dts: rp1: Disable DMA usage for UART0

Some recent DMA changes have led to data loss in UART0 on Pi 5. It also seems that even prior to these changes there was a problem with aborted transfers. As this is the only RP1 UART configured for DMA, it is better to remove the DMA usage until it is shown to be reliable. Link: #6365 Signed-off-by: Phil Elwell <[email protected]>
raspberrypi · Sep 18, 2024 · cc63d55 · cc63d55
1 parent c132137
commit cc63d55
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/arch/arm64/boot/dts/broadcom/rp1.dtsi b/arch/arm64/boot/dts/broadcom/rp1.dtsi
@@ -55,9 +55,9 @@
 			interrupts = <RP1_INT_UART0 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&rp1_clocks RP1_CLK_UART &rp1_clocks RP1_PLL_SYS_PRI_PH>;
 			clock-names = "uartclk", "apb_pclk";
-			dmas = <&rp1_dma RP1_DMA_UART0_TX>,
-			       <&rp1_dma RP1_DMA_UART0_RX>;
-			dma-names = "tx", "rx";
+			// dmas = <&rp1_dma RP1_DMA_UART0_TX>,
+			//        <&rp1_dma RP1_DMA_UART0_RX>;
+			// dma-names = "tx", "rx";
 			pinctrl-names = "default";
 			arm,primecell-periphid = <0x00541011>;
 			uart-has-rtscts;