diff options
Diffstat (limited to 'drivers/iommu/exynos-iommu.c')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index c65826847819..5d2033b5a5b3 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -601,6 +601,36 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int exynos_sysmmu_suspend(struct device *dev) +{ + struct sysmmu_drvdata *data = dev_get_drvdata(dev); + + dev_dbg(dev, "suspend\n"); + if (is_sysmmu_active(data)) { + __sysmmu_disable_nocount(data); + pm_runtime_put(dev); + } + return 0; +} + +static int exynos_sysmmu_resume(struct device *dev) +{ + struct sysmmu_drvdata *data = dev_get_drvdata(dev); + + dev_dbg(dev, "resume\n"); + if (is_sysmmu_active(data)) { + pm_runtime_get_sync(dev); + __sysmmu_enable_nocount(data); + } + return 0; +} +#endif + +static const struct dev_pm_ops sysmmu_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(exynos_sysmmu_suspend, exynos_sysmmu_resume) +}; + static const struct of_device_id sysmmu_of_match[] __initconst = { { .compatible = "samsung,exynos-sysmmu", }, { }, @@ -611,6 +641,7 @@ static struct platform_driver exynos_sysmmu_driver __refdata = { .driver = { .name = "exynos-sysmmu", .of_match_table = sysmmu_of_match, + .pm = &sysmmu_pm_ops, } }; |