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
7 title: Mediatek display gamma correction
8
9 maintainers:
10 - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11 - Philipp Zabel <p.zabel@pengutronix.de>
12
13 description: |
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
21 properties:
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
68 required:
69 - compatible
70 - reg
71 - interrupts
72 - power-domains
73 - clocks
74
75 additionalProperties: false
76
77 examples:
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 };
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