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35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
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From cc63d552b9aab92fb581dfb08267d5af697f477b Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 18 Sep 2024 16:45:24 +0100
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Subject: [PATCH 1267/1350] dts: rp1: Disable DMA usage for UART0
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Some recent DMA changes have led to data loss in UART0 on Pi 5. It also
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seems that even prior to these changes there was a problem with aborted
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transfers.
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As this is the only RP1 UART configured for DMA, it is better to remove
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the DMA usage until it is shown to be reliable.
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Link: https://github.com/raspberrypi/linux/issues/6365
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm64/boot/dts/broadcom/rp1.dtsi | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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--- a/arch/arm64/boot/dts/broadcom/rp1.dtsi
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+++ b/arch/arm64/boot/dts/broadcom/rp1.dtsi
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@@ -55,9 +55,9 @@
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interrupts = <RP1_INT_UART0 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&rp1_clocks RP1_CLK_UART &rp1_clocks RP1_PLL_SYS_PRI_PH>;
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clock-names = "uartclk", "apb_pclk";
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- dmas = <&rp1_dma RP1_DMA_UART0_TX>,
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- <&rp1_dma RP1_DMA_UART0_RX>;
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- dma-names = "tx", "rx";
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+ // dmas = <&rp1_dma RP1_DMA_UART0_TX>,
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+ // <&rp1_dma RP1_DMA_UART0_RX>;
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+ // dma-names = "tx", "rx";
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pinctrl-names = "default";
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arm,primecell-periphid = <0x00541011>;
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uart-has-rtscts;
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