linux-kernel - [PATCH] ARM: dts: rockchip: use DMA channels for UARTs of TinkerBoard

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Message-Id: <20200314142327.25568-1-katsuhiro@katsuster.net>
Date:   Sat, 14 Mar 2020 23:23:27 +0900
From:   Katsuhiro Suzuki <katsuhiro@...suster.net>
To:     Heiko Stuebner <heiko@...ech.de>,
        linux-rockchip@...ts.infradead.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Katsuhiro Suzuki <katsuhiro@...suster.net>
Subject: [PATCH] ARM: dts: rockchip: use DMA channels for UARTs of TinkerBoard

This patch enables to use DMAC for all UARTs that are connected to
dmac_peri core for TinkerBoard.

Only uart2 is connected different DMAC (dmac_bus_s) so keep current
settings on this patch.

Signed-off-by: Katsuhiro Suzuki <katsuhiro@...suster.net>
---
 arch/arm/boot/dts/rk3288-tinker.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/rk3288-tinker.dtsi b/arch/arm/boot/dts/rk3288-tinker.dtsi
index 312582c1bd37..6efabeaf3c6d 100644
--- a/arch/arm/boot/dts/rk3288-tinker.dtsi
+++ b/arch/arm/boot/dts/rk3288-tinker.dtsi
@@ -491,10 +491,14 @@ &tsadc {
 };
 
 &uart0 {
+	dmas = <&dmac_peri 1>, <&dmac_peri 2>;
+	dma-names = "tx", "rx";
 	status = "okay";
 };
 
 &uart1 {
+	dmas = <&dmac_peri 3>, <&dmac_peri 4>;
+	dma-names = "tx", "rx";
 	status = "okay";
 };
 
@@ -503,10 +507,14 @@ &uart2 {
 };
 
 &uart3 {
+	dmas = <&dmac_peri 7>, <&dmac_peri 8>;
+	dma-names = "tx", "rx";
 	status = "okay";
 };
 
 &uart4 {
+	dmas = <&dmac_peri 9>, <&dmac_peri 10>;
+	dma-names = "tx", "rx";
 	status = "okay";
 };
 
-- 
2.25.1