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With the generic DMA device tree helper supported by mxs-dma driver, client devices only need to call dma_request_slave_channel() for requesting a DMA channel from dmaengine. Since mxs is a DT only platform now, along with the changes, the non-DT case handling in probe function also gets removed. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
27 lines
734 B
Plaintext
27 lines
734 B
Plaintext
* Freescale MX233/MX28 SSP/SPI
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Required properties:
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- compatible: Should be "fsl,<soc>-spi", where soc is "imx23" or "imx28"
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- reg: Offset and length of the register set for the device
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- interrupts: Should contain SSP ERROR interrupt
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- dmas: DMA specifier, consisting of a phandle to DMA controller node
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and SSP DMA channel ID.
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Refer to dma.txt and fsl-mxs-dma.txt for details.
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- dma-names: Must be "rx-tx".
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Optional properties:
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- clock-frequency : Input clock frequency to the SPI block in Hz.
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Default is 160000000 Hz.
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Example:
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ssp0: ssp@80010000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,imx28-spi";
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reg = <0x80010000 0x2000>;
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interrupts = <96>;
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dmas = <&dma_apbh 0>;
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dma-names = "rx-tx";
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};
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