1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 84a054d7e986..b82595cf13e8 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -380,6 +380,21 @@ config SERIAL_ATMEL_CONSOLE
           console is the device which receives all kernel messages and
           warnings and which allows logins in single user mode).
 
+config SERIAL_ATMEL_PDC
+        bool "Support DMA transfers on AT91 / AT32 serial port"
+        depends on SERIAL_ATMEL
+        default y
+        help
+          Say Y here if you wish to use the PDC to do DMA transfers to
+          and from the Atmel AT91 / AT32 serial port. In order to
+          actually use DMA transfers, make sure that the use_dma_tx
+          and use_dma_rx members in the atmel_uart_data struct is set
+          appropriately for each port.
+
+          Note that break and error handling currently doesn't work
+          properly when DMA is enabled. Make sure that ports where
+          this matters don't use DMA.
+
 config SERIAL_ATMEL_TTYAT
         bool "Install as device ttyATn instead of ttySn"
         depends on SERIAL_ATMEL=y