linux-kernel - [PATCH 2/2] rockchip: dts: Enable UART DMA by adding default dma-names property

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250917114932.25994-3-lists@wildgooses.com>
Date: Wed, 17 Sep 2025 11:49:31 +0000
From: Ed Wildgoose <lists@...dgooses.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Ed Wildgoose <lists@...dgooses.com>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] rockchip: dts: Enable UART DMA by adding default dma-names property

Kernel appears to need a dma-names set for DMA to actually enable. Set a
default dma-names property for all UARTs defined in the base rk356x-base
dtsi

This is tested on a Radxa Zero 3W (which has 5x UARTs) and removes the
warnings and enables DMA on this platform

Signed-off-by: Ed Wildgoose <lists@...dgooses.com>
---
 arch/arm64/boot/dts/rockchip/rk356x-base.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
index fd2214b6f..55240f76d 100644
--- a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi
@@ -1334,6 +1334,7 @@ uart1: serial@...50000 {
 		clocks = <&cru SCLK_UART1>, <&cru PCLK_UART1>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 2>, <&dmac0 3>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart1m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1348,6 +1349,7 @@ uart2: serial@...60000 {
 		clocks = <&cru SCLK_UART2>, <&cru PCLK_UART2>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 4>, <&dmac0 5>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart2m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1362,6 +1364,7 @@ uart3: serial@...70000 {
 		clocks = <&cru SCLK_UART3>, <&cru PCLK_UART3>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 6>, <&dmac0 7>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart3m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1376,6 +1379,7 @@ uart4: serial@...80000 {
 		clocks = <&cru SCLK_UART4>, <&cru PCLK_UART4>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 8>, <&dmac0 9>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart4m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1390,6 +1394,7 @@ uart5: serial@...90000 {
 		clocks = <&cru SCLK_UART5>, <&cru PCLK_UART5>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 10>, <&dmac0 11>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart5m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1404,6 +1409,7 @@ uart6: serial@...a0000 {
 		clocks = <&cru SCLK_UART6>, <&cru PCLK_UART6>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 12>, <&dmac0 13>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart6m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1418,6 +1424,7 @@ uart7: serial@...b0000 {
 		clocks = <&cru SCLK_UART7>, <&cru PCLK_UART7>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 14>, <&dmac0 15>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart7m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1432,6 +1439,7 @@ uart8: serial@...c0000 {
 		clocks = <&cru SCLK_UART8>, <&cru PCLK_UART8>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 16>, <&dmac0 17>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart8m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
@@ -1446,6 +1454,7 @@ uart9: serial@...d0000 {
 		clocks = <&cru SCLK_UART9>, <&cru PCLK_UART9>;
 		clock-names = "baudclk", "apb_pclk";
 		dmas = <&dmac0 18>, <&dmac0 19>;
+		dma-names = "tx", "rx";
 		pinctrl-0 = <&uart9m0_xfer>;
 		pinctrl-names = "default";
 		reg-io-width = <4>;
-- 
2.49.0