From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: Wed, 22 Apr 2015 13:34:43 +0000 (+0200)
Subject: iommu: exynos: add system suspend/resume support
X-Git-Tag: submit/tizen/20150512.061825~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=02b73fe4c6af4809353077ccbce2bcfa3d34277d;p=platform%2Fkernel%2Flinux-exynos.git

iommu: exynos: add system suspend/resume support

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index a361cc89bb84..0c4e8fcca334 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -600,6 +600,32 @@ 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);
+	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))
+		__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", },
 	{ },
@@ -610,6 +636,7 @@ static struct platform_driver exynos_sysmmu_driver __refdata = {
 	.driver	= {
 		.name		= "exynos-sysmmu",
 		.of_match_table	= sysmmu_of_match,
+		.pm		= &sysmmu_pm_ops,
 	}
 };