From a2d866f7d66574d980a2e4544bc626e29bb33365 Mon Sep 17 00:00:00 2001 From: Robin Murphy Date: Tue, 8 Aug 2017 14:56:15 +0100 Subject: [PATCH] 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 Signed-off-by: Will Deacon --- drivers/iommu/arm-smmu.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 0a5fa126f379..445f0ea38272 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,