Hi everyone. On Mon, 2020-06-29 at 18:18 +0200, Nicolas Saenz Julienne wrote: > On the Raspberry Pi 4, after a PCI reset, VL805's firmware may either be > loaded directly from an EEPROM or, if not present, by the SoC's > co-processor, VideoCore. This series reworks how we handle this. > > The previous solution makes use of PCI quirks and exporting platform > specific functions. Albeit functional it feels pretty shoehorned. This > proposes an alternative way of handling the triggering of the xHCI chip > initialization trough means of a reset controller. > > The benefits are pretty evident: less platform churn in core xHCI code, > and no explicit device dependency management in pcie-brcmstb. > > Note that patch #1 depends on another series[1], that was just applied > into the clk maintainer's tree. > > The series is based on v5.8-rc3 > > v3: https://www.spinics.net/lists/arm-kernel/msg813612.html > v2: https://lkml.org/lkml/2020/6/9/875 > v1: https://lore.kernel.org/linux-usb/20200608192701.18355-1-nsaenzjulienne@xxxxxxx/T/#t > > [1] https://lore.kernel.org/linux-clk/159304773261.62212.983376627029743900@xxxxxxxxxxxxxxxxxxxxxxxxxx/T/#t > > --- We were waiting on a dependency to be merged upstream to get this. They are now in, so could we move things forward? I can take the device tree patches, I guess philipp can take the reset controller code. But I'm not so sure who should be taking the PCI/USB counterparts. Regards, Nicolas > > Changes since v4: > - Adress Andy's comments > > Changes since v3: > - Rework dt patch to include root bridge as a separate node > - Update xhci-pci patch now that the xhci dev has a dt node (it was > getting it in the past from its bus) > > Changes since v2: > - Add reset to resume routine in xhci-pci > - Correct of refcount in pci-quirks > - Correct typos > - Use include file to define firmware reset IDs > > Changes since v1: > - Rework reset controller so it's less USB centric > - Use correct reset controller API in xhci-pci > - Correct typos > > Nicolas Saenz Julienne (9): > dt-bindings: reset: Add a binding for the RPi Firmware reset > controller > reset: Add Raspberry Pi 4 firmware reset controller > ARM: dts: bcm2711: Add firmware usb reset node > ARM: dts: bcm2711: Add reset controller to xHCI node > usb: xhci-pci: Add support for reset controllers > Revert "USB: pci-quirks: Add Raspberry Pi 4 quirk" > usb: host: pci-quirks: Bypass xHCI quirks for Raspberry Pi 4 > Revert "firmware: raspberrypi: Introduce vl805 init routine" > Revert "PCI: brcmstb: Wait for Raspberry Pi's firmware when present" > > .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 21 +++ > arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 22 ++++ > drivers/firmware/Kconfig | 3 +- > drivers/firmware/raspberrypi.c | 61 --------- > drivers/pci/controller/pcie-brcmstb.c | 17 --- > drivers/reset/Kconfig | 11 ++ > drivers/reset/Makefile | 1 + > drivers/reset/reset-raspberrypi.c | 122 ++++++++++++++++++ > drivers/usb/host/pci-quirks.c | 22 ++-- > drivers/usb/host/xhci-pci.c | 10 ++ > drivers/usb/host/xhci.h | 2 + > .../reset/raspberrypi,firmware-reset.h | 13 ++ > include/soc/bcm2835/raspberrypi-firmware.h | 7 - > 13 files changed, 215 insertions(+), 97 deletions(-) > create mode 100644 drivers/reset/reset-raspberrypi.c > create mode 100644 include/dt-bindings/reset/raspberrypi,firmware-reset.h >
