[PATCH 4.9 022/153] ARM: dts: at91: Enable DMA on sama5d4_xplained console

Greg Kroah-Hartman
2017-03-10T09:18:06Z

From: Alexandre Belloni <alexandre.belloni@free-electrons.com>

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>

---
arch/arm/boot/dts/at91-sama5d4_xplained.dts | 2 ++
1 file changed, 2 insertions(+)

--- 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";
};