[PATCH v3 11/20] iommu/fsl_pamu: Add set_platform_dma callback

[Lu Baolu]

This IOMMU driver doesn't support default domain. Add the implementation
of set_platform_dma callback so that the IOMMU core could return the
DMA control.

Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
---
 drivers/iommu/fsl_pamu_domain.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 4408ac3c49b6..b8c716e7c424 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -314,6 +314,14 @@ static void fsl_pamu_detach_device(struct iommu_domain *domain,
 		pr_debug("missing fsl,liodn property at %pOF\n", dev->of_node);
 }
 
+static void fsl_pamu_set_platform_dma(struct device *dev)
+{
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
+
+	if (domain)
+		fsl_pamu_detach_device(domain, dev);
+}
+
 /* Set the domain stash attribute */
 int fsl_pamu_configure_l1_stash(struct iommu_domain *domain, u32 cpu)
 {
@@ -452,6 +460,7 @@ static const struct iommu_ops fsl_pamu_ops = {
 	.domain_alloc	= fsl_pamu_domain_alloc,
 	.probe_device	= fsl_pamu_probe_device,
 	.device_group   = fsl_pamu_device_group,
+	.set_platform_dma = fsl_pamu_set_platform_dma;
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= fsl_pamu_attach_device,
 		.detach_dev	= fsl_pamu_detach_device,
-- 
2.34.1