[PATCH 03/10] memory: tegra: Push suspend/resume into SoC drivers

[Thierry Reding]

From: Thierry Reding <treding at nvidia.com>

Continuing the scheme of unification, push suspend/resume callbacks into
per-SoC driver so that they can be properly parameterized.

While at it, also move the ->init() callback into the new tegra_mc_ops
structure to keep things clean.

Signed-off-by: Thierry Reding <treding at nvidia.com>
---
 drivers/memory/tegra/mc.c       | 24 ++++++++---------------
 drivers/memory/tegra/tegra186.c | 27 ++++++++++++++++++++++----
 drivers/memory/tegra/tegra20.c  | 34 ++++++++++++++++++++++++++++++++-
 include/soc/tegra/mc.h          |  9 +++++++--
 4 files changed, 71 insertions(+), 23 deletions(-)

diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index b7e104bf6614..2b21131d779c 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -829,8 +829,8 @@ static int tegra_mc_probe(struct platform_device *pdev)
 
 	mc->debugfs.root = debugfs_create_dir("mc", NULL);
 
-	if (mc->soc->init) {
-		err = mc->soc->init(mc);
+	if (mc->soc->ops && mc->soc->ops->init) {
+		err = mc->soc->ops->init(mc);
 		if (err < 0)
 			dev_err(&pdev->dev, "failed to initialize SoC driver: %d\n",
 				err);
@@ -867,30 +867,22 @@ static int tegra_mc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int tegra_mc_suspend(struct device *dev)
+static int __maybe_unused tegra_mc_suspend(struct device *dev)
 {
 	struct tegra_mc *mc = dev_get_drvdata(dev);
-	int err;
 
-	if (IS_ENABLED(CONFIG_TEGRA_IOMMU_GART) && mc->gart) {
-		err = tegra_gart_suspend(mc->gart);
-		if (err)
-			return err;
-	}
+	if (mc->soc->ops && mc->soc->ops->suspend)
+		return mc->soc->ops->suspend(mc);
 
 	return 0;
 }
 
-static int tegra_mc_resume(struct device *dev)
+static int __maybe_unused tegra_mc_resume(struct device *dev)
 {
 	struct tegra_mc *mc = dev_get_drvdata(dev);
-	int err;
 
-	if (IS_ENABLED(CONFIG_TEGRA_IOMMU_GART) && mc->gart) {
-		err = tegra_gart_resume(mc->gart);
-		if (err)
-			return err;
-	}
+	if (mc->soc->ops && mc->soc->ops->resume)
+		return mc->soc->ops->resume(mc);
 
 	return 0;
 }
diff --git a/drivers/memory/tegra/tegra186.c b/drivers/memory/tegra/tegra186.c
index 8e77567d1378..9d3fdb609d55 100644
--- a/drivers/memory/tegra/tegra186.c
+++ b/drivers/memory/tegra/tegra186.c
@@ -45,6 +45,17 @@ static void tegra186_mc_program_sid(struct tegra_mc *mc)
 	}
 }
 
+static int tegra186_mc_resume(struct tegra_mc *mc)
+{
+	tegra186_mc_program_sid(mc);
+
+	return 0;
+}
+
+static const struct tegra_mc_ops tegra186_mc_ops = {
+	.resume = tegra186_mc_resume,
+};
+
 #if defined(CONFIG_ARCH_TEGRA_186_SOC)
 static const struct tegra_mc_client tegra186_mc_clients[] = {
 	{
@@ -701,6 +712,7 @@ static const struct tegra_mc_client tegra186_mc_clients[] = {
 static const struct tegra_mc_soc tegra186_mc_soc = {
 	.num_clients = ARRAY_SIZE(tegra186_mc_clients),
 	.clients = tegra186_mc_clients,
+	.ops = &tegra186_mc_ops,
 };
 #endif
 
@@ -1909,6 +1921,7 @@ static const struct tegra_mc_client tegra194_mc_clients[] = {
 static const struct tegra_mc_soc tegra194_mc_soc = {
 	.num_clients = ARRAY_SIZE(tegra194_mc_clients),
 	.clients = tegra194_mc_clients,
+	.ops = &tegra186_mc_ops,
 };
 #endif
 
@@ -1961,22 +1974,28 @@ static const struct of_device_id tegra186_mc_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, tegra186_mc_of_match);
 
-static int __maybe_unused tegra186_mc_suspend(struct device *dev)
+static int __maybe_unused tegra_mc_suspend(struct device *dev)
 {
+	struct tegra_mc *mc = dev_get_drvdata(dev);
+
+	if (mc->soc->ops && mc->soc->ops->suspend)
+		return mc->soc->ops->suspend(mc);
+
 	return 0;
 }
 
-static int __maybe_unused tegra186_mc_resume(struct device *dev)
+static int __maybe_unused tegra_mc_resume(struct device *dev)
 {
 	struct tegra_mc *mc = dev_get_drvdata(dev);
 
-	tegra186_mc_program_sid(mc);
+	if (mc->soc->ops && mc->soc->ops->resume)
+		return mc->soc->ops->resume(mc);
 
 	return 0;
 }
 
 static const struct dev_pm_ops tegra186_mc_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(tegra186_mc_suspend, tegra186_mc_resume)
+	SET_SYSTEM_SLEEP_PM_OPS(tegra_mc_suspend, tegra_mc_resume)
 };
 
 static struct platform_driver tegra186_mc_driver = {
diff --git a/drivers/memory/tegra/tegra20.c b/drivers/memory/tegra/tegra20.c
index 2db68a913b7a..a3335ad20f4d 100644
--- a/drivers/memory/tegra/tegra20.c
+++ b/drivers/memory/tegra/tegra20.c
@@ -687,6 +687,38 @@ static int tegra20_mc_init(struct tegra_mc *mc)
 	return 0;
 }
 
+static int tegra20_mc_suspend(struct tegra_mc *mc)
+{
+	int err;
+
+	if (IS_ENABLED(CONFIG_TEGRA_IOMMU_GART) && mc->gart) {
+		err = tegra_gart_suspend(mc->gart);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+static int tegra20_mc_resume(struct tegra_mc *mc)
+{
+	int err;
+
+	if (IS_ENABLED(CONFIG_TEGRA_IOMMU_GART) && mc->gart) {
+		err = tegra_gart_resume(mc->gart);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+static const struct tegra_mc_ops tegra20_mc_ops = {
+	.init = tegra20_mc_init,
+	.suspend = tegra20_mc_suspend,
+	.resume = tegra20_mc_resume,
+};
+
 const struct tegra_mc_soc tegra20_mc_soc = {
 	.clients = tegra20_mc_clients,
 	.num_clients = ARRAY_SIZE(tegra20_mc_clients),
@@ -698,5 +730,5 @@ const struct tegra_mc_soc tegra20_mc_soc = {
 	.resets = tegra20_mc_resets,
 	.num_resets = ARRAY_SIZE(tegra20_mc_resets),
 	.icc_ops = &tegra20_mc_icc_ops,
-	.init = tegra20_mc_init,
+	.ops = &tegra20_mc_ops,
 };
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
index 9da4ef52ce30..7c49f75087c3 100644
--- a/include/soc/tegra/mc.h
+++ b/include/soc/tegra/mc.h
@@ -169,6 +169,12 @@ struct tegra_mc_icc_ops {
 						void *data);
 };
 
+struct tegra_mc_ops {
+	int (*init)(struct tegra_mc *mc);
+	int (*suspend)(struct tegra_mc *mc);
+	int (*resume)(struct tegra_mc *mc);
+};
+
 struct tegra_mc_soc {
 	const struct tegra_mc_client *clients;
 	unsigned int num_clients;
@@ -190,8 +196,7 @@ struct tegra_mc_soc {
 	unsigned int num_resets;
 
 	const struct tegra_mc_icc_ops *icc_ops;
-
-	int (*init)(struct tegra_mc *mc);
+	const struct tegra_mc_ops *ops;
 };
 
 struct tegra_mc {
-- 
2.30.2