8f9e91ad03
These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
43 lines
1.7 KiB
Diff
43 lines
1.7 KiB
Diff
From 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Tue, 6 May 2025 13:37:00 +0100
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Subject: [PATCH] arm64: dts: bcm2712-rpi: Add uart0_dma parameter
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It seems that some applications don't work with UART DMA enabled, while
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others don't work without it. No DMA seems to be the safer default
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choice, but add a dtparam - uart0_dma - to re-enable it.
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See: 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/arm/boot/dts/overlays/README | 3 +++
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arch/arm64/boot/dts/broadcom/bcm2712-rpi.dtsi | 5 +++++
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2 files changed, 8 insertions(+)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -460,6 +460,9 @@ Params:
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6, 8 and 10 of the 40-way header (2712 only,
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default "off")
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+ uart0_dma Enable DMA usage on UART0 (2712 only, default
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+ "off")
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+
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uart1 Set to "on" or "off" to enable or disable uart1
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(default varies)
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--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi.dtsi
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+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi.dtsi
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@@ -220,6 +220,11 @@ pio: &rp1_pio {
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suspend = <&pwr_key>, "linux,code:0=205";
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uart0 = <&uart0>, "status";
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uart0_console = <&uart0>,"status", <&aliases>, "console=",&uart0;
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+ uart0_dma = <&uart0>,"dmas:0=",<&rp1_dma>,
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+ <&uart0>,"dmas:4=",<RP1_DMA_UART0_TX>,
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+ <&uart0>,"dmas:8=",<&rp1_dma>,
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+ <&uart0>,"dmas:12=",<RP1_DMA_UART0_RX>,
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+ <&uart0>,"dma-names[=747800727800"; // "tx", "rx"
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wifiaddr = <&wifi>, "local-mac-address[";
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cam0_reg = <&cam0_reg>,"status";
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