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Diffstat (limited to 'Documentation/devicetree/bindings/display/mediatek/mediatek,wdma.yaml')
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1 files changed, 89 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,wdma.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,wdma.yaml new file mode 100644 index 0000000000..a3a2b71a45 --- /dev/null +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,wdma.yaml @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/mediatek/mediatek,wdma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Mediatek Write Direct Memory Access + +maintainers: + - Chun-Kuang Hu <chunkuang.hu@kernel.org> + - Philipp Zabel <p.zabel@pengutronix.de> + +description: | + Mediatek Write Direct Memory Access(WDMA) component used to write + the data into DMA. + WDMA device node must be siblings to the central MMSYS_CONFIG node. + For a description of the MMSYS_CONFIG binding, see + Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml + for details. + +properties: + compatible: + oneOf: + - enum: + - mediatek,mt8173-disp-wdma + - items: + - const: mediatek,mt6795-disp-wdma + - const: mediatek,mt8173-disp-wdma + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + power-domains: + description: A phandle and PM domain specifier as defined by bindings of + the power controller specified by phandle. See + Documentation/devicetree/bindings/power/power-domain.yaml for details. + + clocks: + items: + - description: WDMA Clock + + iommus: + description: + This property should point to the respective IOMMU block with master port as argument, + see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details. + + mediatek,gce-client-reg: + description: The register of client driver can be configured by gce with + 4 arguments defined in this property, such as phandle of gce, subsys id, + register offset and size. Each GCE subsys id is mapping to a client + defined in the header include/dt-bindings/gce/<chip>-gce.h. + $ref: /schemas/types.yaml#/definitions/phandle-array + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - power-domains + - clocks + - iommus + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/mt8173-clk.h> + #include <dt-bindings/power/mt8173-power.h> + #include <dt-bindings/gce/mt8173-gce.h> + #include <dt-bindings/memory/mt8173-larb-port.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + wdma0: wdma@14011000 { + compatible = "mediatek,mt8173-disp-wdma"; + reg = <0 0x14011000 0 0x1000>; + interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_LOW>; + power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>; + clocks = <&mmsys CLK_MM_DISP_WDMA0>; + iommus = <&iommu M4U_PORT_DISP_WDMA0>; + mediatek,gce-client-reg = <&gce SUBSYS_1401XXXX 0x1000 0x1000>; + }; + }; |