On Tue, Jun 29, 2021 at 12:31:28PM +0200, Mauro Carvalho Chehab wrote:

platform drvdata can't be used inside the regulator driver,
as this is already used by the MFD and SPMI drivers.

Can you clarify what exactly is using which platform drvdata already?
This all feels very confused and I can't tell what the problem that's
being fixed is, if it's a real issue or how this fixes it.

 drivers/misc/hi6421v600-irq.c               |  9 ++--
 drivers/regulator/hi6421v600-regulator.c    | 49 +++++++++++----------
 drivers/staging/hikey9xx/hi6421-spmi-pmic.c | 18 +++-----
 include/linux/mfd/hi6421-spmi-pmic.h        | 25 -----------

I'm especially nervous about the core driver still being in staging
perhaps meaning there's some issue with it doing odd and confusing
things.