diff options
Diffstat (limited to 'drivers/iommu/omap-iommu.c')
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 7640f2bd7c81..ef62ac9057bb 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -65,6 +65,9 @@ static struct omap_iommu_domain *to_omap_domain(struct iommu_domain *dom) /** * omap_iommu_save_ctx - Save registers for pm off-mode support * @dev: client device + * + * This should be treated as an deprecated API. It is preserved only + * to maintain existing functionality for OMAP3 ISP driver. **/ void omap_iommu_save_ctx(struct device *dev) { @@ -92,6 +95,9 @@ EXPORT_SYMBOL_GPL(omap_iommu_save_ctx); /** * omap_iommu_restore_ctx - Restore registers for pm off-mode support * @dev: client device + * + * This should be treated as an deprecated API. It is preserved only + * to maintain existing functionality for OMAP3 ISP driver. **/ void omap_iommu_restore_ctx(struct device *dev) { @@ -1021,6 +1027,23 @@ static int omap_iommu_runtime_resume(struct device *dev) return ret; } +/** + * omap_iommu_suspend_prepare - prepare() dev_pm_ops implementation + * @dev: iommu device + * + * This function performs the necessary checks to determine if the IOMMU + * device needs suspending or not. The function checks if the runtime_pm + * status of the device is suspended, and returns 1 in that case. This + * results in the PM core to skip invoking any of the Sleep PM callbacks + * (suspend, suspend_late, resume, resume_early etc). + */ +static int omap_iommu_prepare(struct device *dev) +{ + if (pm_runtime_status_suspended(dev)) + return 1; + return 0; +} + static bool omap_iommu_can_register(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -1198,6 +1221,9 @@ static int omap_iommu_remove(struct platform_device *pdev) } static const struct dev_pm_ops omap_iommu_pm_ops = { + .prepare = omap_iommu_prepare, + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) SET_RUNTIME_PM_OPS(omap_iommu_runtime_suspend, omap_iommu_runtime_resume, NULL) }; |