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,wdma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Mediatek Write Direct Memory Access
8
9 maintainers:
10 - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11 - Philipp Zabel <p.zabel@pengutronix.de>
12
13 description: |
14 Mediatek Write Direct Memory Access(WDMA) component used to write
15 the data into DMA.
16 WDMA 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-wdma
26 - items:
27 - const: mediatek,mt6795-disp-wdma
28 - const: mediatek,mt8173-disp-wdma
29
30 reg:
31 maxItems: 1
32
33 interrupts:
34 maxItems: 1
35
36 power-domains:
37 description: A phandle and PM domain specifier as defined by bindings of
38 the power controller specified by phandle. See
39 Documentation/devicetree/bindings/power/power-domain.yaml for details.
40
41 clocks:
42 items:
43 - description: WDMA Clock
44
45 iommus:
46 description:
47 This property should point to the respective IOMMU block with master port as argument,
48 see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
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
58 required:
59 - compatible
60 - reg
61 - interrupts
62 - power-domains
63 - clocks
64 - iommus
65
66 additionalProperties: false
67
68 examples:
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 #include <dt-bindings/memory/mt8173-larb-port.h>
75
76 soc {
77 #address-cells = <2>;
78 #size-cells = <2>;
79
80 wdma0: wdma@14011000 {
81 compatible = "mediatek,mt8173-disp-wdma";
82 reg = <0 0x14011000 0 0x1000>;
83 interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_LOW>;
84 power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
85 clocks = <&mmsys CLK_MM_DISP_WDMA0>;
86 iommus = <&iommu M4U_PORT_DISP_WDMA0>;
87 mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x1000 0x1000>;
88 };
89 };
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