xref: /linux/Documentation/devicetree/bindings/display/mediatek/mediatek,wdma.yaml (revision c16c8bfa09d5f318c1bd65698d058d3739970c24) 
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
7title: Mediatek Write Direct Memory Access
8
9maintainers:
10  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
11  - Philipp Zabel <p.zabel@pengutronix.de>
12
13description: |
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
21properties:
22  compatible:
23    oneOf:
24      - items:
25          - const: mediatek,mt8173-disp-wdma
26
27  reg:
28    maxItems: 1
29
30  interrupts:
31    maxItems: 1
32
33  power-domains:
34    description: A phandle and PM domain specifier as defined by bindings of
35      the power controller specified by phandle. See
36      Documentation/devicetree/bindings/power/power-domain.yaml for details.
37
38  clocks:
39    items:
40      - description: WDMA Clock
41
42  iommus:
43    description:
44      This property should point to the respective IOMMU block with master port as argument,
45      see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.
46
47  mediatek,gce-client-reg:
48    description: The register of client driver can be configured by gce with
49      4 arguments defined in this property, such as phandle of gce, subsys id,
50      register offset and size. Each GCE subsys id is mapping to a client
51      defined in the header include/dt-bindings/gce/<chip>-gce.h.
52    $ref: /schemas/types.yaml#/definitions/phandle-array
53    maxItems: 1
54
55required:
56  - compatible
57  - reg
58  - interrupts
59  - power-domains
60  - clocks
61  - iommus
62
63additionalProperties: false
64
65examples:
66  - |
67    #include <dt-bindings/interrupt-controller/arm-gic.h>
68    #include <dt-bindings/clock/mt8173-clk.h>
69    #include <dt-bindings/power/mt8173-power.h>
70    #include <dt-bindings/gce/mt8173-gce.h>
71    #include <dt-bindings/memory/mt8173-larb-port.h>
72
73    soc {
74        #address-cells = <2>;
75        #size-cells = <2>;
76
77        wdma0: wdma@14011000 {
78            compatible = "mediatek,mt8173-disp-wdma";
79            reg = <0 0x14011000 0 0x1000>;
80            interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_LOW>;
81            power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
82            clocks = <&mmsys CLK_MM_DISP_WDMA0>;
83            iommus = <&iommu M4U_PORT_DISP_WDMA0>;
84            mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x1000 0x1000>;
85        };
86    };
87