Re: [PATCH v5 0/9] Raspberry Pi 4 USB firmware initialization rework

[Florian Fainelli]

On 8/13/2020 3:01 AM, Nicolas Saenz Julienne wrote:
> 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.

Should we route everything through the USB tree since that is where the 
changes that do require synchronization with other subsystems and DTS is 
needed the most?
--
Florian