static ssize_t stm_store_stm_en(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct stm_drvdata *drvdata = dev_get_drvdata(dev->parent);
uint32_t val;
int ret = 0;
if (sscanf(buf, "%x", &val) != 1)
return -EINVAL;
if (val) {
exynos_etb_stm();
spin_lock(&drvdata->spinlock);
__stm_enable(drvdata);
drvdata->enable = true;
spin_unlock(&drvdata->spinlock);
} else {
spin_lock(&drvdata->spinlock);
__stm_disable(drvdata);
drvdata->enable = false;
spin_unlock(&drvdata->spinlock);
/* Wait for 100ms so that pending data has been written to HW */
msleep(100);
}
if (ret)
return ret;
return size;
}
static void stm_disable(struct coresight_device *csdev)
{
struct stm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
spin_lock(&drvdata->spinlock);
__stm_disable(drvdata);
drvdata->enable = false;
spin_unlock(&drvdata->spinlock);
/* Wait for 100ms so that pending data has been written to HW */
msleep(100);
dev_info(drvdata->dev, "STM tracing disabled\n");
}
static void stm_disable(struct coresight_device *csdev)
{
struct stm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
spin_lock(&drvdata->spinlock);
__stm_disable(drvdata);
drvdata->enable = false;
spin_unlock(&drvdata->spinlock);
/* */
msleep(100);
clk_disable_unprepare(drvdata->clk);
dev_info(drvdata->dev, "STM tracing disabled\n");
}