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Freescale Enhanced Serial Audio Interface (ESAI) Controller | ||
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The Enhanced Serial Audio Interface (ESAI) provides a full-duplex serial port | ||
for serial communication with a variety of serial devices, including industry | ||
standard codecs, Sony/Phillips Digital Interface (S/PDIF) transceivers, and | ||
other DSPs. It has up to six transmitters and four receivers. | ||
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Required properties: | ||
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- compatible : Compatible list, must contain "fsl,imx35-esai". | ||
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- reg : Offset and length of the register set for the device. | ||
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- interrupts : Contains the spdif interrupt. | ||
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- dmas : Generic dma devicetree binding as described in | ||
Documentation/devicetree/bindings/dma/dma.txt. | ||
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- dma-names : Two dmas have to be defined, "tx" and "rx". | ||
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- clocks: Contains an entry for each entry in clock-names. | ||
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- clock-names : Includes the following entries: | ||
"core" The core clock used to access registers | ||
"extal" The esai baud clock for esai controller used to derive | ||
HCK, SCK and FS. | ||
"fsys" The system clock derived from ahb clock used to derive | ||
HCK, SCK and FS. | ||
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- fsl,fifo-depth: The number of elements in the transmit and receive FIFOs. | ||
This number is the maximum allowed value for TFCR[TFWM] or RFCR[RFWM]. | ||
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- fsl,esai-synchronous: This is a boolean property. If present, indicating | ||
that ESAI would work in the synchronous mode, which means all the settings | ||
for Receiving would be duplicated from Transmition related registers. | ||
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Example: | ||
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esai: esai@02024000 { | ||
compatible = "fsl,imx35-esai"; | ||
reg = <0x02024000 0x4000>; | ||
interrupts = <0 51 0x04>; | ||
clocks = <&clks 208>, <&clks 118>, <&clks 208>; | ||
clock-names = "core", "extal", "fsys"; | ||
dmas = <&sdma 23 21 0>, <&sdma 24 21 0>; | ||
dma-names = "rx", "tx"; | ||
fsl,fifo-depth = <128>; | ||
fsl,esai-synchronous; | ||
status = "disabled"; | ||
}; |
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