mirror of
https://github.com/Ysurac/openmptcprouter.git
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83 lines
2.1 KiB
Diff
83 lines
2.1 KiB
Diff
From 1eb02cea8d21d6803d86ff7081bb333ac87ccdd1 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Thu, 19 Oct 2023 09:17:25 +0100
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Subject: [PATCH] overlays: Add Pi 5 version of dwc2
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Most bus masters on Pi 5 have access to at least the lower 4GB, but
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the old DWC OTG controller is still restricted to the first 1GB.
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Create a Pi 5-specific version of the overlay including a fragment
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that ensures the swiotlb bounce buffers are allocated in that
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area.
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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/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 4 ++++
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.../arm/boot/dts/overlays/dwc2-pi5-overlay.dts | 18 ++++++++++++++++++
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arch/arm/boot/dts/overlays/overlay_map.dts | 10 ++++++++++
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4 files changed, 33 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/dwc2-pi5-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -59,6 +59,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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draws.dtbo \
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dwc-otg.dtbo \
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dwc2.dtbo \
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+ dwc2-pi5.dtbo \
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edt-ft5406.dtbo \
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enc28j60.dtbo \
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enc28j60-spi2.dtbo \
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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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@@ -1107,6 +1107,10 @@ Params: dr_mode Dual rol
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mode
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+Name: dwc2-pi5
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+Info: See dwc2 (this is the Pi 5 version)
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+
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+
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[ The ds1307-rtc overlay has been deleted. See i2c-rtc. ]
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/dwc2-pi5-overlay.dts
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@@ -0,0 +1,18 @@
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+#include "dwc2-overlay.dts"
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+
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+/{
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+ fragment@1 {
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+ target = <&soc>;
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+ __overlay__ {
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+ /*
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+ * Add a node with a dma-ranges value that exists only to be found
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+ * by of_dma_get_max_cpu_address, and hence limit the DMA zone.
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+ */
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+ zone_dma {
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+ #address-cells = <1>;
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+ #size-cells = <1>;
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+ dma-ranges = <0x0 0x0 0x0 0x40000000>;
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+ };
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+ };
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+ };
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+};
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--- a/arch/arm/boot/dts/overlays/overlay_map.dts
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+++ b/arch/arm/boot/dts/overlays/overlay_map.dts
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@@ -48,6 +48,16 @@
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bcm2712;
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};
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+ dwc2 {
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+ bcm2835;
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+ bcm2711;
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+ bcm2712 = "dwc2-pi5";
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+ };
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+
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+ dwc2-pi5 {
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+ bcm2712;
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+ };
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+
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highperi {
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bcm2711;
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};
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