From: Huang Shijie <b32955@freescale.com>
Date: Mon, 8 Jul 2013 09:14:18 +0000 (+0800)
Subject: serial: imx: add DMA support for imx6q
X-Git-Tag: v3.12-rc1~182^2~142
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4cdc8f61beb2a55c8c3d22dfcaf5f34a919fe9b;p=pandora-kernel.git

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 <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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