From: Janghyuck Kim <janghyuck.kim@samsung.com>
Date: Mon, 25 Apr 2016 09:30:17 +0000 (+0900)
Subject: [COMMON] iommu/exynos: add suspend/resume callback
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7ce79ed5978e38aa1d4230612c1ae6506a013f56;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] iommu/exynos: add suspend/resume callback

To support suspend and resume of APM, suspend and resume callback is
added to disable and enable sysmmu properly.

Change-Id: Ie2cf804b50219c1c820de794fe2e6aad68ae3d94
Signed-off-by: Janghyuck Kim <janghyuck.kim@samsung.com>
---

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index ef9794fa5d69..ce66ac41f5e6 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -417,11 +417,32 @@ static int sysmmu_enable_from_master(struct device *master,
 #ifdef CONFIG_PM_SLEEP
 static int exynos_sysmmu_suspend(struct device *dev)
 {
+	unsigned long flags;
+	struct sysmmu_drvdata *drvdata = dev_get_drvdata(dev);
+
+	spin_lock_irqsave(&drvdata->lock, flags);
+	if (is_sysmmu_active(drvdata) &&
+			(!pm_runtime_enabled(dev) ||
+			 is_sysmmu_runtime_active(drvdata))) {
+		__sysmmu_disable_nocount(drvdata);
+	}
+	spin_unlock_irqrestore(&drvdata->lock, flags);
+
 	return 0;
 }
 
 static int exynos_sysmmu_resume(struct device *dev)
 {
+	unsigned long flags;
+	struct sysmmu_drvdata *drvdata = dev_get_drvdata(dev);
+
+	spin_lock_irqsave(&drvdata->lock, flags);
+	if (is_sysmmu_active(drvdata) &&
+			(!pm_runtime_enabled(dev) ||
+			 is_sysmmu_runtime_active(drvdata)))
+		__sysmmu_enable_nocount(drvdata);
+	spin_unlock_irqrestore(&drvdata->lock, flags);
+
 	return 0;
 }
 #endif