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SubjectRe: [PATCH 0/6] irqchip: Hybrid probing
On Sat, Sep 12, 2020 at 5:52 AM Marc Zyngier <> wrote:
> A recent attempt at converting a couple of interrupt controllers from
> early probing to standard platform drivers have badly failed, as it
> became evident that although an interrupt controller can easily probe
> late, device drivers for the endpoints connected to it are rarely
> equipped to deal with probe deferral. Changes were swiftly reverted.
> However, there is some value in *optionally* enabling this, if only
> for development purposes, as there is otherwise a "chicken and egg"
> problem, and a few people (cc'd) are working on a potential solution.
> This short series enables the infrastructure for modular building
> whilst retaining the usual early probing for monolithic build, and
> introduces it to the three drivers that were previously made to probe
> as platform drivers.
> As I don't have any of the HW, this series is fully untested and I'd
> welcome some feedback on it.

I've tested this on db845c along with a small follow-on patch I'll
send to you which sets the qcom-pdc as a tristate in the Kconfig, both
as a module and as a built-in.

Tested-by: John Stultz <>


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