ARM: dts: ls1021a: Enable I2C DMA support

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

Signed-off-by: Esben Haabendal <eha@deif.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi
index f184905..f70025c 100644 (file)
--- a/arch/arm/boot/dts/ls1021a.dtsi
+++ b/arch/arm/boot/dts/ls1021a.dtsi
@@ -364,6 +364,8 @@
                        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";
                };
 
@@ -375,6 +377,8 @@
                        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";
                };
 
@@ -386,6 +390,8 @@
                        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";
                };