UART modules can use DMA for offloading data transfers and reducing
interrupts, so enable this feature for Exynos542x boards. Tested on
Odroid XU3.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
arch/arm/boot/dts/exynos5420.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 906a1a4..99c9336 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -1406,21 +1406,29 @@
&serial_0 {
clocks = <&clock CLK_UART0>, <&clock CLK_SCLK_UART0>;
clock-names = "uart", "clk_uart_baud0";
+ dmas = <&pdma0 13>, <&pdma0 14>;
+ dma-names = "rx", "tx";
};
&serial_1 {
clocks = <&clock CLK_UART1>, <&clock CLK_SCLK_UART1>;
clock-names = "uart", "clk_uart_baud0";
+ dmas = <&pdma0 15>, <&pdma0 16>;
+ dma-names = "rx", "tx";
};
&serial_2 {
clocks = <&clock CLK_UART2>, <&clock CLK_SCLK_UART2>;
clock-names = "uart", "clk_uart_baud0";
+ dmas = <&pdma0 15>, <&pdma0 16>;
+ dma-names = "rx", "tx";
};
&serial_3 {
clocks = <&clock CLK_UART3>, <&clock CLK_SCLK_UART3>;
clock-names = "uart", "clk_uart_baud0";
+ dmas = <&pdma0 17>, <&pdma0 18>;
+ dma-names = "rx", "tx";
};
&sss {
--
1.9.1
--
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