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iommu/omap: Allow enable/disable even without pdata

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When booting with a devicetree, no platform data is provided.
Do not prematurely exit iommu_enable() and iommu_disable() in
such a case.

Note: As OMAP do not yet has a proper reset controller driver,
IOMMUs requiring a reset signal should use pdata-quirks as a
transitional solution.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Suman Anna <s-anna@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
This commit is contained in:
Florian Vaussard 2014-02-28 14:42:34 -06:00 committed by Joerg Roedel
parent 7ee08b9ef2
commit 90e569c4ca
1 changed files with 2 additions and 8 deletions
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10
drivers/iommu/omap-iommu.c
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@ -146,13 +146,10 @@ static int iommu_enable(struct omap_iommu *obj)
struct platform_device *pdev = to_platform_device(obj->dev);
struct iommu_platform_data *pdata = pdev->dev.platform_data;
if (!pdata)
return -EINVAL;
if (!arch_iommu)
return -ENODEV;
if (pdata->deassert_reset) {
if (pdata && pdata->deassert_reset) {
err = pdata->deassert_reset(pdev, pdata->reset_name);
if (err) {
dev_err(obj->dev, "deassert_reset failed: %d\n", err);
@ -172,14 +169,11 @@ static void iommu_disable(struct omap_iommu *obj)
struct platform_device *pdev = to_platform_device(obj->dev);
struct iommu_platform_data *pdata = pdev->dev.platform_data;
if (!pdata)
return;
arch_iommu->disable(obj);
pm_runtime_put_sync(obj->dev);
if (pdata->assert_reset)
if (pdata && pdata->assert_reset)
pdata->assert_reset(pdev, pdata->reset_name);
}