[PATCH] ARM: dts: rockchip: Add DMA tx and rx channels in UART interfaces for RK3288 SoCs

This enable DMA capability for the corresponding UART interfaces, also it removes
warning "ttyS%d - Failed to request dma" from kernel logs.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
---

Changes since v1 ("[PATCH] ARM: dts: rockchip: Add dmac_bus rx and tx for uart2"):
        - Add DMA tx and rx channels for all UART interfaces
        - Rename commit summary

 arch/arm/boot/dts/rk3288.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
index 22316d0..1996452 100644
--- a/arch/arm/boot/dts/rk3288.dtsi
+++ b/arch/arm/boot/dts/rk3288.dtsi

@@ -359,6 +359,8 @@
                clock-names = "baudclk", "apb_pclk";
                pinctrl-names = "default";
                pinctrl-0 = <&uart0_xfer>;
+               dmas = <&dmac_peri 1>, <&dmac_peri 2>;
+               dma-names = "tx", "rx";
                status = "disabled";
        };

@@ -372,6 +374,8 @@
                clock-names = "baudclk", "apb_pclk";
                pinctrl-names = "default";
                pinctrl-0 = <&uart1_xfer>;
+               dmas = <&dmac_peri 3>, <&dmac_peri 4>;
+               dma-names = "tx", "rx";
                status = "disabled";
        };

@@ -385,6 +389,8 @@
                clock-names = "baudclk", "apb_pclk";
                pinctrl-names = "default";
                pinctrl-0 = <&uart2_xfer>;
+               dmas = <&dmac_bus_s 4>, <&dmac_bus_s 5>;
+               dma-names = "tx", "rx";
                status = "disabled";
        };

@@ -398,6 +404,8 @@
                clock-names = "baudclk", "apb_pclk";
                pinctrl-names = "default";
                pinctrl-0 = <&uart3_xfer>;
+               dmas = <&dmac_peri 7>, <&dmac_peri 8>;
+               dma-names = "tx", "rx";
                status = "disabled";
        };

@@ -411,6 +419,8 @@
                clock-names = "baudclk", "apb_pclk";
                pinctrl-names = "default";
                pinctrl-0 = <&uart4_xfer>;
+               dmas = <&dmac_peri 9>, <&dmac_peri 10>;
+               dma-names = "tx", "rx";
                status = "disabled";
        };

--

1.9.1