summaryrefslogtreecommitdiffstats
path: root/drivers/hwtracing
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-tpiu.c21
1 files changed, 4 insertions, 17 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
index 88b6b0c32538..688ba937069e 100644
--- a/drivers/hwtracing/coresight/coresight-tpiu.c
+++ b/drivers/hwtracing/coresight/coresight-tpiu.c
@@ -17,7 +17,7 @@
#include <linux/io.h>
#include <linux/err.h>
#include <linux/slab.h>
-#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/coresight.h>
#include <linux/amba/bus.h>
@@ -51,13 +51,11 @@
* @base: memory mapped base address for this component.
* @dev: the device entity associated to this component.
* @csdev: component vitals needed by the framework.
- * @clk: the clock this component is associated to.
*/
struct tpiu_drvdata {
void __iomem *base;
struct device *dev;
struct coresight_device *csdev;
- struct clk *clk;
};
static void tpiu_enable_hw(struct tpiu_drvdata *drvdata)
@@ -72,12 +70,8 @@ static void tpiu_enable_hw(struct tpiu_drvdata *drvdata)
static int tpiu_enable(struct coresight_device *csdev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
- int ret;
-
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
+ pm_runtime_get_sync(csdev->dev.parent);
tpiu_enable_hw(drvdata);
dev_info(drvdata->dev, "TPIU enabled\n");
@@ -101,8 +95,7 @@ static void tpiu_disable(struct coresight_device *csdev)
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
tpiu_disable_hw(drvdata);
-
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(csdev->dev.parent);
dev_info(drvdata->dev, "TPIU disabled\n");
}
@@ -118,7 +111,6 @@ static const struct coresight_ops tpiu_cs_ops = {
static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
{
- int ret;
void __iomem *base;
struct device *dev = &adev->dev;
struct coresight_platform_data *pdata = NULL;
@@ -148,15 +140,10 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
drvdata->base = base;
- drvdata->clk = adev->pclk;
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
-
/* Disable tpiu to support older devices */
tpiu_disable_hw(drvdata);
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(&adev->dev);
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)