linux-kernel - [PATCH v2 14/14] ARM: dts: at91: at91sam9x5ek: use DMA for USART0

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Date:   Tue, 10 Oct 2017 13:09:49 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...e-electrons.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <linux@...linux.org.uk>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v2 14/14] ARM: dts: at91: at91sam9x5ek: use DMA for USART0

From: Nicolas Ferre <nicolas.ferre@...rochip.com>

Use DMA for USART0 (which is used as ttyS1) as we have enough channels and to
show how to specify DMA use with serial nodes.

Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 arch/arm/boot/dts/at91sam9x5ek.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/at91sam9x5ek.dtsi b/arch/arm/boot/dts/at91sam9x5ek.dtsi
index 9d2bbc41a7b0..a85eb51e6aa8 100644
--- a/arch/arm/boot/dts/at91sam9x5ek.dtsi
+++ b/arch/arm/boot/dts/at91sam9x5ek.dtsi
@@ -50,6 +50,8 @@
 			};
 
 			usart0: serial@...1c000 {
+				atmel,use-dma-rx;
+				atmel,use-dma-tx;
 				status = "okay";
 			};
 
-- 
2.7.4