This is a note to let you know that I've just added the patch titled
ARM: dts: at91: Enable DMA on sama5d4_xplained console
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-at91-enable-dma-on-sama5d4_xplained-console.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ef8d02d4a2c36f7a93e74c95a9c419353b310117 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Date: Thu, 19 Jan 2017 01:46:58 +0100
Subject: ARM: dts: at91: Enable DMA on sama5d4_xplained console
From: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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";
};
Patches currently in stable-queue which might be from alexandre.belloni@xxxxxxxxxxxxxxxxxx are
queue-4.9/arm-dts-at91-enable-dma-on-sama5d4_xplained-console.patch
queue-4.9/arm-at91-define-lpddr-types.patch
queue-4.9/arm-dts-at91-enable-dma-on-sama5d2_xplained-console.patch