于 2013年07月08日 17:14, Huang Shijie 写道: > (1) This patch set adds the DMA support for the imx serial driver. > The uart with the dma support is usually used by the Bluetooth. > > For the firmware's limit, i only enable the DMA for imx6 serials. > If we have proper firmware for imx53 (or other chips), we can also > enable the DMA for it. > > (2) 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 imx6 serials. > For the sdma's firmware limit, we do not support the DMA except > the imx6 platform. > > [4] The uart is not used as a console. > > > (3) Tested this patch set by: > connecting a imx6q-arm2 board(DTE) with a imx53 board(DCE). > > v3 --> v4: > [0] add DTE pad for uart2 > > v2 --> v3: > [0] add a new patch to fix the RTS/CTS pad name issue. > [1] rename the uart DTE pinctrl, remove the "dte" from the pinctrl. > [2] add a similar UART DTE pinctrl for IMX6DL. > [3] move the "fsl,imx6q-uart" to the first of the compatible table. > > v1 --> v2: > [0] use the "fsl,imx6q-uart" as the new compatible value. > [1] move dma_is_inited to imx_uart_dma_init(); > move dma_is_enabled to imx_enable_dma(); > [2] move imx_disable_dma() to the front place of the imx_shutdown(), > just before calls the imx_uart_dma_exit(). > [3] misc > > > Huang Shijie (6): > serial: imx: distinguish the imx6q uart from the others > serial: imx: add DMA support for imx6q Hi Greg: Could you merge the two patches as above? thanks Huang Shijie -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
