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-rw-r--r--drivers/serial/Kconfig15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 84a054d7e98..b82595cf13e 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