linux-kernel - [PATCH 2/7] coresight: etm4x: Drop iomem 'base' argument from etm4

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Date:   Fri, 17 Mar 2023 08:34:56 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
        suzuki.poulose@....com
Cc:     scclevenger@...amperecomputing.com,
        Anshuman Khandual <anshuman.khandual@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>, devicetree@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/7] coresight: etm4x: Drop iomem 'base' argument from etm4_probe()

'struct etm4_drvdata' itself can carry the base address before etm4_probe()
gets called. Just drop that redundant argument from etm4_probe().

Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: Suzuki K Poulose <suzuki.poulose@....com>
Cc: Mike Leach <mike.leach@...aro.org>
Cc: Leo Yan <leo.yan@...aro.org>
Cc: coresight@...ts.linaro.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 drivers/hwtracing/coresight/coresight-etm4x-core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 10119c223fbe..5d77571a8df9 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -2048,7 +2048,7 @@ static int etm4_add_coresight_dev(struct etm4_init_arg *init_arg)
 	return 0;
 }
 
-static int etm4_probe(struct device *dev, void __iomem *base, u32 etm_pid)
+static int etm4_probe(struct device *dev, u32 etm_pid)
 {
 	struct etmv4_drvdata *drvdata = dev_get_drvdata(dev);
 	struct csdev_access access = { 0 };
@@ -2069,8 +2069,6 @@ static int etm4_probe(struct device *dev, void __iomem *base, u32 etm_pid)
 			return -ENOMEM;
 	}
 
-	drvdata->base = base;
-
 	spin_lock_init(&drvdata->spinlock);
 
 	drvdata->cpu = coresight_get_cpu(dev);
@@ -2124,8 +2122,9 @@ static int etm4_probe_amba(struct amba_device *adev, const struct amba_id *id)
 	if (!drvdata)
 		return -ENOMEM;
 
+	drvdata->base = base;
 	dev_set_drvdata(dev, drvdata);
-	ret = etm4_probe(dev, base, id->id);
+	ret = etm4_probe(dev, id->id);
 	if (!ret)
 		pm_runtime_put(&adev->dev);
 
@@ -2141,6 +2140,7 @@ static int etm4_probe_platform_dev(struct platform_device *pdev)
 	if (!drvdata)
 		return -ENOMEM;
 
+	drvdata->base = NULL;
 	dev_set_drvdata(&pdev->dev, drvdata);
 	pm_runtime_get_noresume(&pdev->dev);
 	pm_runtime_set_active(&pdev->dev);
@@ -2151,7 +2151,7 @@ static int etm4_probe_platform_dev(struct platform_device *pdev)
 	 * HW by reading appropriate registers on the HW
 	 * and thus we could skip the PID.
 	 */
-	ret = etm4_probe(&pdev->dev, NULL, 0);
+	ret = etm4_probe(&pdev->dev, 0);
 
 	pm_runtime_put(&pdev->dev);
 	return ret;
-- 
2.25.1