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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(-) -- 2.51.0