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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. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
34 lines
887 B
Plaintext
34 lines
887 B
Plaintext
* Freescale MXS Application UART (AUART)
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Required properties:
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- compatible : Should be "fsl,<soc>-auart". The supported SoCs include
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imx23 and imx28.
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- reg : Address and length of the register set for the device
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- interrupts : Should contain the auart interrupt numbers
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- dmas: DMA specifier, consisting of a phandle to DMA controller node
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and AUART DMA channel ID.
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Refer to dma.txt and fsl-mxs-dma.txt for details.
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- dma-names: "rx" for RX channel, "tx" for TX channel.
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Example:
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auart0: serial@8006a000 {
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compatible = "fsl,imx28-auart", "fsl,imx23-auart";
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reg = <0x8006a000 0x2000>;
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interrupts = <112>;
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dmas = <&dma_apbx 8>, <&dma_apbx 9>;
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dma-names = "rx", "tx";
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};
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Note: Each auart port should have an alias correctly numbered in "aliases"
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node.
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Example:
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aliases {
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serial0 = &auart0;
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serial1 = &auart1;
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serial2 = &auart2;
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serial3 = &auart3;
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serial4 = &auart4;
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};
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