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Huang Shijiegregkh
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serial: imx: add DMA support for imx6q
We only enable the DMA support when the following are meet: [1] The uart port supports the hardware flow control(CTS/RTS). (Some uart port does not support the CTS/RTS.) [2] The application enables the CTS/RTS. [3] The Soc is imx6q. For the sdma's firmware limit, we do not support the DMA except the imx6q platform. [4] The uart is not used as a console. Signed-off-by: Huang Shijie <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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