1 files changed, 80 insertions, 94 deletions

diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index b86acbc74cf0..e6472658235d 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -31,6 +31,7 @@ DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator");
  * @base:	memory mapped base address for this component. Also indicates
  *		whether this one is programmable or not.
  * @atclk:	optional clock for the core parts of the replicator.
+ * @pclk:	APB clock if present, otherwise NULL
  * @csdev:	component vitals needed by the framework
  * @spinlock:	serialize enable/disable operations.
  * @check_idfilter_val: check if the context is lost upon clock removal.
@@ -38,8 +39,9 @@ DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator");
 struct replicator_drvdata {
 	void __iomem		*base;
 	struct clk		*atclk;
+	struct clk		*pclk;
 	struct coresight_device	*csdev;
-	spinlock_t		spinlock;
+	raw_spinlock_t		spinlock;
 	bool			check_idfilter_val;
 };
 
@@ -61,7 +63,7 @@ static void dynamic_replicator_reset(struct replicator_drvdata *drvdata)
 /*
  * replicator_reset : Reset the replicator configuration to sane values.
  */
-static inline void replicator_reset(struct replicator_drvdata *drvdata)
+static void replicator_reset(struct replicator_drvdata *drvdata)
 {
 	if (drvdata->base)
 		dynamic_replicator_reset(drvdata);
@@ -114,25 +116,26 @@ static int dynamic_replicator_enable(struct replicator_drvdata *drvdata,
 	return rc;
 }
 
-static int replicator_enable(struct coresight_device *csdev, int inport,
-			     int outport)
+static int replicator_enable(struct coresight_device *csdev,
+			     struct coresight_connection *in,
+			     struct coresight_connection *out)
 {
 	int rc = 0;
 	struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
 	unsigned long flags;
 	bool first_enable = false;
 
-	spin_lock_irqsave(&drvdata->spinlock, flags);
-	if (atomic_read(&csdev->refcnt[outport]) == 0) {
+	raw_spin_lock_irqsave(&drvdata->spinlock, flags);
+	if (out->src_refcnt == 0) {
 		if (drvdata->base)
-			rc = dynamic_replicator_enable(drvdata, inport,
-						       outport);
+			rc = dynamic_replicator_enable(drvdata, in->dest_port,
+						       out->src_port);
 		if (!rc)
 			first_enable = true;
 	}
 	if (!rc)
-		atomic_inc(&csdev->refcnt[outport]);
-	spin_unlock_irqrestore(&drvdata->spinlock, flags);
+		out->src_refcnt++;
+	raw_spin_unlock_irqrestore(&drvdata->spinlock, flags);
 
 	if (first_enable)
 		dev_dbg(&csdev->dev, "REPLICATOR enabled\n");
@@ -168,20 +171,22 @@ static void dynamic_replicator_disable(struct replicator_drvdata *drvdata,
 	CS_LOCK(drvdata->base);
 }
 
-static void replicator_disable(struct coresight_device *csdev, int inport,
-			       int outport)
+static void replicator_disable(struct coresight_device *csdev,
+			       struct coresight_connection *in,
+			       struct coresight_connection *out)
 {
 	struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
 	unsigned long flags;
 	bool last_disable = false;
 
-	spin_lock_irqsave(&drvdata->spinlock, flags);
-	if (atomic_dec_return(&csdev->refcnt[outport]) == 0) {
+	raw_spin_lock_irqsave(&drvdata->spinlock, flags);
+	if (--out->src_refcnt == 0) {
 		if (drvdata->base)
-			dynamic_replicator_disable(drvdata, inport, outport);
+			dynamic_replicator_disable(drvdata, in->dest_port,
+						   out->src_port);
 		last_disable = true;
 	}
-	spin_unlock_irqrestore(&drvdata->spinlock, flags);
+	raw_spin_unlock_irqrestore(&drvdata->spinlock, flags);
 
 	if (last_disable)
 		dev_dbg(&csdev->dev, "REPLICATOR disabled\n");
@@ -196,15 +201,9 @@ static const struct coresight_ops replicator_cs_ops = {
 	.link_ops	= &replicator_link_ops,
 };
 
-#define coresight_replicator_reg(name, offset) \
-	coresight_simple_reg32(struct replicator_drvdata, name, offset)
-
-coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0);
-coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1);
-
 static struct attribute *replicator_mgmt_attrs[] = {
-	&dev_attr_idfilter0.attr,
-	&dev_attr_idfilter1.attr,
+	coresight_simple_reg32(idfilter0, REPLICATOR_IDFILTER0),
+	coresight_simple_reg32(idfilter1, REPLICATOR_IDFILTER1),
 	NULL,
 };
 
@@ -220,11 +219,11 @@ static const struct attribute_group *replicator_groups[] = {
 
 static int replicator_probe(struct device *dev, struct resource *res)
 {
-	int ret = 0;
 	struct coresight_platform_data *pdata = NULL;
 	struct replicator_drvdata *drvdata;
 	struct coresight_desc desc = { 0 };
 	void __iomem *base;
+	int ret;
 
 	if (is_of_node(dev_fwnode(dev)) &&
 	    of_device_is_compatible(dev->of_node, "arm,coresight-replicator"))
@@ -239,12 +238,9 @@ static int replicator_probe(struct device *dev, struct resource *res)
 	if (!drvdata)
 		return -ENOMEM;
 
-	drvdata->atclk = devm_clk_get(dev, "atclk"); /* optional */
-	if (!IS_ERR(drvdata->atclk)) {
-		ret = clk_prepare_enable(drvdata->atclk);
-		if (ret)
-			return ret;
-	}
+	ret = coresight_get_enable_clocks(dev, &drvdata->pclk, &drvdata->atclk);
+	if (ret)
+		return ret;
 
 	/*
 	 * Map the device base for dynamic-replicator, which has been
@@ -252,13 +248,12 @@ static int replicator_probe(struct device *dev, struct resource *res)
 	 */
 	if (res) {
 		base = devm_ioremap_resource(dev, res);
-		if (IS_ERR(base)) {
-			ret = PTR_ERR(base);
-			goto out_disable_clk;
-		}
+		if (IS_ERR(base))
+			return PTR_ERR(base);
 		drvdata->base = base;
 		desc.groups = replicator_groups;
 		desc.access = CSDEV_ACCESS_IOMEM(base);
+		coresight_clear_self_claim_tag(&desc.access);
 	}
 
 	if (fwnode_property_present(dev_fwnode(dev),
@@ -268,13 +263,11 @@ static int replicator_probe(struct device *dev, struct resource *res)
 	dev_set_drvdata(dev, drvdata);
 
 	pdata = coresight_get_platform_data(dev);
-	if (IS_ERR(pdata)) {
-		ret = PTR_ERR(pdata);
-		goto out_disable_clk;
-	}
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
 	dev->platform_data = pdata;
 
-	spin_lock_init(&drvdata->spinlock);
+	raw_spin_lock_init(&drvdata->spinlock);
 	desc.type = CORESIGHT_DEV_TYPE_LINK;
 	desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
 	desc.ops = &replicator_cs_ops;
@@ -282,18 +275,11 @@ static int replicator_probe(struct device *dev, struct resource *res)
 	desc.dev = dev;
 
 	drvdata->csdev = coresight_register(&desc);
-	if (IS_ERR(drvdata->csdev)) {
-		ret = PTR_ERR(drvdata->csdev);
-		goto out_disable_clk;
-	}
+	if (IS_ERR(drvdata->csdev))
+		return PTR_ERR(drvdata->csdev);
 
 	replicator_reset(drvdata);
-	pm_runtime_put(dev);
-
-out_disable_clk:
-	if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
-		clk_disable_unprepare(drvdata->atclk);
-	return ret;
+	return 0;
 }
 
 static int replicator_remove(struct device *dev)
@@ -304,30 +290,32 @@ static int replicator_remove(struct device *dev)
 	return 0;
 }
 
-static int static_replicator_probe(struct platform_device *pdev)
+static int replicator_platform_probe(struct platform_device *pdev)
 {
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	int ret;
 
 	pm_runtime_get_noresume(&pdev->dev);
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
 
-	/* Static replicators do not have programming base */
-	ret = replicator_probe(&pdev->dev, NULL);
-
-	if (ret) {
-		pm_runtime_put_noidle(&pdev->dev);
+	ret = replicator_probe(&pdev->dev, res);
+	pm_runtime_put(&pdev->dev);
+	if (ret)
 		pm_runtime_disable(&pdev->dev);
-	}
 
 	return ret;
 }
 
-static int static_replicator_remove(struct platform_device *pdev)
+static void replicator_platform_remove(struct platform_device *pdev)
 {
+	struct replicator_drvdata *drvdata = dev_get_drvdata(&pdev->dev);
+
+	if (WARN_ON(!drvdata))
+		return;
+
 	replicator_remove(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -335,8 +323,8 @@ static int replicator_runtime_suspend(struct device *dev)
 {
 	struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
 
-	if (drvdata && !IS_ERR(drvdata->atclk))
-		clk_disable_unprepare(drvdata->atclk);
+	clk_disable_unprepare(drvdata->atclk);
+	clk_disable_unprepare(drvdata->pclk);
 
 	return 0;
 }
@@ -344,11 +332,17 @@ static int replicator_runtime_suspend(struct device *dev)
 static int replicator_runtime_resume(struct device *dev)
 {
 	struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
+	int ret;
 
-	if (drvdata && !IS_ERR(drvdata->atclk))
-		clk_prepare_enable(drvdata->atclk);
+	ret = clk_prepare_enable(drvdata->pclk);
+	if (ret)
+		return ret;
 
-	return 0;
+	ret = clk_prepare_enable(drvdata->atclk);
+	if (ret)
+		clk_disable_unprepare(drvdata->pclk);
+
+	return ret;
 }
 #endif
 
@@ -357,31 +351,32 @@ static const struct dev_pm_ops replicator_dev_pm_ops = {
 			   replicator_runtime_resume, NULL)
 };
 
-static const struct of_device_id static_replicator_match[] = {
+static const struct of_device_id replicator_match[] = {
 	{.compatible = "arm,coresight-replicator"},
 	{.compatible = "arm,coresight-static-replicator"},
 	{}
 };
 
-MODULE_DEVICE_TABLE(of, static_replicator_match);
+MODULE_DEVICE_TABLE(of, replicator_match);
 
 #ifdef CONFIG_ACPI
-static const struct acpi_device_id static_replicator_acpi_ids[] = {
-	{"ARMHC985", 0}, /* ARM CoreSight Static Replicator */
+static const struct acpi_device_id replicator_acpi_ids[] = {
+	{"ARMHC985", 0, 0, 0}, /* ARM CoreSight Static Replicator */
+	{"ARMHC98D", 0, 0, 0}, /* ARM CoreSight Dynamic Replicator */
 	{}
 };
 
-MODULE_DEVICE_TABLE(acpi, static_replicator_acpi_ids);
+MODULE_DEVICE_TABLE(acpi, replicator_acpi_ids);
 #endif
 
-static struct platform_driver static_replicator_driver = {
-	.probe          = static_replicator_probe,
-	.remove         = static_replicator_remove,
+static struct platform_driver replicator_driver = {
+	.probe          = replicator_platform_probe,
+	.remove         = replicator_platform_remove,
 	.driver         = {
-		.name   = "coresight-static-replicator",
+		.name   = "coresight-replicator",
 		/* THIS_MODULE is taken care of by platform_driver_register() */
-		.of_match_table = of_match_ptr(static_replicator_match),
-		.acpi_match_table = ACPI_PTR(static_replicator_acpi_ids),
+		.of_match_table = of_match_ptr(replicator_match),
+		.acpi_match_table = ACPI_PTR(replicator_acpi_ids),
 		.pm	= &replicator_dev_pm_ops,
 		.suppress_bind_attrs = true,
 	},
@@ -390,7 +385,13 @@ static struct platform_driver static_replicator_driver = {
 static int dynamic_replicator_probe(struct amba_device *adev,
 				    const struct amba_id *id)
 {
-	return replicator_probe(&adev->dev, &adev->res);
+	int ret;
+
+	ret = replicator_probe(&adev->dev, &adev->res);
+	if (!ret)
+		pm_runtime_put(&adev->dev);
+
+	return ret;
 }
 
 static void dynamic_replicator_remove(struct amba_device *adev)
@@ -410,7 +411,6 @@ static struct amba_driver dynamic_replicator_driver = {
 	.drv = {
 		.name	= "coresight-dynamic-replicator",
 		.pm	= &replicator_dev_pm_ops,
-		.owner	= THIS_MODULE,
 		.suppress_bind_attrs = true,
 	},
 	.probe		= dynamic_replicator_probe,
@@ -420,27 +420,13 @@ static struct amba_driver dynamic_replicator_driver = {
 
 static int __init replicator_init(void)
 {
-	int ret;
-
-	ret = platform_driver_register(&static_replicator_driver);
-	if (ret) {
-		pr_info("Error registering platform driver\n");
-		return ret;
-	}
-
-	ret = amba_driver_register(&dynamic_replicator_driver);
-	if (ret) {
-		pr_info("Error registering amba driver\n");
-		platform_driver_unregister(&static_replicator_driver);
-	}
-
-	return ret;
+	return coresight_init_driver("replicator", &dynamic_replicator_driver, &replicator_driver,
+				     THIS_MODULE);
 }
 
 static void __exit replicator_exit(void)
 {
-	platform_driver_unregister(&static_replicator_driver);
-	amba_driver_unregister(&dynamic_replicator_driver);
+	coresight_remove_driver(&dynamic_replicator_driver, &replicator_driver);
 }
 
 module_init(replicator_init);