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iommu: arm-smmu: Add Deepsleep support for smmu

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Add Deepsleep support for arm-smmu driver.

Change-Id: Id95f84c1670dd5a0f7265898bed3af8b9d960428
Signed-off-by: Nagireddy Annem <quic_nannem@quicinc.com>
This commit is contained in:
Nagireddy Annem
2022-12-19 16:10:19 +05:30
parent 12abfda3e9
commit 21da64c0bf
1 changed files with 30 additions and 19 deletions
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49
drivers/iommu/arm/arm-smmu/arm-smmu.c
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@@ -3675,7 +3675,7 @@ static int __maybe_unused arm_smmu_runtime_suspend(struct device *dev)
return 0;
}
static int __maybe_unused arm_smmu_pm_resume(struct device *dev)
static int __maybe_unused arm_smmu_pm_resume_common(struct device *dev)
{
int ret;
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
@@ -3702,23 +3702,6 @@ static int __maybe_unused arm_smmu_pm_resume(struct device *dev)
return ret;
}
static int __maybe_unused arm_smmu_pm_suspend(struct device *dev)
{
int ret = 0;
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
if (pm_runtime_suspended(dev))
goto clk_unprepare;
ret = arm_smmu_runtime_suspend(dev);
if (ret)
return ret;
clk_unprepare:
clk_bulk_unprepare(smmu->num_clks, smmu->clks);
return ret;
}
static int __maybe_unused arm_smmu_pm_restore_early(struct device *dev)
{
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
@@ -3751,7 +3734,7 @@ static int __maybe_unused arm_smmu_pm_restore_early(struct device *dev)
smmu_domain->pgtbl_ops = pgtbl_ops;
arm_smmu_init_context_bank(smmu_domain, pgtbl_cfg);
}
arm_smmu_pm_resume(dev);
arm_smmu_pm_resume_common(dev);
ret = arm_smmu_runtime_suspend(dev);
if (ret) {
dev_err(dev, "Failed to suspend\n");
@@ -3799,6 +3782,34 @@ static int arm_smmu_pm_prepare(struct device *dev)
return (atomic_read(&dev->power.usage_count) == 1) ? -EINPROGRESS : 0;
}
static int __maybe_unused arm_smmu_pm_suspend(struct device *dev)
{
int ret = 0;
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
if (pm_suspend_via_firmware())
arm_smmu_pm_freeze_late(dev);
if (pm_runtime_suspended(dev))
goto clk_unprepare;
ret = arm_smmu_runtime_suspend(dev);
if (ret)
return ret;
clk_unprepare:
clk_bulk_unprepare(smmu->num_clks, smmu->clks);
return ret;
}
static int __maybe_unused arm_smmu_pm_resume(struct device *dev)
{
if (pm_suspend_via_firmware())
return arm_smmu_pm_restore_early(dev);
else
return arm_smmu_pm_resume_common(dev);
}
static const struct dev_pm_ops arm_smmu_pm_ops = {
SET_RUNTIME_PM_OPS(arm_smmu_runtime_suspend,
arm_smmu_runtime_resume, NULL)