xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml (revision cbdb1f163af2bb90d01be1f0263df1d8d5c9d9d3) 
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,mt8192-disp-gamma
32              - mediatek,mt8195-disp-gamma
33          - const: 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
58required:
59  - compatible
60  - reg
61  - interrupts
62  - power-domains
63  - clocks
64
65additionalProperties: false
66
67examples:
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    };
87