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73 lines
2.1 KiB
Diff
73 lines
2.1 KiB
Diff
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From 2f1c8eedc108d458fb2566ec582cbd7c45fc280b Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 12 Jan 2022 12:48:53 +0000
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Subject: [PATCH] overlays: Add vl805 overlay
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With the automatic VL805 support being removed from the standard
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CM4 dtb (since most CM4 carriers don't have a VL805), retain support
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on those that do by creating a "vl805" overlay that restores the
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deleted "usb@0,0" node.
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The "vl805" overlay will be loaded automatically (after an upcoming
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firmware update) on CM4 boards where the EEPROM config includes the
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setting VL805=1.
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See: https://forums.raspberrypi.com/viewtopic.php?t=326088
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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 | 8 ++++++++
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arch/arm/boot/dts/overlays/vl805-overlay.dts | 18 ++++++++++++++++++
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3 files changed, 27 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/vl805-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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@@ -243,6 +243,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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vc4-kms-v3d-pi4.dtbo \
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vc4-kms-vga666.dtbo \
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vga666.dtbo \
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+ vl805.dtbo \
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w1-gpio.dtbo \
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w1-gpio-pullup.dtbo \
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w5500.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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@@ -3744,6 +3744,14 @@ Load: dtoverlay=vga666
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Params: <None>
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+Name: vl805
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+Info: Overlay to enable a VIA VL805 USB3 controller on CM4 carriers
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+ Will be loaded automatically by up-to-date firmware if "VL805=1" is
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+ set in the EEPROM config.
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+Load: dtoverlay=vl805
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+Params: <None>
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+
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+
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Name: w1-gpio
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Info: Configures the w1-gpio Onewire interface module.
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Use this overlay if you *don't* need a GPIO to drive an external pullup.
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/vl805-overlay.dts
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@@ -0,0 +1,18 @@
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+/dts-v1/;
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+/plugin/;
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+
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+#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
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+
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+/ {
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+ compatible = "brcm,bcm2711";
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+
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+ fragment@0 {
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+ target-path = "pcie0/pci@0,0";
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+ __overlay__ {
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+ usb@0,0 {
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+ reg = <0 0 0 0 0>;
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+ resets = <&reset RASPBERRYPI_FIRMWARE_RESET_ID_USB>;
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+ };
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+ };
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+ };
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+};
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