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iommu/arm-smmu: Update impl quirks comment 

The comment about implementation and integration quirks being
mutually-exclusive is out of date, and in fact the code is already
structured for the case it anticipates, so document that properly.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/1e742177e084621f3454fbaf768325a6c215656a.1592994291.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Robin Murphy 2020-06-24 11:24:51 +01:00 committed by Will Deacon
parent ecd7274fb4
commit 976492922a
1 changed files with 4 additions and 4 deletions
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8
drivers/iommu/arm-smmu-impl.c
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@ -153,10 +153,9 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
const struct device_node *np = smmu->dev->of_node;
/*
* We will inevitably have to combine model-specific implementation
* quirks with platform-specific integration quirks, but everything
* we currently support happens to work out as straightforward
* mutually-exclusive assignments.
* Set the impl for model-specific implementation quirks first,
* such that platform integration quirks can pick it up and
* inherit from it if necessary.
*/
switch (smmu->model) {
case ARM_MMU500:
@ -168,6 +167,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
break;
}
/* This is implicitly MMU-400 */
if (of_property_read_bool(np, "calxeda,smmu-secure-config-access"))
smmu->impl = &calxeda_impl;