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From: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
To: will.deacon-5wv7dgnIgG8@public.gmane.org,
	joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: [PATCH 2/2] iommu/arm-smmu: Add system PM support
Date: Tue, 18 Jul 2017 13:44:42 +0100	[thread overview]
Message-ID: <d8d6f3b606ed05d53b47d36e1c6a7f4b74eb3afc.1500381551.git.robin.murphy@arm.com> (raw)
In-Reply-To: <71247263f4d88e7776f483fb1cc1139b516c0835.1500381551.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>

With all our hardware state tracked in such a way that we can naturally
restore it as part of the necessary reset, resuming is trivial, and
there's nothing to do on suspend at all.

Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
 drivers/iommu/arm-smmu.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 86897b7b81d8..0f5f06e9abfa 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -2356,10 +2356,22 @@ static int arm_smmu_device_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int __maybe_unused arm_smmu_pm_resume(struct device *dev)
+{
+	struct arm_smmu_device *smmu = dev_get_drvdata(dev);
+
+	arm_smmu_device_reset(smmu);
+	return 0;
+}
+
+
+static SIMPLE_DEV_PM_OPS(arm_smmu_pm_ops, NULL, arm_smmu_pm_resume);
+
 static struct platform_driver arm_smmu_driver = {
 	.driver	= {
 		.name		= "arm-smmu",
 		.of_match_table	= of_match_ptr(arm_smmu_of_match),
+		.pm = &arm_smmu_pm_ops,
 	},
 	.probe	= arm_smmu_device_probe,
 	.remove	= arm_smmu_device_remove,
-- 
2.12.2.dirty

WARNING: multiple messages have this Message-ID (diff)
From: robin.murphy@arm.com (Robin Murphy)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] iommu/arm-smmu: Add system PM support
Date: Tue, 18 Jul 2017 13:44:42 +0100	[thread overview]
Message-ID: <d8d6f3b606ed05d53b47d36e1c6a7f4b74eb3afc.1500381551.git.robin.murphy@arm.com> (raw)
In-Reply-To: <71247263f4d88e7776f483fb1cc1139b516c0835.1500381551.git.robin.murphy@arm.com>

With all our hardware state tracked in such a way that we can naturally
restore it as part of the necessary reset, resuming is trivial, and
there's nothing to do on suspend at all.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
 drivers/iommu/arm-smmu.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 86897b7b81d8..0f5f06e9abfa 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -2356,10 +2356,22 @@ static int arm_smmu_device_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int __maybe_unused arm_smmu_pm_resume(struct device *dev)
+{
+	struct arm_smmu_device *smmu = dev_get_drvdata(dev);
+
+	arm_smmu_device_reset(smmu);
+	return 0;
+}
+
+
+static SIMPLE_DEV_PM_OPS(arm_smmu_pm_ops, NULL, arm_smmu_pm_resume);
+
 static struct platform_driver arm_smmu_driver = {
 	.driver	= {
 		.name		= "arm-smmu",
 		.of_match_table	= of_match_ptr(arm_smmu_of_match),
+		.pm = &arm_smmu_pm_ops,
 	},
 	.probe	= arm_smmu_device_probe,
 	.remove	= arm_smmu_device_remove,
-- 
2.12.2.dirty

  parent reply	other threads:[~2017-07-18 12:44 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-18 12:44 [PATCH 1/2] iommu/arm-smmu: Track context bank state Robin Murphy
2017-07-18 12:44 ` Robin Murphy
     [not found] ` <71247263f4d88e7776f483fb1cc1139b516c0835.1500381551.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2017-07-18 12:44   ` Robin Murphy [this message]
2017-07-18 12:44     ` [PATCH 2/2] iommu/arm-smmu: Add system PM support Robin Murphy
     [not found]     ` <d8d6f3b606ed05d53b47d36e1c6a7f4b74eb3afc.1500381551.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2017-08-08 11:18       ` Will Deacon
2017-08-08 11:18         ` Will Deacon
2017-08-08 12:14         ` Robin Murphy
2017-08-08 12:14           ` Robin Murphy
     [not found]           ` <7d0d846b-8ada-6514-ec27-22f4d8487014-5wv7dgnIgG8@public.gmane.org>
2017-08-11 10:04             ` Jonathan Cameron
2017-08-11 10:04               ` Jonathan Cameron
2017-07-19  2:40   ` [PATCH 1/2] iommu/arm-smmu: Track context bank state Sricharan R
2017-07-19  2:40     ` Sricharan R
     [not found]     ` <22b7eea9-d194-d768-a10f-fc3c6fec9e4c-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-07-19 10:17       ` Robin Murphy
2017-07-19 10:17         ` Robin Murphy
2017-08-08 11:11   ` Will Deacon
2017-08-08 11:11     ` Will Deacon
     [not found]     ` <20170808111151.GC13355-5wv7dgnIgG8@public.gmane.org>
2017-08-08 12:06       ` Robin Murphy
2017-08-08 12:06         ` Robin Murphy

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