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Commit a2d866f7 authored by Robin Murphy's avatar Robin Murphy Committed by Will Deacon
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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: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 90df373c

drivers/iommu/arm-smmu.c

+11 −0
Original line number Diff line number Diff line
@@ -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,