Merge branch 'r6040' of git://git.kernel.org/pub/scm/linux/kernel/git/romieu/netdev...

[mv-sheeva.git] / drivers / serial / Kconfig

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 84a054d7e9865aec10da1601a7e3f4deba7635c7..b82595cf13e86ff759c92109fb096f706e68e7e5 100644 (file)
--- 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