From ef8d02d4a2c36f7a93e74c95a9c419353b310117 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Thu, 19 Jan 2017 01:46:58 +0100 Subject: [PATCH 1/2] ARM: dts: at91: Enable DMA on sama5d4_xplained console 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. Cc: stable #v4.1+ Acked-by: Nicolas Ferre Signed-off-by: Alexandre Belloni --- arch/arm/boot/dts/at91-sama5d4_xplained.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/at91-sama5d4_xplained.dts b/arch/arm/boot/dts/at91-sama5d4_xplained.dts index 91cf69e26aa1..5ab14cedb1db 100644 --- a/arch/arm/boot/dts/at91-sama5d4_xplained.dts +++ b/arch/arm/boot/dts/at91-sama5d4_xplained.dts @@ -116,6 +116,8 @@ slot@0 { }; usart3: serial@fc00c000 { + atmel,use-dma-rx; + atmel,use-dma-tx; status = "okay"; }; From 78162d48466d23c45a784034630c5928af631e3d Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Thu, 19 Jan 2017 23:05:39 +0100 Subject: [PATCH 2/2] ARM: dts: at91: Enable DMA on sama5d2_xplained console Enable DMA on uart1 to get a more reliable console. Cc: stable #v4.3+ Acked-by: Nicolas Ferre Signed-off-by: Alexandre Belloni --- arch/arm/boot/dts/at91-sama5d2_xplained.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts index e2d5cb3fecb1..9f7f8a7d8ff9 100644 --- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts +++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts @@ -148,6 +148,8 @@ pdmic@f8018000 { uart1: serial@f8020000 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_uart1_default>; + atmel,use-dma-rx; + atmel,use-dma-tx; status = "okay"; };