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Message-ID: <20250621112311.68101-1-aford173@gmail.com>
Date: Sat, 21 Jun 2025 06:23:09 -0500
From: Adam Ford <aford173@...il.com>
To: linux-arm-kernel@...ts.infradead.org
Cc: aford@...conembedded.com,
Adam Ford <aford173@...il.com>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
devicetree@...r.kernel.org,
imx@...ts.linux.dev,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] arm64: dts: imx8mm: Configure DMA on UART2
UART2 is often used as the console, so the DMA was likely left
off on purpose, since it's recomended to not use the DMA on the
console. Beacause, the driver checks to see if the UART is used for
the console when determining if it should initialize DMA, it
should be safe to enable DMA on UART2 for all users.
Signed-off-by: Adam Ford <aford173@...il.com>
diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index cfebaa01217e..ded89b046970 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -915,6 +915,8 @@ uart2: serial@...90000 {
clocks = <&clk IMX8MM_CLK_UART2_ROOT>,
<&clk IMX8MM_CLK_UART2_ROOT>;
clock-names = "ipg", "per";
+ dmas = <&sdma1 24 4 0>, <&sdma1 25 4 0>;
+ dma-names = "rx", "tx";
status = "disabled";
};
};
--
2.48.1
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