:
43    description: A phandle and PM domain specifier as defined by bindings of
44      the power controller specified by phandle. See
45      Documentation/devicetree/bindings/power/power-domain.yaml for details.
46
47  clocks:
48    items:
49      - description: GAMMA Clock
50
51  mediatek,gce-client-reg:
52    description: The register of client driver can be configured by gce with
53      4 arguments defined in this property, such as phandle of gce, subsys id,
54      register offset and size. Each GCE subsys id is mapping to a client
55      defined in the header include/dt-bindings/gce/<chip>-gce.h.
56    $ref: /schemas/types.yaml#/definitions/phandle-array
57    maxItems: 1
58
59required:
60  - compatible
61  - reg
62  - interrupts
63  - power-domains
64  - clocks
65
66additionalProperties: false
67
68examples:
69  - |
70    #include <dt-bindings/interrupt-controller/arm-gic.h>
71    #include <dt-bindings/clock/mt8173-clk.h>
72    #include <dt-bindings/power/mt8173-power.h>
73    #include <dt-bindings/gce/mt8173-gce.h>
74
75    soc {
76        #address-cells = <2>;
77        #size-cells = <2>;
78
79        gamma@14016000 {
80            compatible = "mediatek,mt8173-disp-gamma";
81            reg = <0 0x14016000 0 0x1000>;
82            interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_LOW>;
83            power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
84            clocks = <&mmsys CLK_MM_DISP_GAMMA>;
85            mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x6000 0x1000>;
86        };
87    };
88