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Thu, 08 Oct 2026 08:36:58 -0700 (PDT) Received: from arch.localdomain ([161.33.202.10]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cd35736f232sm263479a12.26.2026.10.08.08.36.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Oct 2026 08:36:57 -0700 (PDT) From: Jun Yan To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner Cc: Jun Yan , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] arm64: dts: rockchip: Add dma-names to RK356x UART nodes Date: Thu, 8 Oct 2026 23:36:16 +0800 Message-ID: <20261008153620.238580-1-jerrysteve1101@gmail.com> X-Mailer: git-send-email 2.56.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261008_083659_743319_17F61D30 X-CRM114-Status: GOOD ( 10.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The RK356x UART nodes define a dmas property but omit the matching dma-names property, so the 8250 driver fails to request a DMA channel and falls back to PIO, logging: of_dma_request_slave_channel: dma-names property of node '/serial@fe650000' missing or empty Add the missing dma-names = "tx", "rx" to uart0 through uart9, matching other Rockchip SoCs such as the RK3308. Signed-off-by: Jun Yan --- arch/arm64/boot/dts/rockchip/rk356x-base.dtsi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi index a5832895bd39..098493c04ecc 100644 --- a/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk356x-base.dtsi @@ -443,6 +443,7 @@ uart0: serial@fdd50000 { clocks = <&pmucru SCLK_UART0>, <&pmucru PCLK_UART0>; clock-names = "baudclk", "apb_pclk"; dmas = <&dmac0 0>, <&dmac0 1>; + dma-names = "tx", "rx"; pinctrl-0 = <&uart0_xfer>; pinctrl-names = "default"; reg-io-width = <4>; @@ -1449,6 +1450,7 @@ uart1: serial@fe650000 { 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>; @@ -1463,6 +1465,7 @@ uart2: serial@fe660000 { 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>; @@ -1477,6 +1480,7 @@ uart3: serial@fe670000 { 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>; @@ -1491,6 +1495,7 @@ uart4: serial@fe680000 { 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>; @@ -1505,6 +1510,7 @@ uart5: serial@fe690000 { 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>; @@ -1519,6 +1525,7 @@ uart6: serial@fe6a0000 { 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>; @@ -1533,6 +1540,7 @@ uart7: serial@fe6b0000 { 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>; @@ -1547,6 +1555,7 @@ uart8: serial@fe6c0000 { 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>; @@ -1561,6 +1570,7 @@ uart9: serial@fe6d0000 { 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>; -- 2.56.0