Runtime power management by exynos-iommu driver independently from
master H/W's runtime pm is not useful for power saving since attaching
master H/W in probing time turns on its local power endlessly.
Thus this removes runtime pm API calls.
Runtime PM support is added in the following commits to exynos-iommu
driver.
Signed-off-by: Cho KyongHo <pullip.cho@xxxxxxxxxxx>
---
drivers/iommu/exynos-iommu.c | 20 --------------------
1 files changed, 0 insertions(+), 20 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index e8f3e82..686e3c8 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -491,15 +491,8 @@ int exynos_sysmmu_enable(struct device *dev, unsigned long pgtable)
BUG_ON(!memblock_is_memory(pgtable));
- ret = pm_runtime_get_sync(data->sysmmu);
- if (ret < 0) {
- dev_dbg(data->sysmmu, "Failed to enable\n");
- return ret;
- }
-
ret = __exynos_sysmmu_enable(data, pgtable, NULL);
if (WARN_ON(ret < 0)) {
- pm_runtime_put(data->sysmmu);
dev_err(data->sysmmu,
"Already enabled with page table %#lx\n",
data->pgtable);
@@ -516,7 +509,6 @@ static bool exynos_sysmmu_disable(struct device *dev)
bool disabled;
disabled = __exynos_sysmmu_disable(data);
- pm_runtime_put(data->sysmmu);
return disabled;
}
@@ -626,8 +618,6 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev)
}
}
- pm_runtime_enable(dev);
-
data->sysmmu = dev;
data->clk = devm_clk_get(dev, "sysmmu");
if (IS_ERR(data->clk)) {
@@ -759,12 +749,6 @@ static int exynos_iommu_attach_device(struct iommu_domain *domain,
unsigned long flags;
int ret;
- ret = pm_runtime_get_sync(data->sysmmu);
- if (ret < 0)
- return ret;
-
- ret = 0;
-
spin_lock_irqsave(&priv->lock, flags);
ret = __exynos_sysmmu_enable(data, __pa(priv->pgtable), domain);
@@ -781,7 +765,6 @@ static int exynos_iommu_attach_device(struct iommu_domain *domain,
if (ret < 0) {
dev_err(dev, "%s: Failed to attach IOMMU with pgtable %#lx\n",
__func__, __pa(priv->pgtable));
- pm_runtime_put(data->sysmmu);
} else if (ret > 0) {
dev_dbg(dev, "%s: IOMMU with pgtable 0x%lx already attached\n",
__func__, __pa(priv->pgtable));
@@ -826,9 +809,6 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain,
finish:
spin_unlock_irqrestore(&priv->lock, flags);
-
- if (found)
- pm_runtime_put(data->sysmmu);
}
static unsigned long *alloc_lv2entry(unsigned long *sent, unsigned long iova,
--
1.7.2.5
--
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