ARM: dts: at91: Enable DMA on sama5d4_xplained console

BugLink: http://bugs.launchpad.net/bugs/1672544
commit ef8d02d4a2c36f7a93e74c95a9c419353b310117 upstream.

Enable DMA on usart3 to get a more reliable console. This is especially
useful for automation and kernelci were a kernel with PROVE_LOCKING enabled
is quite susceptible to character loss, resulting in tests failure.

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/arch/arm/boot/dts/at91-sama5d4_xplained.dts b/arch/arm/boot/dts/at91-sama5d4_xplained.dts
index ed7fce2977387998012466362a67339722e97d29..44d1171c7fc04fa6669bc1a4bbad756692ec03aa 100644 (file)
--- a/arch/arm/boot/dts/at91-sama5d4_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d4_xplained.dts
@@ -110,6 +110,8 @@
                        };
 
                        usart3: serial@fc00c000 {
+                               atmel,use-dma-rx;
+                               atmel,use-dma-tx;
                                status = "okay";
                        };