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[v14,3/4] iommu/arm-smmu: Add the device_link between masters and smmu

Message ID 20180727070224.23966-4-vivek.gautam@codeaurora.org (mailing list archive)
State Superseded, archived
Headers show
Series iommu/arm-smmu: Add runtime pm/sleep support | expand

Commit Message

Vivek Gautam July 27, 2018, 7:02 a.m. UTC 
From: Sricharan R <sricharan@codeaurora.org>

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>
---

Change since v13:
 - No change.

 drivers/iommu/arm-smmu.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 1efa5681b905..e558abf1ecfc 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1461,6 +1461,9 @@  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: