summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/hwtracing/coresight/coresight-tmc.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/drivers/hwtracing/coresight/coresight-tmc.c')
-rw-r--r--kernel/drivers/hwtracing/coresight/coresight-tmc.c31
1 files changed, 8 insertions, 23 deletions
diff --git a/kernel/drivers/hwtracing/coresight/coresight-tmc.c b/kernel/drivers/hwtracing/coresight/coresight-tmc.c
index 7147f3dd3..a57c7ec16 100644
--- a/kernel/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/kernel/drivers/hwtracing/coresight/coresight-tmc.c
@@ -23,7 +23,7 @@
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/spinlock.h>
-#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/coresight.h>
#include <linux/amba/bus.h>
@@ -104,7 +104,6 @@ enum tmc_mem_intf_width {
* @dev: the device entity associated to this component.
* @csdev: component vitals needed by the framework.
* @miscdev: specifics to handle "/dev/xyz.tmc" entry.
- * @clk: the clock this component is associated to.
* @spinlock: only one at a time pls.
* @read_count: manages preparation of buffer for reading.
* @buf: area of memory where trace data get sent.
@@ -120,7 +119,6 @@ struct tmc_drvdata {
struct device *dev;
struct coresight_device *csdev;
struct miscdevice miscdev;
- struct clk *clk;
spinlock_t spinlock;
int read_count;
bool reading;
@@ -242,17 +240,14 @@ static void tmc_etf_enable_hw(struct tmc_drvdata *drvdata)
static int tmc_enable(struct tmc_drvdata *drvdata, enum tmc_mode mode)
{
- int ret;
unsigned long flags;
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- return ret;
+ pm_runtime_get_sync(drvdata->dev);
spin_lock_irqsave(&drvdata->spinlock, flags);
if (drvdata->reading) {
spin_unlock_irqrestore(&drvdata->spinlock, flags);
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(drvdata->dev);
return -EBUSY;
}
@@ -386,7 +381,7 @@ out:
drvdata->enable = false;
spin_unlock_irqrestore(&drvdata->spinlock, flags);
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(drvdata->dev);
dev_info(drvdata->dev, "TMC disabled\n");
}
@@ -568,17 +563,13 @@ static const struct file_operations tmc_fops = {
static ssize_t status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int ret;
unsigned long flags;
u32 tmc_rsz, tmc_sts, tmc_rrp, tmc_rwp, tmc_trg;
u32 tmc_ctl, tmc_ffsr, tmc_ffcr, tmc_mode, tmc_pscr;
u32 devid;
struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent);
- ret = clk_prepare_enable(drvdata->clk);
- if (ret)
- goto out;
-
+ pm_runtime_get_sync(drvdata->dev);
spin_lock_irqsave(&drvdata->spinlock, flags);
CS_UNLOCK(drvdata->base);
@@ -596,8 +587,7 @@ 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 sprintf(buf,
"Depth:\t\t0x%x\n"
@@ -613,7 +603,7 @@ static ssize_t status_show(struct device *dev,
"DEVID:\t\t0x%x\n",
tmc_rsz, tmc_sts, tmc_rrp, tmc_rwp, tmc_trg,
tmc_ctl, tmc_ffsr, tmc_ffcr, tmc_mode, tmc_pscr, devid);
-out:
+
return -EINVAL;
}
static DEVICE_ATTR_RO(status);
@@ -700,11 +690,6 @@ static int tmc_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;
-
devid = readl_relaxed(drvdata->base + CORESIGHT_DEVID);
drvdata->config_type = BMVAL(devid, 6, 7);
@@ -719,7 +704,7 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
drvdata->size = readl_relaxed(drvdata->base + TMC_RSZ) * 4;
}
- clk_disable_unprepare(drvdata->clk);
+ pm_runtime_put(&adev->dev);
if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) {
drvdata->vaddr = dma_alloc_coherent(dev, drvdata->size,