The device link between master and its smmu is added so that
the smmu gets runtime enabled/disabled when the master needs it.
This is done from add_device callback which gets called once
when the master is added to the smmu group.
Signed-off-by: Sricharan R <sricha...@codeaurora.org>
---
drivers/iommu/arm-smmu.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 578cdc2..71ce4b6 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1470,6 +1470,15 @@ static int arm_smmu_add_device(struct device *dev)
goto out_free;
pm_runtime_put_sync(smmu->dev);
+ /*
+ * Establish the link between smmu and master, so that the
+ * smmu gets runtime enabled/disabled as per the master's
+ * needs.
+ */
+
+ device_link_add(dev, smmu->dev, DEVICE_LINK_AVAILABLE,
+ DEVICE_LINK_PM_RUNTIME);
+
return 0;
out_free:
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of
Code Aurora Forum, hosted by The Linux Foundation
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