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path: root/drivers/hwtracing
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-rw-r--r--drivers/hwtracing/coresight/coresight-etm.h2
-rw-r--r--drivers/hwtracing/coresight/coresight-etm3x.c60
2 files changed, 16 insertions, 46 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm.h b/drivers/hwtracing/coresight/coresight-etm.h
index 501c5fac8a45..d1421e1f8b8a 100644
--- a/drivers/hwtracing/coresight/coresight-etm.h
+++ b/drivers/hwtracing/coresight/coresight-etm.h
@@ -141,7 +141,6 @@
* @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.
* @spinlock: only one at a time pls.
* @cpu: the cpu this component is affined to.
* @port_size: port size as reported by ETMCR bit 4-6 and 21.
@@ -193,7 +192,6 @@ struct etm_drvdata {
void __iomem *base;
struct device *dev;
struct coresight_device *csdev;
- struct clk *clk;
spinlock_t spinlock;
int cpu;
int port_size;
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index e8316d5aa459..7f0df778bd85 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -23,7 +23,7 @@
#include <linux/smp.h>
#include <linux/sysfs.h>
#include <linux/stat.h>
-#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/cpu.h>
#include <linux/of.h>
#include <linux/coresight.h>
@@ -325,9 +325,7 @@ static int etm_trace_id(struct coresight_device *csdev)
if (!drvdata->enable)
return drvdata->traceid;
-
- if (clk_prepare_enable(drvdata->clk))
- goto out;
+ pm_runtime_get_sync(csdev->dev.parent);
spin_lock_irqsave(&drvdata->spinlock, flags);
@@ -336,8 +334,8 @@ static int etm_trace_id(struct coresight_device *csdev)
CS_LOCK(drvdata->base);
spin_unlock_irqrestore(&drvdata->spinlock, flags);
- clk_disable_unprepare(drvdata->clk);
-out:
+ pm_runtime_put(csdev->dev.parent);
+
return trace_id;
}
@@ -346,10 +344,7 @@ static int etm_enable(struct coresight_device *csdev)
struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
int ret;
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- goto err_clk;
-
+ pm_runtime_get_sync(csdev->dev.parent);
spin_lock(&drvdata->spinlock);
/*
@@ -373,8 +368,7 @@ static int etm_enable(struct coresight_device *csdev)
return 0;
err:
spin_unlock(&drvdata->spinlock);
- clk_disable_unprepare(drvdata->clk);
-err_clk:
+ pm_runtime_put(csdev->dev.parent);
return ret;
}
@@ -423,8 +417,7 @@ static void etm_disable(struct coresight_device *csdev)
spin_unlock(&drvdata->spinlock);
put_online_cpus();
-
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(csdev->dev.parent);
dev_info(drvdata->dev, "ETM tracing disabled\n");
}
@@ -474,14 +467,10 @@ static DEVICE_ATTR_RO(nr_ctxid_cmp);
static ssize_t etmsr_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int ret;
unsigned long flags, val;
struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
-
+ pm_runtime_get_sync(drvdata->dev);
spin_lock_irqsave(&drvdata->spinlock, flags);
CS_UNLOCK(drvdata->base);
@@ -489,7 +478,7 @@ static ssize_t etmsr_show(struct device *dev,
CS_LOCK(drvdata->base);
spin_unlock_irqrestore(&drvdata->spinlock, flags);
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(drvdata->dev);
return sprintf(buf, "%#lx\n", val);
}
@@ -1317,7 +1306,6 @@ static DEVICE_ATTR_RW(seq_13_event);
static ssize_t seq_curr_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int ret;
unsigned long val, flags;
struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
@@ -1326,9 +1314,7 @@ static ssize_t seq_curr_state_show(struct device *dev,
goto out;
}
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
+ pm_runtime_get_sync(drvdata->dev);
spin_lock_irqsave(&drvdata->spinlock, flags);
@@ -1337,7 +1323,7 @@ static ssize_t seq_curr_state_show(struct device *dev,
CS_LOCK(drvdata->base);
spin_unlock_irqrestore(&drvdata->spinlock, flags);
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(drvdata->dev);
out:
return sprintf(buf, "%#lx\n", val);
}
@@ -1521,10 +1507,7 @@ static ssize_t status_show(struct device *dev,
unsigned long flags;
struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
-
+ pm_runtime_get_sync(drvdata->dev);
spin_lock_irqsave(&drvdata->spinlock, flags);
CS_UNLOCK(drvdata->base);
@@ -1550,7 +1533,7 @@ static ssize_t status_show(struct device *dev,
CS_LOCK(drvdata->base);
spin_unlock_irqrestore(&drvdata->spinlock, flags);
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(drvdata->dev);
return ret;
}
@@ -1559,7 +1542,6 @@ static DEVICE_ATTR_RO(status);
static ssize_t traceid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int ret;
unsigned long val, flags;
struct etm_drvdata *drvdata = dev_get_drvdata(dev->parent);
@@ -1568,10 +1550,7 @@ static ssize_t traceid_show(struct device *dev,
goto out;
}
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
-
+ pm_runtime_get_sync(drvdata->dev);
spin_lock_irqsave(&drvdata->spinlock, flags);
CS_UNLOCK(drvdata->base);
@@ -1579,7 +1558,7 @@ static ssize_t traceid_show(struct device *dev,
CS_LOCK(drvdata->base);
spin_unlock_irqrestore(&drvdata->spinlock, flags);
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(drvdata->dev);
out:
return sprintf(buf, "%#lx\n", val);
}
@@ -1817,11 +1796,6 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
spin_lock_init(&drvdata->spinlock);
- drvdata->clk = adev->pclk;
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
-
drvdata->cpu = pdata ? pdata->cpu : 0;
get_online_cpus();
@@ -1845,8 +1819,6 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
}
etm_init_default_data(drvdata);
- clk_disable_unprepare(drvdata->clk);
-
desc->type = CORESIGHT_DEV_TYPE_SOURCE;
desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
desc->ops = &etm_cs_ops;
@@ -1859,6 +1831,7 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
goto err_arch_supported;
}
+ pm_runtime_put(&adev->dev);
dev_info(dev, "%s initialized\n", (char *)id->data);
if (boot_enable) {
@@ -1869,7 +1842,6 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
return 0;
err_arch_supported:
- clk_disable_unprepare(drvdata->clk);
if (--etm_count == 0)
unregister_hotcpu_notifier(&etm_cpu_notifier);
return ret;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 23:15:02 +0000