linux-kernel - [PATCH v2 4/4] arm: dts: ls1021a: Enable I2C DMA support

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Message-Id: <20180709094304.8814-5-esben.haabendal@gmail.com>
Date:   Mon,  9 Jul 2018 11:43:04 +0200
From:   Esben Haabendal <esben.haabendal@...il.com>
To:     linux-i2c@...r.kernel.org
Cc:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Yuan Yao <yao.yuan@...escale.com>,
        Esben Haabendal <eha@...f.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/4] arm: dts: ls1021a: Enable I2C DMA support

From: Esben Haabendal <eha@...f.com>

Gives substantial performance improvement for transfers larger than 16
bytes (DMA_THRESHOLD).  Smaller transfers are unaffected.

Signed-off-by: Esben Haabendal <eha@...f.com>
---
 arch/arm/boot/dts/ls1021a.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi
index c55d479971cc..1e5640701c65 100644
--- a/arch/arm/boot/dts/ls1021a.dtsi
+++ b/arch/arm/boot/dts/ls1021a.dtsi
@@ -363,6 +363,8 @@
 			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
 			clock-names = "i2c";
 			clocks = <&clockgen 4 1>;
+			dma-names = "tx", "rx";
+			dmas = <&edma0 1 39>, <&edma0 1 38>;
 			status = "disabled";
 		};
 
@@ -374,6 +376,8 @@
 			interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
 			clock-names = "i2c";
 			clocks = <&clockgen 4 1>;
+			dma-names = "tx", "rx";
+			dmas = <&edma0 1 37>, <&edma0 1 36>;
 			status = "disabled";
 		};
 
@@ -385,6 +389,8 @@
 			interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>;
 			clock-names = "i2c";
 			clocks = <&clockgen 4 1>;
+			dma-names = "tx", "rx";
+			dmas = <&edma0 1 35>, <&edma0 1 34>;
 			status = "disabled";
 		};
 
-- 
2.18.0