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| author | Robin Murphy <robin.murphy@arm.com> | 2017-08-08 14:56:15 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-08-16 17:27:29 +0100 |
| commit | a2d866f7d66574d980a2e4544bc626e29bb33365 (patch) | |
| tree | 87dba0b5d3c1d77e4f5dddb2690ce43abdf07660 | |
| parent | 90df373cc62e527b010025249d11d10d19b086bd (diff) | |
| download | op-kernel-dev-a2d866f7d66574d980a2e4544bc626e29bb33365.zip op-kernel-dev-a2d866f7d66574d980a2e4544bc626e29bb33365.tar.gz | |
iommu/arm-smmu: Add system PM support
With all our hardware state tracked in such a way that we can naturally
restore it as part of the necessary reset, resuming is trivial, and
there's nothing to do on suspend at all.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 0a5fa12..445f0ea 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -2372,10 +2372,21 @@ static void arm_smmu_device_shutdown(struct platform_device *pdev) arm_smmu_device_remove(pdev); } +static int __maybe_unused arm_smmu_pm_resume(struct device *dev) +{ + struct arm_smmu_device *smmu = dev_get_drvdata(dev); + + arm_smmu_device_reset(smmu); + return 0; +} + +static SIMPLE_DEV_PM_OPS(arm_smmu_pm_ops, NULL, arm_smmu_pm_resume); + static struct platform_driver arm_smmu_driver = { .driver = { .name = "arm-smmu", .of_match_table = of_match_ptr(arm_smmu_of_match), + .pm = &arm_smmu_pm_ops, }, .probe = arm_smmu_device_probe, .remove = arm_smmu_device_remove, |
