[PATCH 4/4] arm: dts: ls1021a: Enable I2C DMA support
From: Esben Haabendal
Date: Wed May 23 2018 - 05:03:17 EST
From: Esben Haabendal <eha@xxxxxxxx>
Gives substantial performance improvement for transfers larger than 16
bytes (DMA_THRESHOLD). Smaller transfers are unaffected.
Signed-off-by: Esben Haabendal <eha@xxxxxxxx>
---
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";
};
--
2.17.0