tegrakernel/kernel/kernel-4.9/Documentation/devicetree/bindings/spi/mxs-spi.txt

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* Freescale MX233/MX28 SSP/SPI
Required properties:
- compatible: Should be "fsl,<soc>-spi", where soc is "imx23" or "imx28"
- reg: Offset and length of the register set for the device
- interrupts: Should contain SSP ERROR interrupt
- dmas: DMA specifier, consisting of a phandle to DMA controller node
and SSP DMA channel ID.
Refer to dma.txt and fsl-mxs-dma.txt for details.
- dma-names: Must be "rx-tx".
Optional properties:
- clock-frequency : Input clock frequency to the SPI block in Hz.
Default is 160000000 Hz.
Example:
ssp0: ssp@80010000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx28-spi";
reg = <0x80010000 0x2000>;
interrupts = <96>;
dmas = <&dma_apbh 0>;
dma-names = "rx-tx";
};