xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml (revision ee057c8c194b9283f4137b253b70e292693a39f0) 
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      - enum:
25          - mediatek,mt8173-disp-gamma
26          - mediatek,mt8183-disp-gamma
27          - mediatek,mt8195-disp-gamma
28      - items:
29          - enum:
30              - mediatek,mt6795-disp-gamma
31          - const: mediatek,mt8173-disp-gamma
32      - items:
33          - enum:
34              - mediatek,mt8186-disp-gamma
35              - mediatek,mt8188-disp-gamma
36              - mediatek,mt8192-disp-gamma
37              - mediatek,mt8195-disp-gamma
38              - mediatek,mt8365-disp-gamma
39          - const: mediatek,mt8183-disp-gamma
40      - items:
41          - enum:
42              - mediatek,mt8188-disp-gamma
43          - const: mediatek,mt8195-disp-gamma
44
45  reg:
46    maxItems: 1
47
48  interrupts:
49    maxItems: 1
50
51  power-domains:
52    description: A phandle and PM domain specifier as defined by bindings of
53      the power controller specified by phandle. See
54      Documentation/devicetree/bindings/power/power-domain.yaml for details.
55
56  clocks:
57    items:
58      - description: GAMMA Clock
59
60  mediatek,gce-client-reg:
61    description: The register of client driver can be configured by gce with
62      4 arguments defined in this property, such as phandle of gce, subsys id,
63      register offset and size. Each GCE subsys id is mapping to a client
64      defined in the header include/dt-bindings/gce/<chip>-gce.h.
65    $ref: /schemas/types.yaml#/definitions/phandle-array
66    maxItems: 1
67
68required:
69  - compatible
70  - reg
71  - interrupts
72  - power-domains
73  - clocks
74
75additionalProperties: false
76
77examples:
78  - |
79    #include <dt-bindings/interrupt-controller/arm-gic.h>
80    #include <dt-bindings/clock/mt8173-clk.h>
81    #include <dt-bindings/power/mt8173-power.h>
82    #include <dt-bindings/gce/mt8173-gce.h>
83
84    soc {
85        #address-cells = <2>;
86        #size-cells = <2>;
87
88        gamma@14016000 {
89            compatible = "mediatek,mt8173-disp-gamma";
90            reg = <0 0x14016000 0 0x1000>;
91            interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_LOW>;
92            power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
93            clocks = <&mmsys CLK_MM_DISP_GAMMA>;
94            mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x6000 0x1000>;
95        };
96    };
97