Newer revisions of the RPi4 need their xHCI chip, VL805, firmware to be
loaded explicitly. Earlier versions didn't need that as they where using
an EEPROM for that purpose. This series takes care of setting up the
relevant infrastructure and run the firmware loading routine at the
right moment.
Note that this builds on top of Sylwester Nawrocki's "USB host support
for Raspberry Pi 4 board" series.
This works hand in hand with a series of device tree changes on the
Linux device tree that are still being reviewed:
https://patchwork.kernel.org/patch/11596403/
https://patchwork.kernel.org/patch/11596409/
---
Changes since v3:
- Use reset controller
Changes since v2:
- Correct comment on patch #1
- Address Matthias' comments
Changes since v1:
- Rename function
- Use callback in xhci-pci.c
Nicolas Saenz Julienne (5):
arm: rpi: Add function to trigger VL805's firmware load
reset: Add Raspberry Pi 4 firmware reset controller
configs: Enable support for reset controllers on RPi4
dm: pci: Assign controller device node to root bridge
usb: xhci-pci: Add reset controller support
arch/arm/mach-bcm283x/include/mach/mbox.h | 13 ++++
arch/arm/mach-bcm283x/include/mach/msg.h | 7 +++
arch/arm/mach-bcm283x/msg.c | 46 ++++++++++++++
configs/rpi_4_32b_defconfig | 1 +
configs/rpi_4_defconfig | 1 +
configs/rpi_arm64_defconfig | 1 +
drivers/pci/pci-uclass.c | 15 ++++-
drivers/reset/Kconfig | 10 ++++
drivers/reset/Makefile | 1 +
drivers/reset/reset-raspberrypi.c | 60 +++++++++++++++++++
drivers/usb/host/xhci-pci.c | 38 +++++++++++-
.../reset/raspberrypi,firmware-reset.h | 13 ++++
12 files changed, 203 insertions(+), 3 deletions(-)
create mode 100644 drivers/reset/reset-raspberrypi.c
create mode 100644 include/dt-bindings/reset/raspberrypi,firmware-reset.h