xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,gamma.yaml (revision 429508c84d95811dd1300181dfe84743caff9a38) 
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          - const: mediatek,mt8183-disp-gamma
39      - items:
40          - enum:
41              - mediatek,mt8188-disp-gamma
42          - const: mediatek,mt8195-disp-gamma
43
44  reg:
45    maxItems: 1
46
47  interrupts:
48    maxItems: 1
49
50  power-domains:
51    description: A phandle and PM domain specifier as defined by bindings of
52      the power controller specified by phandle. See
53      Documentation/devicetree/bindings/power/power-domain.yaml for details.
54
55  clocks:
56    items:
57      - description: GAMMA Clock
58
59  mediatek,gce-client-reg:
60    description: The register of client driver can be configured by gce with
61      4 arguments defined in this property, such as phandle of gce, subsys id,
62      register offset and size. Each GCE subsys id is mapping to a client
63      defined in the header include/dt-bindings/gce/<chip>-gce.h.
64    $ref: /schemas/types.yaml#/definitions/phandle-array
65    maxItems: 1
66
67required:
68  - compatible
69  - reg
70  - interrupts
71  - power-domains
72  - clocks
73
74additionalProperties: false
75
76examples:
77  - |
78    #include <dt-bindings/interrupt-controller/arm-gic.h>
79    #include <dt-bindings/clock/mt8173-clk.h>
80    #include <dt-bindings/power/mt8173-power.h>
81    #include <dt-bindings/gce/mt8173-gce.h>
82
83    soc {
84        #address-cells = <2>;
85        #size-cells = <2>;
86
87        gamma@14016000 {
88            compatible = "mediatek,mt8173-disp-gamma";
89            reg = <0 0x14016000 0 0x1000>;
90            interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_LOW>;
91            power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
92            clocks = <&mmsys CLK_MM_DISP_GAMMA>;
93            mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x6000 0x1000>;
94        };
95    };
96