Patchwork [v19,3/5] iommu/arm-smmu: Add the device_link between masters and smmu

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Submitter Vivek Gautam
Date Dec. 4, 2018, 6:22 a.m.
Message ID <20181204062213.6875-4-vivek.gautam@codeaurora.org>
Download mbox | patch
Permalink /patch/671603/
State New
Headers show

Comments

Vivek Gautam - Dec. 4, 2018, 6:22 a.m.
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>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
---

Changes since v18:
 None.

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

Patch

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 1917d214c4d9..b6b11642b3a9 100644
--- 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: