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    SubjectRe: [PATCH] regulator: wm8994: Use PROBE_FORCE_SYNCHRONOUS
    On Thu, Mar 23, 2023 at 05:49:28PM +0000, Mark Brown wrote:
    > On Thu, Mar 23, 2023 at 05:45:31PM +0000, Charles Keepax wrote:
    >
    > > I think really the best place to look at this would be at the
    > > regulator level. It is fine if mfd_add_devices passes, the problem
    > > really is that the regulator core doesn't realise the regulator is
    > > going to be arriving, and thus returns a dummy regulator, rather
    > > than returning EPROBE_DEFER. If it did the MFD driver would probe
    > > defer at the point of requesting the regulator, which would all
    > > make sense.
    >
    > You need the MFD to tell the regulator subsystem that there's a
    > regulator bound there, or to force all the users to explicitly do the
    > mapping of the regulator in their firmwares (which isn't really a
    > viable approach).

    Yeah changing the firmware situation is definitely not a goer. I
    need to just clarify in my head exactly what is missing, with
    respect to the know the regulator exists.

    Thanks,
    Charles

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