target/linux/bcm27xx/patches-5.15/950-0652-overlays-Add-vl805-overlay.patch

   1 From 2f1c8eedc108d458fb2566ec582cbd7c45fc280b Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Wed, 12 Jan 2022 12:48:53 +0000
   4 Subject: [PATCH] overlays: Add vl805 overlay
   5
   6 With the automatic VL805 support being removed from the standard
   7 CM4 dtb (since most CM4 carriers don't have a VL805), retain support
   8 on those that do by creating a "vl805" overlay that restores the
   9 deleted "usb@0,0" node.
  10
  11 The "vl805" overlay will be loaded automatically (after an upcoming
  12 firmware update) on CM4 boards where the EEPROM config includes the
  13 setting VL805=1.
  14
  15 See: https://forums.raspberrypi.com/viewtopic.php?t=326088
  16
  17 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  18 ---
  19  arch/arm/boot/dts/overlays/Makefile          |  1 +
  20  arch/arm/boot/dts/overlays/README            |  8 ++++++++
  21  arch/arm/boot/dts/overlays/vl805-overlay.dts | 18 ++++++++++++++++++
  22  3 files changed, 27 insertions(+)
  23  create mode 100644 arch/arm/boot/dts/overlays/vl805-overlay.dts
  24
  25 --- a/arch/arm/boot/dts/overlays/Makefile
  26 +++ b/arch/arm/boot/dts/overlays/Makefile
  27 @@ -243,6 +243,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  28         vc4-kms-v3d-pi4.dtbo \
  29         vc4-kms-vga666.dtbo \
  30         vga666.dtbo \
  31 +       vl805.dtbo \
  32         w1-gpio.dtbo \
  33         w1-gpio-pullup.dtbo \
  34         w5500.dtbo \
  35 --- a/arch/arm/boot/dts/overlays/README
  36 +++ b/arch/arm/boot/dts/overlays/README
  37 @@ -3744,6 +3744,14 @@ Load:   dtoverlay=vga666
  38  Params: <None>
  39
  40
  41 +Name:   vl805
  42 +Info:   Overlay to enable a VIA VL805 USB3 controller on CM4 carriers
  43 +        Will be loaded automatically by up-to-date firmware if "VL805=1" is
  44 +        set in the EEPROM config.
  45 +Load:   dtoverlay=vl805
  46 +Params: <None>
  47 +
  48 +
  49  Name:   w1-gpio
  50  Info:   Configures the w1-gpio Onewire interface module.
  51          Use this overlay if you *don't* need a GPIO to drive an external pullup.
  52 --- /dev/null
  53 +++ b/arch/arm/boot/dts/overlays/vl805-overlay.dts
  54 @@ -0,0 +1,18 @@
  55 +/dts-v1/;
  56 +/plugin/;
  57 +
  58 +#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
  59 +
  60 +/ {
  61 +       compatible = "brcm,bcm2711";
  62 +
  63 +       fragment@0 {
  64 +               target-path = "pcie0/pci@0,0";
  65 +               __overlay__ {
  66 +                       usb@0,0 {
  67 +                               reg = <0 0 0 0 0>;
  68 +                               resets = <&reset RASPBERRYPI_FIRMWARE_RESET_ID_USB>;
  69 +                       };
  70 +               };
  71 +       };
  72 +};