iommu/qcom: restore IOMMU state if needed

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If the IOMMU has a power domain then some state will be lost in
qcom_iommu_suspend and TZ will reset device if we don't call
qcom_scm_restore_sec_cfg before accessing it again.

Signed-off-by: Vladimir Lypak <vladimir.lypak@gmail.com>
[luca@z3ntu.xyz: reword commit message a bit]
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20231011-msm8953-iommu-restore-v1-1-48a0c93809a2@z3ntu.xyz
Signed-off-by: Will Deacon <will@kernel.org>

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Vladimir Lypak 2023-10-11 19:57:26 +02:00 • committed by Will Deacon

parent 28af105cb6

commit 268dd4edb7

1 changed files with 9 additions and 1 deletions

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

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