[components/drivers/serial]add low level DMA TX config support.

misonyo · misonyo · commit f58e947da6c4 · 2019-05-13T15:57:04.000+08:00
diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
@@ -675,6 +675,8 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
             serial->serial_tx = tx_dma;
 
             dev->open_flag |= RT_DEVICE_FLAG_DMA_TX;
+            /* configure low level device */
+            serial->ops->control(serial, RT_DEVICE_CTRL_CONFIG, (void *)RT_DEVICE_FLAG_DMA_TX);
         }
 #endif /* RT_SERIAL_USING_DMA */
         else

Original file line number	Diff line number	Diff line change
`@@ -675,6 +675,8 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)`
`675`	`675`	`serial->serial_tx = tx_dma;`
`676`	`676`
`677`	`677`	`dev->open_flag \|= RT_DEVICE_FLAG_DMA_TX;`
	`678`	`+ /* configure low level device */`
	`679`	`+ serial->ops->control(serial, RT_DEVICE_CTRL_CONFIG, (void *)RT_DEVICE_FLAG_DMA_TX);`
`678`	`680`	`}`
`679`	`681`	`#endif /* RT_SERIAL_USING_DMA */`
`680`	`682`	`else`