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Diffstat (limited to 'Documentation/devicetree/bindings/dma/apple,admac.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/dma/apple,admac.yaml | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/apple,admac.yaml b/Documentation/devicetree/bindings/dma/apple,admac.yaml new file mode 100644 index 0000000000..ab193bc8bd --- /dev/null +++ b/Documentation/devicetree/bindings/dma/apple,admac.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/apple,admac.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple Audio DMA Controller (ADMAC) + +description: | + Apple's Audio DMA Controller (ADMAC) is used to fetch and store audio samples + on SoCs from the "Apple Silicon" family. + + The controller has been seen with up to 24 channels. Even-numbered channels + are TX-only, odd-numbered are RX-only. Individual channels are coupled to + fixed device endpoints. + +maintainers: + - Martin PoviĊĦer <povik+lin@cutebit.org> + +allOf: + - $ref: dma-controller.yaml# + +properties: + compatible: + items: + - enum: + - apple,t6000-admac + - apple,t8103-admac + - apple,t8112-admac + - const: apple,admac + + reg: + maxItems: 1 + + '#dma-cells': + const: 1 + description: + Clients specify a single cell with channel number. + + dma-channels: + maximum: 24 + + interrupts: + minItems: 4 + maxItems: 4 + description: + Interrupts that correspond to the 4 IRQ outputs of the controller. Usually + only one of the controller outputs will be connected as an usable interrupt + source. The remaining interrupts will be left without a valid value, e.g. + in an interrupts-extended list the disconnected positions will contain + an empty phandle reference <0>. + + iommus: + minItems: 1 + maxItems: 2 + + power-domains: + maxItems: 1 + + resets: + maxItems: 1 + +required: + - compatible + - reg + - '#dma-cells' + - dma-channels + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/apple-aic.h> + #include <dt-bindings/interrupt-controller/irq.h> + + aic: interrupt-controller { + interrupt-controller; + #interrupt-cells = <3>; + }; + + admac: dma-controller@238200000 { + compatible = "apple,t8103-admac", "apple,admac"; + reg = <0x38200000 0x34000>; + dma-channels = <24>; + interrupts-extended = <0>, + <&aic AIC_IRQ 626 IRQ_TYPE_LEVEL_HIGH>, + <0>, + <0>; + #dma-cells = <1>; + }; |