iommu/arm-smmu: Add the device_link between masters and smmu

Finally add the device link between the master device and
smmu, so that the smmu gets runtime enabled/disabled only when the
master needs it. This is done from add_device callback which gets
called once when the master is added to the smmu.

Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 1917d214c4d94388e434aed33870255b5faa2ee1..b6b11642b3a97fff874a1207aa0279be5a94af13 100644 (file)
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1500,6 +1500,9 @@ static int arm_smmu_add_device(struct device *dev)
 
        iommu_device_link(&smmu->iommu, dev);
 
+       device_link_add(dev, smmu->dev,
+                       DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER);
+
        return 0;
 
 out_cfg_free: