iommu/arm-smmu: tegra: Detect number of instances at runtime

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Parse the reg property in device tree and detect the number of instances
represented by a device tree node. This is subsequently needed in order
to support single-instance SMMUs with the Tegra implementation because
additional programming is needed to properly configure the SID override
registers in the memory controller.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20210603164632.1000458-5-thierry.reding@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

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Thierry Reding 2021-06-03 18:46:27 +02:00 • committed by Krzysztof Kozlowski

parent 4287861dca

commit 7ecbf253f8

1 changed files with 41 additions and 16 deletions

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drivers/iommu/arm/arm-smmu/arm-smmu-nvidia.c

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