[PATCH 0/2] mfd: syscon: introduce no-auto-mmio DT property

[Dan Carpenter <dan.carpenter@linaro.org>]

Most syscons are accessed via MMMIO and created automatically.  But one
example of a syscon that isn't is in drivers/soc/samsung/exynos-pmu.c
where the syscon can only be accessed via the secure partition.  We are
looking at upstreaming a different driver where the syscon will be
accessed via SCMI.

Normally, syscons are accessed by doing something like
syscon_regmap_lookup_by_phandle_args() but that function will
automatically create an MMIO syscon if one hasn't been registered.  So
the ordering becomes a problem.  The exynos-pmu.c driver solves this
but it's a bit awkward and it would be even trickier if there were
several drivers accessing the same syscon.

Dan Carpenter (2):
  dt-bindings: mfd: syscon: introduce no-auto-mmio property for syscons
  mfd: syscon: Don't auto create "no-auto-mmio" syscons

 Documentation/devicetree/bindings/mfd/syscon.yaml |  4 ++++
 drivers/mfd/syscon.c                              | 10 ++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

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2.51.0