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ARM: dts: exynos: Enable DMA support for UART modules on Exynos542x SoCs

Message ID 1481891254-7992-1-git-send-email-m.szyprowski@samsung.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Marek Szyprowski Dec. 16, 2016, 12:27 p.m. UTC 
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@samsung.com>
---
 arch/arm/boot/dts/exynos5420.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

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 {