From: Janghyuck Kim <janghyuck.kim@samsung.com>
Date: Mon, 25 Apr 2016 09:27:20 +0000 (+0900)
Subject: [COMMON] iommu/exynos: runtime suspend/resume callback
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f231c2313712ae6aa34499bb6c7aed290e25fffa;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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

Sysmmu operation is implicitly enabled and disabled when master device
turned on the power and off the power.

This patch replaces runtime pm suspend/resume callback of platform bus
with exynos_iommu_runtime_suspend/resume that added sysmmu handling.

Change-Id: I5e5e1f5fb485a9943c84c0e6a379b8720de57094
Signed-off-by: Janghyuck Kim <janghyuck.kim@samsung.com>
---

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index aba7bfc69d25..ef9794fa5d69 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -426,7 +426,35 @@ static int exynos_sysmmu_resume(struct device *dev)
 }
 #endif
 
+int exynos_iommu_runtime_suspend(struct device *sysmmu)
+{
+	unsigned long flags;
+	struct sysmmu_drvdata *drvdata = dev_get_drvdata(sysmmu);
+
+	spin_lock_irqsave(&drvdata->lock, flags);
+	if (put_sysmmu_runtime_active(drvdata) && is_sysmmu_active(drvdata))
+		__sysmmu_disable_nocount(drvdata);
+	spin_unlock_irqrestore(&drvdata->lock, flags);
+
+	return 0;
+}
+
+int exynos_iommu_runtime_resume(struct device *sysmmu)
+{
+	unsigned long flags;
+	struct sysmmu_drvdata *drvdata = dev_get_drvdata(sysmmu);
+
+	spin_lock_irqsave(&drvdata->lock, flags);
+	if (get_sysmmu_runtime_active(drvdata) && is_sysmmu_active(drvdata))
+		__sysmmu_enable_nocount(drvdata);
+	spin_unlock_irqrestore(&drvdata->lock, flags);
+
+	return 0;
+}
+
 static const struct dev_pm_ops sysmmu_pm_ops = {
+	SET_RUNTIME_PM_OPS(exynos_iommu_runtime_suspend,
+				exynos_iommu_runtime_resume, NULL)
 	SET_LATE_SYSTEM_SLEEP_PM_OPS(exynos_sysmmu_suspend, exynos_sysmmu_resume)
 };