linux-kernel - [PATCH] arm64: dts: rockchip: rk3399: Hook up DMA for UARTs

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Date:   Tue, 21 Sep 2021 01:56:47 +0800
From:   Chen-Yu Tsai <wens@...nel.org>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Chen-Yu Tsai <wens@...e.org>, Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: rockchip: rk3399: Hook up DMA for UARTs

From: Chen-Yu Tsai <wens@...e.org>

The RK3399 has two DMA controllers, one of which is wired up to work
with the SPI controllers and UARTs. The SPI controllers are already
hooked up, but the UARTs aren't.

Add the "dmas" and "dma-names" to the UART device nodes to hook up DMA.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index 3871c7fd83b0..87d6e4eb1337 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -608,6 +608,8 @@ uart0: serial@...80000 {
 		reg = <0x0 0xff180000 0x0 0x100>;
 		clocks = <&cru SCLK_UART0>, <&cru PCLK_UART0>;
 		clock-names = "baudclk", "apb_pclk";
+		dmas = <&dmac_peri 0>, <&dmac_peri 1>;
+		dma-names = "tx", "rx";
 		interrupts = <GIC_SPI 99 IRQ_TYPE_LEVEL_HIGH 0>;
 		reg-shift = <2>;
 		reg-io-width = <4>;
@@ -621,6 +623,8 @@ uart1: serial@...90000 {
 		reg = <0x0 0xff190000 0x0 0x100>;
 		clocks = <&cru SCLK_UART1>, <&cru PCLK_UART1>;
 		clock-names = "baudclk", "apb_pclk";
+		dmas = <&dmac_peri 2>, <&dmac_peri 3>;
+		dma-names = "tx", "rx";
 		interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH 0>;
 		reg-shift = <2>;
 		reg-io-width = <4>;
@@ -634,6 +638,8 @@ uart2: serial@...a0000 {
 		reg = <0x0 0xff1a0000 0x0 0x100>;
 		clocks = <&cru SCLK_UART2>, <&cru PCLK_UART2>;
 		clock-names = "baudclk", "apb_pclk";
+		dmas = <&dmac_peri 4>, <&dmac_peri 5>;
+		dma-names = "tx", "rx";
 		interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH 0>;
 		reg-shift = <2>;
 		reg-io-width = <4>;
@@ -647,6 +653,8 @@ uart3: serial@...b0000 {
 		reg = <0x0 0xff1b0000 0x0 0x100>;
 		clocks = <&cru SCLK_UART3>, <&cru PCLK_UART3>;
 		clock-names = "baudclk", "apb_pclk";
+		dmas = <&dmac_peri 6>, <&dmac_peri 7>;
+		dma-names = "tx", "rx";
 		interrupts = <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH 0>;
 		reg-shift = <2>;
 		reg-io-width = <4>;
@@ -1142,6 +1150,8 @@ uart4: serial@...70000 {
 		reg = <0x0 0xff370000 0x0 0x100>;
 		clocks = <&pmucru SCLK_UART4_PMU>, <&pmucru PCLK_UART4_PMU>;
 		clock-names = "baudclk", "apb_pclk";
+		dmas = <&dmac_peri 8>, <&dmac_peri 9>;
+		dma-names = "tx", "rx";
 		interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH 0>;
 		reg-shift = <2>;
 		reg-io-width = <4>;
-- 
2.30.2